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Type: Bug
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Resolution: Gone away
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Priority: Minor - P4
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None
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Affects Version/s: None
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Component/s: None
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None
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Query Optimization
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ALL
Currently, it is possible for a time-series collection to not be clustered by _id, either by the (undocumented) timeseriesBucketsCollectionClusterById server parameter or if using a storage engine that doesn't support clustered indexes, like ephemeralForTest.
When this is the case, any queries on the time field appear to use the _id index, even if there is also an index on the time field. See this test.
- related to
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SERVER-57694 Complete TODO listed in SERVER-56238
- Closed
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SERVER-55664 Support clustered _id indexes in ephemeralForTest
- Closed