While retryable writes works in MMAPV1, due to the collection-level locking its performance is so bad that it cannot be used in practice. Because of this, we should disable retryable writes if StorageEngine::supportsDocLocking() == false.
The effective behaviour should be that if the storage engine doesn't support document-level locking, any requests which include a txnNumber should fail with code UnsupportedOperation.
- is documented by
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DOCS-11039 Docs for SERVER-31941: Disallow retryable writes in storage engines which do not support document-level locking
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- Closed
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- is related to
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SERVER-31845 WT performance regression with write retryability enabled
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- Closed
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