Details
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Bug
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Resolution: Done
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Major - P3
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None
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None
Description
For performance reasons, the "snapshot" query option was changed in 3.2 to force a collection scan (instead of forcing an _id index scan) when used against a server configured with the WiredTiger storage engine. This was changed as part of SERVER-19593.
The cursor.snapshot() documentation should be updated to remove the reference to the _id index (however, the "snapshot" query option remains incompatible with sorts and hints).
Attachments
Issue Links
- related to
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SERVER-19593 Allow collscans on $snapshot queries when not using MMAP1
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- Closed
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