-
Type: Bug
-
Resolution: Done
-
Priority: Major - P3
-
Affects Version/s: None
-
Component/s: manual
-
Labels:None
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).
- related to
-
SERVER-19593 Allow collscans on $snapshot queries when not using MMAP1
- Closed