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https://issues.apache.org/jira/browse/OAK-11687?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Thomas Mueller reassigned OAK-11687:
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Assignee: Thomas Mueller
> DataStore FileCache Memory Usage
> --------------------------------
>
> Key: OAK-11687
> URL: https://issues.apache.org/jira/browse/OAK-11687
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Reporter: Thomas Mueller
> Assignee: Thomas Mueller
> Priority: Major
>
> If there are many small files in the datastore cache, then the FileCache can
> use a lot of Java heap memory. This is caused by:
> * Entries smaller than 4096 bytes report memory usage of 0 to the cache.
> * Each entry is a java.io.File, which contains the full path.
> This can lead eg. to 1 GB of memory usage if there are many small files,
> which is unexpected.
> To reduce memory usage, I think it makes sense to use just the String as the
> key as well as the value. It will still not fully resolve the issue, but at
> least it reduces the memory usage. Better yet would probably be to limit the
> memory usage as well.
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