1095 lines
33 KiB
Groff
1095 lines
33 KiB
Groff
.\" Copyright (c) 1994, 2019, Oracle and/or its affiliates. All rights reserved.
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.\" DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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.\"
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.\" This code is free software; you can redistribute it and/or modify it
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.\" under the terms of the GNU General Public License version 2 only, as
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.\" published by the Free Software Foundation.
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.\"
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.\" This code is distributed in the hope that it will be useful, but WITHOUT
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.\" ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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.\" FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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.\" version 2 for more details (a copy is included in the LICENSE file that
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.\" accompanied this code).
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.\"
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.\" You should have received a copy of the GNU General Public License version
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.\" 2 along with this work; if not, write to the Free Software Foundation,
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.\" Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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.\"
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.\" Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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.\" or visit www.oracle.com if you need additional information or have any
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.\" questions.
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.\"
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.\" Automatically generated by Pandoc 2.3.1
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.\"
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.TH "JCMD" "1" "2020" "JDK 14" "JDK Commands"
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.hy
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.SH NAME
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.PP
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|
jcmd \- send diagnostic command requests to a running Java Virtual
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Machine (JVM)
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.SH SYNOPSIS
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.PP
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\f[CB]jcmd\f[R] [\f[I]pid\f[R] | \f[I]main\-class\f[R]] \f[I]command\f[R]...
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| \f[CB]PerfCounter.print\f[R] | \f[CB]\-f\f[R] \f[I]filename\f[R]
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.PP
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\f[CB]jcmd\f[R] [\f[CB]\-l\f[R]]
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.PP
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\f[CB]jcmd\f[R] \f[CB]\-h\f[R]
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.TP
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|
.B \f[I]pid\f[R]
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|
When used, the \f[CB]jcmd\f[R] utility sends the diagnostic command
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|
request to the process ID for the Java process.
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.RS
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.RE
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.TP
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|
.B \f[I]main\-class\f[R]
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|
When used, the \f[CB]jcmd\f[R] utility sends the diagnostic command
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|
request to all Java processes with the specified name of the main class.
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.RS
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|
.RE
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.TP
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|
.B \f[I]command\f[R]
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|
The \f[CB]command\f[R] must be a valid \f[CB]jcmd\f[R] command for the
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|
selected JVM.
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The list of available commands for \f[CB]jcmd\f[R] is obtained by running
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|
the \f[CB]help\f[R] command (\f[CB]jcmd\f[R] \f[I]pid\f[R] \f[CB]help\f[R])
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|
where \f[I]pid\f[R] is the process ID for the running Java process.
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If the \f[I]pid\f[R] is \f[CB]0\f[R], commands will be sent to all Java
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processes.
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The main class argument will be used to match, either partially or
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fully, the class used to start Java.
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|
If no options are given, it lists the running Java process identifiers
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|
with the main class and command\-line arguments that were used to launch
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the process (the same as using \f[CB]\-l\f[R]).
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.RS
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.RE
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.TP
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|
.B \f[CB]Perfcounter.print\f[R]
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|
Prints the performance counters exposed by the specified Java process.
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.RS
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|
.RE
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.TP
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|
.B \f[CB]\-f\f[R] \f[I]filename\f[R]
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|
Reads and executes commands from a specified file, \f[I]filename\f[R].
|
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.RS
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|
.RE
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.TP
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|
.B \f[CB]\-l\f[R]
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|
Displays the list of Java Virtual Machine process identifiers that are
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|
not running in a separate docker process along with the main class and
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|
command\-line arguments that were used to launch the process.
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|
If the JVM is in a docker process, you must use tools such as
|
|
\f[CB]ps\f[R] to look up the PID.
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.RS
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.PP
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|
\f[B]Note:\f[R]
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.PP
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|
Using \f[CB]jcmd\f[R] without arguments is the same as using
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|
\f[CB]jcmd\ \-l\f[R].
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.RE
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.TP
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|
.B \f[CB]\-h\f[R]
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|
Displays the \f[CB]jcmd\f[R] utility\[aq]s command\-line help.
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.RS
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.RE
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|
.SH DESCRIPTION
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.PP
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|
The \f[CB]jcmd\f[R] utility is used to send diagnostic command requests to
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the JVM.
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It must be used on the same machine on which the JVM is running, and
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have the same effective user and group identifiers that were used to
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launch the JVM.
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Each diagnostic command has its own set of arguments.
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|
To display the description, syntax, and a list of available arguments
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|
for a diagnostic command, use the name of the command as the argument.
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|
For example:
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.RS
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.PP
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\f[CB]jcmd\f[R] \f[I]pid\f[R] \f[CB]help\f[R] \f[I]command\f[R]
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.RE
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.PP
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If arguments contain spaces, then you must surround them with single or
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double quotation marks (\f[CB]\[aq]\f[R] or \f[CB]"\f[R]).
