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 |
|||
| (5 intermediate revisions by one other user not shown) | |||
| Line 1: | Line 1: | ||
| + | ---- | ||
| + | |||
| + | |||
| + | '''[[Image:Elug_draft_icon.png|Warning]] This page is now obsolete. ''' | ||
| + | |||
| + | For current information, please see "Query Monitoring" in the ''EclipseLink Concepts Guide'': | ||
| + | http://www.eclipse.org/eclipselink/documentation/latest/concepts/monitoring004.htm | ||
| + | |||
| + | |||
| + | ---- | ||
| + | |||
| + | |||
{{EclipseLink_UserGuide | {{EclipseLink_UserGuide | ||
|info=y | |info=y | ||
| Line 8: | Line 20: | ||
* [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/QueryMonitor.html QueryMonitor] | ||
}} | }} | ||
| + | |||
=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 | + | 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 <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. | ||
For more information about querying, see [[EclipseLink/UserGuide/JPA/Basic JPA Development/Querying|Querying]]. | For more information about querying, see [[EclipseLink/UserGuide/JPA/Basic JPA Development/Querying|Querying]]. | ||
Latest revision as of 07:43, 17 April 2013
This page is now obsolete.
For current information, please see "Query Monitoring" in the EclipseLink Concepts Guide: http://www.eclipse.org/eclipselink/documentation/latest/concepts/monitoring004.htm
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.
