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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/ | + | * [http://www.eclipse.org/eclipselink/api/latest/org/eclipse/persistence/tools/profiler/QueryMonitor.html QueryMonitor] |
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=Query Monitoring= | =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 <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. | ||
| − | + | 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
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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.