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In addition, you must escape single or double quotation marks with a
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backslash (\f[CB]\\\f[R]) to prevent the operating system shell from
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processing quotation marks.
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|
Alternatively, you can surround these arguments with single quotation
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marks and then with double quotation marks (or with double quotation
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marks and then with single quotation marks).
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.PP
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If you specify the process identifier (\f[I]pid\f[R]) or the main class
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|
(\f[I]main\-class\f[R]) as the first argument, then the \f[CB]jcmd\f[R]
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|
utility sends the diagnostic command request to the Java process with
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the specified identifier or to all Java processes with the specified
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name of the main class.
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You can also send the diagnostic command request to all available Java
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processes by specifying \f[CB]0\f[R] as the process identifier.
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.SH COMMANDS FOR JCMD
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.PP
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|
The \f[I]command\f[R] must be a valid \f[CB]jcmd\f[R] diagnostic command
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for the selected JVM.
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The list of available commands for \f[CB]jcmd\f[R] is obtained by running
|
|
the \f[CB]help\f[R] command (\f[CB]jcmd\f[R] \f[I]pid\f[R] \f[CB]help\f[R])
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|
where \f[I]pid\f[R] is the process ID for a running Java process.
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|
If the \f[I]pid\f[R] is \f[CB]0\f[R], commands will be sent to all Java
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|
processes.
|
|
The main class argument will be used to match, either partially or
|
|
fully, the class used to start Java.
|
|
If no options are given, it lists the running Java process identifiers
|
|
that are not in separate docker processes along with the main class and
|
|
command\-line arguments that were used to launch the process (the same
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|
as using \f[CB]\-l\f[R]).
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.PP
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|
The following commands are available:
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.TP
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|
.B \f[CB]help\f[R] [\f[I]options\f[R]] [\f[I]arguments\f[R]]
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For more information about a specific command.
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.RS
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.PP
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\f[I]arguments\f[R]:
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.IP \[bu] 2
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\f[I]command name\f[R]: The name of the command for which we want help
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(STRING, no default value)
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.PP
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|
\f[B]Note:\f[R]
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.PP
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The following \f[I]options\f[R] must be specified using either
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\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
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.PP
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\f[I]options\f[R]:
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.IP \[bu] 2
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\f[CB]\-all\f[R]: (Optional) Show help for all commands (BOOLEAN, false) .
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.RE
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.TP
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|
.B \f[CB]Compiler.codecache\f[R]
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|
Prints code cache layout and bounds.
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.RS
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.PP
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|
Impact: Low
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|
.PP
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|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
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.RE
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.TP
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|
.B \f[CB]Compiler.codelist\f[R]
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|
Prints all compiled methods in code cache that are alive.
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.RS
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.PP
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|
Impact: Medium
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.PP
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|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
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.RE
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|
.TP
|
|
.B \f[CB]Compiler.queue\f[R]
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|
Prints methods queued for compilation.
|
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.RS
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|
.PP
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|
Impact: Low
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|
.PP
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|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
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|
.RE
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|
.TP
|
|
.B \f[CB]Compiler.directives_add\ *filename*\ *arguments*\f[R]
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|
Adds compiler directives from a file.
|
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.RS
|
|
.PP
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|
Impact: Low
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|
.PP
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|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
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.PP
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|
\f[I]arguments\f[R]:
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|
.PP
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|
\f[I]filename\f[R]: The name of the directives file (STRING, no default
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value)
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.RE
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|
.TP
|
|
.B \f[CB]Compiler.directives_clear\f[R]
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|
Remove all compiler directives.
|
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.RS
|
|
.PP
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|
Impact: Low
|
|
.PP
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|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
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|
.RE
|
|
.TP
|
|
.B \f[CB]Compiler.directives_print\f[R]
|
|
Prints all active compiler directives.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
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|
.RE
|
|
.TP
|
|
.B \f[CB]Compiler.directives_remove\f[R]
|
|
Remove latest added compiler directive.
|
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.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.RE
|
|
.TP
|
|
.B \f[CB]GC.class_histogram\f[R] [\f[I]options\f[R]]
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|
Provides statistics about the Java heap usage.
|
|
.RS
|
|
.PP
|
|
Impact: High \-\-\- depends on Java heap size and content.
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
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|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The \f[I]options\f[R] must be specified using either \f[I]key\f[R] or
|
|
\f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]\-all\f[R]: (Optional) Inspects all objects, including unreachable
|
|
objects (BOOLEAN, false)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]GC.class_stats\f[R] [\f[I]options\f[R]] [\f[I]arguments\f[R]]
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|
(Deprecated) Provide statistics about Java class meta data.
|
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.RS
|
|
.PP
|
|
Impact: High \-\-\- depends on Java heap size and content.
