Details
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New Feature
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Resolution: Duplicate
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Major - P3
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None
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None
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Description
In order to assist our users with WT cache sizing, we need a way to gather information about memory pages currently in the cache, specifically which namespaces/indexes they belong to and their size, so that a working set estimation can be performed, e.g.:
"test.test" : {
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cached_pages: 54
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cached_size: 23456
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},
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"test.test._id_" : {
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cached_pages: 5
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cached_size: 1234
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}
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This statistic can be approximate and I think it only needs to be executed ad-hoc, but it must not noticeably disrupt ongoing database operations.
Attachments
Issue Links
- duplicates
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WT-2729 Focus eviction walks in largest trees
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- Closed
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- is depended on by
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WT-2446 Estimate WT cache hit ratio
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- Closed
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- related to
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SERVER-21448 Working set estimation WT
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- Backlog
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