Marcel Reutegger created JCR-3374:
-------------------------------------
Summary: Size estimate for
AbstractBundlePersistenceManager.MISSING is too low
Key: JCR-3374
URL: https://issues.apache.org/jira/browse/JCR-3374
Project: Jackrabbit Content Repository
Issue Type: Bug
Components: jackrabbit-core
Affects Versions: 2.5, 2.4, 2.3, 2.2, 2.1.2, 2.0.3
Reporter: Marcel Reutegger
Priority: Minor
A heap dump from a Jackrabbit 2.2 based system recently showed that the
ConcurrentCache of the bundle persistence managers used a lot more memory than
configured. One of them used 10 times the configured bundle size.
It turned out that the majority of the cache entries referenced
AbstractBundlePersistenceManager.MISSING. The size estimate of 16 bytes is too
low and does not account for the overhead that comes with the internal
LinkedHashMap of the ConcurrentCache.
I think a more sensible value is 128 bytes, which is the sum of:
- 32 bytes for ConcurrentCache.E
- 64 bytes for LinkedHashMap.Entry
- 32 bytes for NodeId
The unified cache, which also includes missing NodePropBundle entries was
introduced with JCR-2699.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
