Confluence provides statistics about its internal caches that allow you to track the size and hit ratio of each cache and tune it for better performance (if necessary). See Performance Tuning for more information.
To view the cache statistics, go to the 'Administration Console' and click 'Cache Statistics' in the left panel. There you will find a list of all objects cached within Confluence. Click on the 'Advanced' tab for more detail. Below is an example for one of the most frequently used caches, the Content Object cache.
| Name |
Percent Used |
Effectiveness |
Objects / Size |
Hit / Miss / Expiry |
Flush |
| Content Object |
80% |
73% |
4023 / 5000 |
374550 / 140460 / 55044 |
Flush |
About the generated numbers :
| Percent Used: |
=(Objects)/(Size) |
| Effectiveness: |
=(Hits)/(Hits + Misses) |
| Objects / Size: |
the number of entries in the cache / the number of total possible entries allowed (configurable) |
| Hit / Miss / Expiry: |
the number of reads accessing cache where required content was found / the number of reads accessing cache where required content was not found / the number of objects evicted from the cache |
| Flush: |
flushes the cache |
For instance to calculate Percent Used :
and to calculate Effectiveness :
Performance Tuning
If you need to tune your application when under high usage, you may like to review this document for suggestions.
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