[
https://issues.apache.org/jira/browse/OAK-3850?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15092002#comment-15092002
]
Teodor Rosu commented on OAK-3850:
----------------------------------
After a quick inspection:
1. In this case the following methods will return zeros: _getTotalLoadTime_,
_getAverageLoadPenality_, _getEvictionCount_, _getElementCount_(see 2) ,
_getMaxTotalWeight_, _estimateCurrentWeight_.
2. *element count*
- NodeCache would need a "get size" operation that would translate to a
MultiGenerationMap "get size" operation
- the general MultiGenerationMap can contain the same element in multiple
generations ( CacheMaps )
- as a result the size is not accurate in the general case
*cache memory size for a type*
- looking at the MVStore, I don't think it's possible to compute the amount of
space used by individual Maps
3. I agree. Impact on performance needs proper investigation. I will look into
this and get back with numbers.
> Collect and expose Persistent Cache stats
> -----------------------------------------
>
> Key: OAK-3850
> URL: https://issues.apache.org/jira/browse/OAK-3850
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, documentmk
> Reporter: Teodor Rosu
> Attachments: OAK-3850-v0.patch
>
>
> Expose persistent cache statistics ( see: [Guava
> CacheStats|http://docs.guava-libraries.googlecode.com/git/javadoc/com/google/common/cache/CacheStats.html]
> )
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
