Doing point queries on the ts field is slow in the oplog because the oplog does not have any indexes. WT has a hack that allows it to do binary search on the ts field but is only enabled when the query predicate has top level $gt/$gte.
This is needed by retryable writes in order to do fast lookup on oplog entries when traversing through the write history within a transaction.
- is depended on by
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SERVER-31863 Make TransactionHistoryIterator use oplogHack
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- Closed
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- is documented by
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DOCS-11002 Make oplog queries with point equality on ts field use getOplogStartHack (SERVER-29843)
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- Closed
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- is duplicated by
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SERVER-31687 Missing minvalid in sync source cause oplog full table scan all the time
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- Closed
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- is related to
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- Closed
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