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Type: Improvement
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Resolution: Done
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Priority: Major - P3
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Affects Version/s: None
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Component/s: Querying
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Fully Compatible
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Query 10 (02/22/16)
The index scan stage should track the number of calls to BtreeIndexCursor::skip() made here:
https://github.com/mongodb/mongo/blob/r3.0.0-rc6/src/mongo/db/exec/index_scan.cpp#L438-L439
Original Description
Currently nscanned isn't precise enough to distinguish between unindexed traversal and btree traversal, and in some cases between btree skipping and inorder order btree traversal.
- is related to
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SERVER-3414 consider using nscannedObjects in addition to nscanned when selecting a query plan
- Closed
- related to
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SERVER-10448 Revamp explain() formatting
- Closed