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Difference between revisions of "EclipseLink/UserGuide/JPA/Advanced JPA Development/Performance/Performance Monitoring and Profiling/Query Monitoring"

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* [http://www.eclipse.org/eclipselink/api/latest/org/eclipse/persistence/tools/profiler/package-summary.html profiler]
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* [http://www.eclipse.org/eclipselink/api/latest/org/eclipse/persistence/tools/profiler/QueryMonitor.html QueryMonitor]
* [http://www.eclipse.org/eclipselink/api/latest/org/eclipse/persistence/tools/profiler/PerformanceProfiler.html PerformanceProfiler]
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=Query Monitoring=
 
=Query Monitoring=
  
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Use the Query Monitor to measure query executions and cache hits. This can be useful for performance analysis in a complex system. Enable this monitor using the System property <tt>"org.eclipse.persistence.querymonitor=true"</tt> or by setting the <tt>persistence.xml</tt> property <tt>eclipselink.profiler=QueryMonitor</tt>. It dumps the number of query cache hits and executions (misses) once every 100 seconds.
  
 
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For more information about querying, see [[EclipseLink/UserGuide/JPA/Basic JPA Development/Querying|Querying]].
  
 
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Revision as of 15:07, 28 January 2011

EclipseLink JPA

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Elug api package icon.png Key API

Query Monitoring

Use the Query Monitor to measure query executions and cache hits. This can be useful for performance analysis in a complex system. Enable this monitor using the System property "org.eclipse.persistence.querymonitor=true" or by setting the persistence.xml property eclipselink.profiler=QueryMonitor. It dumps the number of query cache hits and executions (misses) once every 100 seconds.

For more information about querying, see Querying.

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