[jira] [Created] (LUCENE-5695) Add DocIdSet.ramBytesUsed

["Adrien Grand (JIRA)" <ji...@apache.org>]

Adrien Grand created LUCENE-5695:
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             Summary: Add DocIdSet.ramBytesUsed
                 Key: LUCENE-5695
                 URL: https://issues.apache.org/jira/browse/LUCENE-5695
             Project: Lucene - Core
          Issue Type: New Feature
    Affects Versions: 4.9, 5.0
            Reporter: Adrien Grand
            Assignee: Adrien Grand
            Priority: Minor


LUCENE-5463 tried to remove calls to {{RamUsageEstimator.sizeOf(Object)}} yet it was not always possible to remove the call when there was no other API to compute the memory usage of a particular class. In particular, this is the case for {{CachingWrapperFilter.sizeInBytes()}} that needs to be able to get the memory usage of any cacheable {{DocIdSet}} instance.

We could add {{DocIdSet.ramBytesUsed}} in order to remove the need for {{RamUsageEstimator}}. This will also help have bounded filter caches and take the size of the cached doc id sets into account when doing evictions.



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