Notice: this Wiki will be going read only early in 2024 and edits will no longer be possible. Please see: https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/wikis/Wiki-shutdown-plan for the plan.
Difference between revisions of "EclipseLink/UserGuide/JPA/Advanced JPA Development/Performance/Performance Monitoring and Profiling/Query Monitoring"
< EclipseLink | UserGuide | JPA | Advanced JPA Development | Performance | Performance Monitoring and Profiling
m |
m |
||
| Line 15: | Line 15: | ||
* Set the System property <tt>org.eclipse.persistence.querymonitor=true</tt>. | * Set the System property <tt>org.eclipse.persistence.querymonitor=true</tt>. | ||
| − | * | + | * In <tt>persistence.xml</tt>, set <tt><property name="eclipselink.profiler" value="QueryMonitor"/></tt> |
The monitor dumps the number of query cache hits and executions (misses) once every 100 seconds. | The monitor dumps the number of query cache hits and executions (misses) once every 100 seconds. | ||
Revision as of 15:17, 28 January 2011
EclipseLink JPA
| EclipseLink | |
| Website | |
| Download | |
| Community | |
| Mailing List • Forums • IRC • mattermost | |
| Issues | |
| Open • Help Wanted • Bug Day | |
| Contribute | |
| Browse Source |
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 the Query Monitor in either of these ways:
- Set the System property org.eclipse.persistence.querymonitor=true.
- In persistence.xml, set <property name="eclipselink.profiler" value="QueryMonitor"/>
The monitor dumps the number of query cache hits and executions (misses) once every 100 seconds.
For more information about querying, see Querying.