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The \f[I]options\f[R] must be specified using either \f[I]key\f[R] or
|
|
\f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]\-all\f[R]: (Optional) Shows all columns (BOOLEAN, false)
|
|
.IP \[bu] 2
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|
\f[CB]\-csv\f[R]: (Optional) Prints in CSV (comma\-separated values)
|
|
format for spreadsheets (BOOLEAN, false)
|
|
.IP \[bu] 2
|
|
\f[CB]\-help\f[R]: (Optional) Shows the meaning of all the columns
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|
(BOOLEAN, false)
|
|
.PP
|
|
\f[I]arguments\f[R]:
|
|
.IP \[bu] 2
|
|
\f[I]columns\f[R]: (Optional) Comma\-separated list of all the columns to
|
|
be shown.
|
|
If not specified, the following columns are shown:
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.RS 2
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|
.IP \[bu] 2
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|
InstBytes
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|
.IP \[bu] 2
|
|
KlassBytes
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|
.IP \[bu] 2
|
|
CpAll
|
|
.IP \[bu] 2
|
|
annotations
|
|
.IP \[bu] 2
|
|
MethodCount
|
|
.IP \[bu] 2
|
|
Bytecodes
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|
.IP \[bu] 2
|
|
MethodAll
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|
.IP \[bu] 2
|
|
ROAll
|
|
.IP \[bu] 2
|
|
RWAll
|
|
.IP \[bu] 2
|
|
Total
|
|
.PP
|
|
(STRING, no default value)
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|
.RE
|
|
.RE
|
|
.TP
|
|
.B \f[CB]GC.finalizer_info\f[R]
|
|
Provides information about the Java finalization queue.
|
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.RS
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|
.PP
|
|
Impact: Medium
|
|
.PP
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|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
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|
.RE
|
|
.TP
|
|
.B \f[CB]GC.heap_dump\f[R] [\f[I]options\f[R]] [\f[I]arguments\f[R]]
|
|
Generates a HPROF format dump of the Java heap.
|
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.RS
|
|
.PP
|
|
Impact: High \-\-\- depends on the Java heap size and content.
|
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Request a full GC unless the \f[CB]\-all\f[R] option is specified.
|
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.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The following \f[I]options\f[R] must be specified using either
|
|
\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
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.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]\-all\f[R]: (Optional) Dump all objects, including unreachable
|
|
objects (BOOLEAN, false)
|
|
.PP
|
|
\f[I]arguments\f[R]:
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|
.IP \[bu] 2
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|
\f[I]filename\f[R]: The name of the dump file (STRING, no default value)
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.RE
|
|
.TP
|
|
.B \f[CB]GC.heap_info\f[R]
|
|
Provides generic Java heap information.
|
|
.RS
|
|
.PP
|
|
Impact: Medium
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.RE
|
|
.TP
|
|
.B \f[CB]GC.run\f[R]
|
|
Calls \f[CB]java.lang.System.gc()\f[R].
|
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.RS
|
|
.PP
|
|
Impact: Medium \-\-\- depends on the Java heap size and content.
|
|
.RE
|
|
.TP
|
|
.B \f[CB]GC.run_finalization\f[R]
|
|
Calls \f[CB]java.lang.System.runFinalization()\f[R].
|
|
.RS
|
|
.PP
|
|
Impact: Medium \-\-\- depends on the Java content.
|
|
.RE
|
|
.TP
|
|
.B \f[CB]JFR.check\f[R] [\f[I]options\f[R]]
|
|
Show information about a running flight recording
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The \f[I]options\f[R] must be specified using either \f[I]key\f[R] or
|
|
\f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
If no parameters are entered, information for all active recordings is
|
|
shown.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]name\f[R]: (Optional) Name of the flight recording.
|
|
(STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]verbose\f[R]: (Optional) Flag for printing the event settings for
|
|
the recording (BOOLEAN, false)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]JFR.configure\f[R] [\f[I]options\f[R]]
|
|
Set the parameters for a flight recording
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The \f[I]options\f[R] must be specified using either \f[I]key\f[R] or
|
|
\f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
If no parameters are entered, the current settings are displayed.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]globalbuffercount\f[R]: (Optional) Number of global buffers.
|
|
This option is a legacy option: change the \f[CB]memorysize\f[R] parameter
|
|
to alter the number of global buffers.
|
|
This value cannot be changed once JFR has been initalized.
|
|
(STRING, default determined by the value for \f[CB]memorysize\f[R])
|
|
.IP \[bu] 2
|
|
\f[CB]globalbuffersize\f[R]: (Optional) Size of the global buffers, in
|
|
bytes.
