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Posted to oak-issues@jackrabbit.apache.org by "Thomas Mueller (JIRA)" <ji...@apache.org> on 2014/02/04 11:08:08 UTC

[jira] [Created] (OAK-1383) Reduce memory usage of the cache

Thomas Mueller created OAK-1383:
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             Summary: Reduce memory usage of the cache
                 Key: OAK-1383
                 URL: https://issues.apache.org/jira/browse/OAK-1383
             Project: Jackrabbit Oak
          Issue Type: Bug
            Reporter: Thomas Mueller
            Assignee: Thomas Mueller


The LIRS cache calculates the estimated number of cells using the cache size and the average entry size, and allocates empty arrays accordingly.

Currently, the LIRS cache uses a default entry size of 100 bytes, which is relatively low. Because of that, even an empty cache needs quite a lot of memory.

I found the average size of the entries is around 2000 for our unit tests. Using this average size should reduce memory usage a lot.



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