Confluence provides stastical information about its internal caches that allows you to track the size and hit ratio of each cache and tune it if necessary, for better performance. See Performance Tuning for more information.

To view the cache statistics, go to the 'Administration Console' and click on 'Cache Statistics' in the left panel. Here, you will find a list of all object cached within Confluence. For example, one of the main one is the ContentEntityObject

com.atlassian.confluence.core.ContentEntityObject (Alive): flush

_____________________ACCESSES__________________

Size

Total

Hits

Not Found

Expired

Ratio

5000

24827480

11332536

13494944

0

45%

About the generated numbers :

Size:

the max number of items in the cache (can be configured in ehcache.xml)

Accesses, Total:

the number of reads from the cache

Accesses, Hits:

the number of reads accessing cache and required content existed

Accesses, Not Found:

the number of reads accessing cache and required content was not-found

Accesses, Expired:

the number of items which were evicted from the cache, due to age or replacement by new entries (timeout or expired)

Ratio:

the percentage of reads which were hits

For instance to calculate Ratio :

Hits/Total x 100 = Ratio

11332536/24827480 = 0.45645131 x 100 = 45%

and to calculate Total :

Total = Hits + Not Found + Expired

24827480 = 11332536 + 13494944 + 0

flush - clears cache

The upcoming new release of cluster-able Confluence 2.3 will be using distributed cache called Tangosol Coherence.

Performance Tuning

If you require to tune your application when under high usage, you may like to review this document for suggestions.

RELATED TOPICS

Except where otherwise noted, content in this space is licensed under a Creative Commons Attribution 2.5 Australia License.