|
|
This option is a legacy option: change the \f[CB]memorysize\f[R] parameter
|
|
to alter the size of the global buffers.
|
|
This value cannot be changed once JFR has been initalized.
|
|
(STRING, default determined by the value for \f[CB]memorysize\f[R])
|
|
.IP \[bu] 2
|
|
\f[CB]maxchunksize\f[R]: (Optional) Maximum size of an individual data
|
|
chunk in bytes if one of the following suffixes is not used: \[aq]m\[aq]
|
|
or \[aq]M\[aq] for megabytes OR \[aq]g\[aq] or \[aq]G\[aq] for
|
|
gigabytes.
|
|
This value cannot be changed once JFR has been initialized.
|
|
(STRING, 12M)
|
|
.IP \[bu] 2
|
|
\f[CB]memorysize\f[R]: (Optional) Overall memory size, in bytes if one of
|
|
the following suffixes is not used: \[aq]m\[aq] or \[aq]M\[aq] for
|
|
megabytes OR \[aq]g\[aq] or \[aq]G\[aq] for gigabytes.
|
|
This value cannot be changed once JFR has been initialized.
|
|
(STRING, 10M)
|
|
.IP \[bu] 2
|
|
\f[CB]repositorypath\f[R]: (Optional) Path to the location where
|
|
recordings are stored until they are written to a permanent file.
|
|
(STRING, The default location is the temporary directory for the
|
|
operating system.
|
|
On Linux operating systems, the temporary directory is \f[CB]/tmp\f[R].
|
|
On Windwows, the temporary directory is specified by the \f[CB]TMP\f[R]
|
|
environment variable.)
|
|
.IP \[bu] 2
|
|
\f[CB]stackdepth\f[R]: (Optional) Stack depth for stack traces.
|
|
Setting this value greater than the default of 64 may cause a
|
|
performance degradation.
|
|
This value cannot be changed once JFR has been initialized.
|
|
(LONG, 64)
|
|
.IP \[bu] 2
|
|
\f[CB]thread_buffer_size\f[R]: (Optional) Local buffer size for each
|
|
thread in bytes if one of the following suffixes is not used:
|
|
\[aq]k\[aq] or \[aq]K\[aq] for kilobytes or \[aq]m\[aq] or \[aq]M\[aq]
|
|
for megabytes.
|
|
Overriding this parameter could reduce performance and is not
|
|
recommended.
|
|
This value cannot be changed once JFR has been initialized.
|
|
(STRING, 8k)
|
|
.IP \[bu] 2
|
|
\f[CB]samplethreads\f[R]: (Optional) Flag for activating thread sampling.
|
|
(BOOLEAN, true)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]JFR.dump\f[R] [\f[I]options\f[R]]
|
|
Write data to a file while a flight recording is running
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The \f[I]options\f[R] must be specified using either \f[I]key\f[R] or
|
|
\f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
No options are required.
|
|
The recording continues to run after the data is written.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]begin\f[R]: (Optional) Specify the time from which recording data
|
|
will be included in the dump file.
|
|
The format is specified as local time.
|
|
(STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]end\f[R]: (Optional) Specify the time to which recording data will
|
|
be included in the dump file.
|
|
The format is specified as local time.
|
|
(STRING, no default value)
|
|
.RS 2
|
|
.PP
|
|
\f[B]Note:\f[R] For both \f[CB]begin\f[R] and \f[CB]end\f[R], the time must
|
|
be in a format that can be read by java.time.LocalTime::parse(STRING),
|
|
java.time.LocalDateTime::parse(STRING) or
|
|
java.time.Instant::parse(STRING).
|
|
For example, "13:20:15", "2020\-03\-17T09:00:00" or
|
|
"2020\-03\-17T09:00:00Z".
|
|
.PP
|
|
\f[B]Note:\f[R] \f[CB]begin\f[R] and \f[CB]end\f[R] times correspond to the
|
|
timestamps found within the recorded information in the flight recording
|
|
data.
|
|
.PP
|
|
Another option is to use a time relative to the current time that is
|
|
specified by a negative integer followed by "s", "m" or "h".
|
|
For example, "\-12h", "\-15m" or "\-30s"
|
|
.RE
|
|
.IP \[bu] 2
|
|
\f[CB]filename\f[R]: (Optional) Name of the file to which the flight
|
|
recording data is dumped.
|
|
If no filename is given, a filename is generated from the PID and the
|
|
current date.
|
|
The filename may also be a directory in which case, the filename is
|
|
generated from the PID and the current date in the specified directory.
|
|
(STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]maxage\f[R]: (Optional) Length of time for dumping the flight
|
|
recording data to a file.
