YourKit Manually Configure Target JVM for Remote Profiling: Difference between revisions
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java -agentpath:<''profiler-agent-path''>=help | java -agentpath:<''profiler-agent-path''>=help | ||
Once the target VM has been instrumented and it is listening on a profiler-dedicated port, the profiler UI can connect to it over a variety of means (directly, by [[YourKit_Operations#Connect_to_a_Remote_Instrumented_JVM_via_SSH|initiating a SSH connection from the profiler UI]], by [[YourKit_Operations#Connect_to_a_Remote_Instrumented_JVM_via_an_SSH_Tunnel|using a SSH tunnel]], etc.) | |||
=Options= | =Options= | ||
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Example: | Example: | ||
java ... -agentpath:<''profiler-agent-path''>=alloceach=10,allocsizelimit=4096 ... | java ... -agentpath:<''profiler-agent-path''>=port=8080,alloceach=10,allocsizelimit=4096 ... | ||
Startup options: {{External|https://www.yourkit.com/docs/java/help/startup_options.jsp}} | Startup options: {{External|https://www.yourkit.com/docs/java/help/startup_options.jsp}} | ||
==port== | |||
The port the profiler agent listens on for communication with the profiler UI. By default, the port is chosen automatically, starting with 10001. The first port free in the 10001..10010 range is used. | |||
==dir== | |||
dir=<''dir-for-snapshots-absolute-path''> | |||
A custom directory for snapshots. The default value, if not set is $USER/Snapshots. | |||
Note the user running the JVM must have write permission into that directory. | |||
==telemetrylimit== | |||
Configures the size of the [[YourKit_Concepts#Profiler_Agent_Buffer|profiler agent's buffer]]. | |||
==disablealloc== | |||
See [[YourKit_Concepts#Object_Allocation_Recording|Object Allocation Recording]]. | |||
==disableall== | |||
See [[YourKit_Concepts#Object_Allocation_Recording|Object Allocation Recording]]. | |||
Latest revision as of 01:38, 12 June 2018
External
Internal
Overview
Start the JVM with the following configuration:
java ... -agentpath:<profiler-agent-path>[=options] ...
Linux example
java ... -agentpath:<profiler-directory>/bin/linux-x86-64/libyjpagent.so
To check that Java can load the profiler agent, run:
java -agentpath:<profiler-agent-path>=help
Once the target VM has been instrumented and it is listening on a profiler-dedicated port, the profiler UI can connect to it over a variety of means (directly, by initiating a SSH connection from the profiler UI, by using a SSH tunnel, etc.)
Options
Example:
java ... -agentpath:<profiler-agent-path>=port=8080,alloceach=10,allocsizelimit=4096 ...
Startup options:
port
The port the profiler agent listens on for communication with the profiler UI. By default, the port is chosen automatically, starting with 10001. The first port free in the 10001..10010 range is used.
dir
dir=<dir-for-snapshots-absolute-path>
A custom directory for snapshots. The default value, if not set is $USER/Snapshots.
Note the user running the JVM must have write permission into that directory.
telemetrylimit
Configures the size of the profiler agent's buffer.
disablealloc
See Object Allocation Recording.