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[DOCS-12171] Add restart note to JFR template override section #36274

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[DOCS-12171] Add restart note to JFR template override section #36274

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[DOCS-12171] Add restart note to JFR template override section
brett0000FF Apr 24, 2026
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Merge branch 'master' into brett.blue/jfr-template-restart-note
brett0000FF Apr 27, 2026
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2 changes: 2 additions & 0 deletions content/en/profiler/profiler_troubleshooting/java.md
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Expand Up @@ -215,6 +215,8 @@ Override templates let you specify profiling properties to override. However, th
java -javaagent:/path/to/dd-java-agent.jar -Ddd.profiling.enabled=true -Ddd.logs.injection=true -Ddd.profiling.jfr-template-override-file=</path/to/override.jfp> -jar path/to/your/app.jar
```

<div class="alert alert-info">JFR template overrides are applied at JVM startup. After you create or modify an override file, restart the application for the changes to take effect.</div>

### Advanced Linux settings for CPU profiles

The CPU profiler engine works on most systems, but if the value of `/proc/sys/kernel/perf_event_paranoid` is set to `3`, the profiler can't use perf events to schedule CPU sampling. This results in degraded profile quality, falling back to using itimer. Set `/proc/sys/kernel/perf_event_paranoid` to `2` or lower with the following command:
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