|
|
(INTEGER followed by \[aq]s\[aq] for seconds \[aq]m\[aq] for minutes or
|
|
\[aq]h\[aq] for hours, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]maxsize\f[R]: (Optional) Maximum size for the amount of data to dump
|
|
from a flight recording in bytes if one of the following suffixes is not
|
|
used: \[aq]m\[aq] or \[aq]M\[aq] for megabytes OR \[aq]g\[aq] or
|
|
\[aq]G\[aq] for gigabytes.
|
|
(STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]name\f[R]: (Optional) Name of the recording.
|
|
If no name is given, data from all recordings is dumped.
|
|
(STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]path\-to\-gc\-root\f[R]: (Optional) Flag for saving the path to
|
|
garbage collection (GC) roots at the time the recording data is dumped.
|
|
The path information is useful for finding memory leaks but collecting
|
|
it can cause the application to pause for a short period of time.
|
|
Turn on this flag only when you have an application that you suspect has
|
|
a memory leak.
|
|
(BOOLEAN, false)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]JFR.start\f[R] [\f[I]options\f[R]]
|
|
Start a flight recording
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The \f[I]options\f[R] must be specified using either \f[I]key\f[R] or
|
|
\f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
If no parameters are entered, then a recording is started with default
|
|
values.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]delay\f[R]: (Optional) Length of time to wait before starting to
|
|
record (INTEGER followed by \[aq]s\[aq] for seconds \[aq]m\[aq] for
|
|
minutes or \[aq]h\[aq] for hours, 0s)
|
|
.IP \[bu] 2
|
|
\f[CB]disk\f[R]: (Optional) Flag for also writing the data to disk while
|
|
recording (BOOLEAN, true)
|
|
.IP \[bu] 2
|
|
\f[CB]dumponexit\f[R]: (Optional) Flag for writing the recording to disk
|
|
when the Java Virtual Machine (JVM) shuts down.
|
|
If set to \[aq]true\[aq] and no value is given for \f[CB]filename\f[R],
|
|
the recording is written to a file in the directory where the process
|
|
was started.
|
|
The file name is a system\-generated name that contains the process ID,
|
|
the recording ID and the current time stamp.
|
|
(For example: \f[CB]id\-1\-2019_12_12_10_41.jfr\f[R]) (BOOLEAN, false)
|
|
.IP \[bu] 2
|
|
\f[CB]duration\f[R]: (Optional) Length of time to record.
|
|
Note that \f[CB]0s\f[R] means forever (INTEGER followed by \[aq]s\[aq] for
|
|
seconds \[aq]m\[aq] for minutes or \[aq]h\[aq] for hours, 0s)
|
|
.IP \[bu] 2
|
|
\f[CB]filename\f[R]: (Optional) Name of the file to which the flight
|
|
recording data is written when the recording is stopped.
|
|
If no filename is given, a filename is generated from the PID and the
|
|
current date and is placed in the directory where the process was
|
|
started.
|
|
The filename may also be a directory in which case, the filename is
|
|
generated from the PID and the current date in the specified directory.
|
|
(STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]maxage\f[R]: (Optional) Maximum time to keep the recorded data on
|
|
disk.
|
|
This parameter is valid only when the \f[CB]disk\f[R] parameter is set to
|
|
\f[CB]true\f[R].
|
|
Note \f[CB]0s\f[R] means forever.
|
|
(INTEGER followed by \[aq]s\[aq] for seconds \[aq]m\[aq] for minutes or
|
|
\[aq]h\[aq] for hours, 0s)
|
|
.IP \[bu] 2
|
|
\f[CB]maxsize\f[R]: (Optional) Maximum size of the data to keep on disk in
|
|
bytes if one of the following suffixes is not used: \[aq]m\[aq] or
|
|
\[aq]M\[aq] for megabytes OR \[aq]g\[aq] or \[aq]G\[aq] for gigabytes.
|
|
This parameter is valid only when the \f[CB]disk\f[R] parameter is set to
|
|
\[aq]true\[aq].
|
|
The value must not be less than the value for the \f[CB]maxchunksize\f[R]
|
|
parameter set with the \f[CB]JFR.configure\f[R] command.
|
|
(STRING, 0 (no maximum size))
|
|
.IP \[bu] 2
|
|
\f[CB]name\f[R]: (Optional) Name of the recording.
|
|
If no name is provided, a name is generated.
|
|
Make note of the generated name that is shown in the response to the
|
|
command so that you can use it with other commands.
|
|
(STRING, system\-generated default name)
|
|
.IP \[bu] 2
|
|
\f[CB]path\-to\-gc\-root\f[R]: (Optional) Flag for saving the path to
|
|
garbage collection (GC) roots at the end of a recording.
|
|
The path information is useful for finding memory leaks but collecting
|
|
it is time consuming.
|
|
Turn on this flag only when you have an application that you suspect has
|
|
a memory leak.
|
|
If the \f[CB]settings\f[R] parameter is set to \[aq]profile\[aq], then the
|
|
information collected includes the stack trace from where the potential
|
|
leaking object was allocated.
|
|
(BOOLEAN, false)
|
|
.IP \[bu] 2
|
|
\f[CB]settings\f[R]: (Optional) Name of the settings file that identifies
|
|
which events to record.
|
|
To specify more than one file, separate the names with a comma
|
|
(\[aq],\[aq]).
|
|
Include the path if the file is not in \f[CB]JAVA\-HOME\f[R]/lib/jfr.
|
|
The following profiles are included with the JDK in the
|
|
\f[CB]JAVA\-HOME\f[R]/lib/jfr directory: \[aq]default.jfc\[aq]: collects a
|
|
predefined set of information with low overhead, so it has minimal
|
|
impact on performance and can be used with recordings that run
|
|
continuously; \[aq]profile.jfc\[aq]: Provides more data than the
|
|
\[aq]default.jfc\[aq] profile, but with more overhead and impact on
|
|
performance.
|
|
Use this configuration for short periods of time when more information
|
|
is needed.
|
|
Use \f[CB]none\f[R] to start a recording without a predefined
|
|
configuration file.
|
|
(STRING, \f[CB]JAVA\-HOME\f[R]/lib/jfr/default.jfc)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]JFR.stop\f[R] [\f[I]options\f[R]]
|
|
Stop a flight recording
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The \f[I]options\f[R] must be specified using either \f[I]key\f[R] or
|
|
\f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
If no parameters are entered, then no recording is stopped.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]filename\f[R]: (Optional) Name of the file to which the recording is
|
|
written when the recording is stopped.
|
|
If no path is provided, the data from the recording is discarded.
|
|
(STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]name\f[R]: (Optional) Name of the recording (STRING, no default
|
|
value)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]JVMTI.agent_load\f[R] [\f[I]arguments\f[R]]
|
|
Loads JVMTI native agent.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(control)\f[R]
|
|
.PP
|
|
\f[I]arguments\f[R]:
|
|
.IP \[bu] 2
|
|
\f[I]library path\f[R]: Absolute path of the JVMTI agent to load.
|
|
(STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[I]agent option\f[R]: (Optional) Option string to pass the agent.
|
|
(STRING, no default value)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]JVMTI.data_dump\f[R]
|
|
Signals the JVM to do a data\-dump request for JVMTI.
|
|
.RS
|
|
.PP
|
|
Impact: High
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.RE
|
|
.TP
|
|
.B \f[CB]ManagementAgent.start\f[R] [\f[I]options\f[R]]
|
|
Starts remote management agent.
|
|
.RS
|
|
.PP
|
|
Impact: Low \-\-\- no impact
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The following \f[I]options\f[R] must be specified using either
|
|
\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]config.file\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.config.file\f[R] (STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.host\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxremote.host\f[R] (STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.port\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxremote.port\f[R] (STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.rmi.port\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxremote.rmi.port\f[R] (STRING, no default
|
|
value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.ssl\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxremote.ssl\f[R] (STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.registry.ssl\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxremote.registry.ssl\f[R] (STRING, no default
|
|
value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.authenticate\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxremote.authenticate\f[R] (STRING, no default
|
|
value)
|
|
.IP \[bu] 2
|
|
jmxremote.password.file: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxremote.password.file\f[R] (STRING, no default
|
|
value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.access.file\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxremote.acce\ ss.file\f[R] (STRING, no default
|
|
value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.login.config\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxremote.log\ in.config\f[R] (STRING, no default
|
|
value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.ssl.enabled.cipher.suites\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management\f[R].
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.ssl.enabled.cipher.suite\f[R]: (STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.ssl.enabled.protocols\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxr\ emote.ssl.enabled.protocols\f[R] (STRING,
|
|
no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.ssl.need.client.auth\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxre\ mote.need.client.auth\f[R] (STRING, no
|
|
default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.ssl.config.file\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxremote.\ ssl_config_file\f[R] (STRING, no
|
|
default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jmxremote.autodiscovery\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jmxremote.au\ todiscovery\f[R] (STRING, no
|
|
default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jdp.port\f[R]: (Optional) Sets \f[CB]com.sun.management.jdp.port\f[R]
|
|
(INT, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jdp.address\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jdp.address\f[R] (STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jdp.source_addr\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jdp.source_addr\f[R] (STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jdp.ttl\f[R]: (Optional) Sets \f[CB]com.sun.management.jdp.ttl\f[R]
|
|
(INT, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jdp.pause\f[R]: (Optional) Sets
|
|
\f[CB]com.sun.management.jdp.pause\f[R] (INT, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]jdp.name\f[R]: (Optional) Sets \f[CB]com.sun.management.jdp.name\f[R]
|
|
(STRING, no default value)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]ManagementAgent.start_local\f[R]
|
|
Starts the local management agent.
|
|
.RS
|
|
.PP
|
|
Impact: Low \-\-\- no impact
|
|
.RE
|
|
.TP
|
|
.B \f[CB]ManagementAgent.status\f[R]
|
|
Print the management agent status.
|
|
.RS
|
|
.PP
|
|
Impact: Low \-\-\- no impact
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.RE
|
|
.TP
|
|
.B \f[CB]ManagementAgent.stop\f[R]
|
|
Stops the remote management agent.
|
|
.RS
|
|
.PP
|
|
Impact: Low \-\-\- no impact
|
|
.RE
|
|
.TP
|
|
.B \f[CB]Thread.print\f[R] [\f[I]options\f[R]]
|
|
Prints all threads with stacktraces.
|
|
.RS
|
|
.PP
|
|
Impact: Medium \-\-\- depends on the number of threads.
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The following \f[I]options\f[R] must be specified using either
|
|
\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]\-l\f[R]: (Optional) Prints \f[CB]java.util.concurrent\f[R] locks
|
|
(BOOLEAN, false)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.classloader_stats\f[R]
|
|
Prints statistics about all ClassLoaders.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.class_hierarchy\f[R] [\f[I]options\f[R]] [\f[I]arguments\f[R]]
|
|
Prints a list of all loaded classes, indented to show the class
|
|
hierarchy.
|
|
The name of each class is followed by the ClassLoaderData* of its
|
|
ClassLoader, or "null" if it is loaded by the bootstrap class loader.
|
|
.RS
|
|
.PP
|
|
Impact: Medium \-\-\- depends on the number of loaded classes.
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The following \f[I]options\f[R] must be specified using either
|
|
\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]\-i\f[R]: (Optional) Inherited interfaces should be printed.
|
|
(BOOLEAN, false)
|
|
.IP \[bu] 2
|
|
\f[CB]\-s\f[R]: (Optional) If a class name is specified, it prints the
|
|
subclasses.
|
|
If the class name is not specified, only the superclasses are printed.
|
|
(BOOLEAN, false)
|
|
.PP
|
|
\f[I]arguments\f[R]:
|
|
.IP \[bu] 2
|
|
\f[I]classname\f[R]: (Optional) The name of the class whose hierarchy
|
|
should be printed.
|
|
If not specified, all class hierarchies are printed.
|
|
(STRING, no default value)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.command_line\f[R]
|
|
Prints the command line used to start this VM instance.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.dynlibs\f[R]
|
|
Prints the loaded dynamic libraries.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.info\f[R]
|
|
Prints information about the JVM environment and status.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.log\f[R] [\f[I]options\f[R]]
|
|
Lists current log configuration, enables/disables/configures a log
|
|
output, or ro tates all logs.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(control)\f[R]
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The following \f[I]options\f[R] must be specified using either
|
|
\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
.IP \[bu] 2
|
|
\f[CB]output\f[R]: (Optional) The name or index (#) of output to
|
|
configure.
|
|
(STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]output_options\f[R]: (Optional) Options for the output.
|
|
(STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]what\f[R]: (Optional) Configures what tags to log.
|
|
(STRING, no default value )
|
|
.IP \[bu] 2
|
|
\f[CB]decorators\f[R]: (Optional) Configures which decorators to use.
|
|
Use \[aq]none\[aq] or an empty value to remove all.
|
|
(STRING, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]disable\f[R]: (Optional) Turns off all logging and clears the log
|
|
configuration.
|
|
(BOOLEAN, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]list\f[R]: (Optional) Lists current log configuration.
|
|
(BOOLEAN, no default value)
|
|
.IP \[bu] 2
|
|
\f[CB]rotate\f[R]: (Optional) Rotates all logs.
|
|
(BOOLEAN, no default value)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.flags\f[R] [\f[I]options\f[R]]
|
|
Prints the VM flag options and their current values.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The following \f[I]options\f[R] must be specified using either
|
|
\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]\-all\f[R]: (Optional) Prints all flags supported by the VM
|
|
(BOOLEAN, false).
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.native_memory\f[R] [\f[I]options\f[R]]
|
|
Prints native memory usage
|
|
.RS
|
|
.PP
|
|
Impact: Medium
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The following \f[I]options\f[R] must be specified using either
|
|
\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]summary\f[R]: (Optional) Requests runtime to report current memory
|
|
summary, which includes total reserved and committed memory, along with
|
|
memory usage summary by each subsystem.
|
|
(BOOLEAN, false)
|
|
.IP \[bu] 2
|
|
\f[CB]detail\f[R]: (Optional) Requests runtime to report memory allocation
|
|
>= 1K by each callsite.
|
|
(BOOLEAN, false)
|
|
.IP \[bu] 2
|
|
\f[CB]baseline\f[R]: (Optional) Requests runtime to baseline current
|
|
memory usage, so it can be compared against in later time.
|
|
(BOOLEAN, false)
|
|
.IP \[bu] 2
|
|
\f[CB]summary.diff\f[R]: (Optional) Requests runtime to report memory
|
|
summary comparison against previous baseline.
|
|
(BOOLEAN, false)
|
|
.IP \[bu] 2
|
|
\f[CB]detail.diff\f[R]: (Optional) Requests runtime to report memory
|
|
detail comparison against previous baseline, which shows the memory
|
|
allocation activities at different callsites.
|
|
(BOOLEAN, false)
|
|
.IP \[bu] 2
|
|
\f[CB]shutdown\f[R]: (Optional) Requests runtime to shutdown itself and
|
|
free the memory used by runtime.
|
|
(BOOLEAN, false)
|
|
.IP \[bu] 2
|
|
\f[CB]statistics\f[R]: (Optional) Prints tracker statistics for tuning
|
|
purpose.
|
|
(BOOLEAN, false)
|
|
.IP \[bu] 2
|
|
\f[CB]scale\f[R]: (Optional) Memory usage in which scale, KB, MB or GB
|
|
(STRING, KB)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.print_touched_methods\f[R]
|
|
Prints all methods that have ever been touched during the lifetime of
|
|
this JVM.
|
|
.RS
|
|
.PP
|
|
Impact: Medium \-\-\- depends on Java content.
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.set_flag\f[R] [\f[I]arguments\f[R]]
|
|
Sets the VM flag option by using the provided value.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(control)\f[R]
|
|
.PP
|
|
\f[I]arguments\f[R]:
|
|
.IP \[bu] 2
|
|
\f[I]flag name\f[R]: The name of the flag that you want to set (STRING,
|
|
no default value)
|
|
.IP \[bu] 2
|
|
\f[I]string value\f[R]: (Optional) The value that you want to set
|
|
(STRING, no default value)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.stringtable\f[R] [\f[I]options\f[R]]
|
|
Dumps the string table.
|
|
.RS
|
|
.PP
|
|
Impact: Medium \-\-\- depends on the Java content.
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The following \f[I]options\f[R] must be specified using either
|
|
\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]\-verbose\f[R]: (Optional) Dumps the content of each string in the
|
|
table (BOOLEAN, false)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.symboltable\f[R] [\f[I]options\f[R]]
|
|
Dumps the symbol table.
|
|
.RS
|
|
.PP
|
|
Impact: Medium \-\-\- depends on the Java content.
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The following \f[I]options\f[R] must be specified using either
|
|
\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax).
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]\-verbose\f[R]: (Optional) Dumps the content of each symbol in the
|
|
table (BOOLEAN, false)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.systemdictionary\f[R]
|
|
Prints the statistics for dictionary hashtable sizes and bucket length.
|
|
.RS
|
|
.PP
|
|
Impact: Medium
|
|
.PP
|
|
Permission: \f[CB]java.lang.management.ManagementPermission(monitor)\f[R]
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The following \f[I]options\f[R] must be specified using either
|
|
\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]verbose\f[R]: (Optional) Dump the content of each dictionary entry
|
|
for all class loaders (BOOLEAN, false) .
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.system_properties\f[R]
|
|
Prints the system properties.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission: \f[CB]java.util.PropertyPermission(*,\ read)\f[R]
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.uptime\f[R] [\f[I]options\f[R]]
|
|
Prints the VM uptime.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
\f[B]Note:\f[R]
|
|
.PP
|
|
The following \f[I]options\f[R] must be specified using either
|
|
\f[I]key\f[R] or \f[I]key\f[R]\f[CB]=\f[R]\f[I]value\f[R] syntax.
|
|
.PP
|
|
\f[I]options\f[R]:
|
|
.IP \[bu] 2
|
|
\f[CB]\-date\f[R]: (Optional) Adds a prefix with the current date
|
|
(BOOLEAN, false)
|
|
.RE
|
|
.TP
|
|
.B \f[CB]VM.version\f[R]
|
|
Prints JVM version information.
|
|
.RS
|
|
.PP
|
|
Impact: Low
|
|
.PP
|
|
Permission:
|
|
\f[CB]java.util.PropertyPermission(java.vm.version,\ read)\f[R]
|
|
.RE
|