akankshamahajan 5b5b011cdd Avoid double block cache lookup during Seek with async_io option (#11616) ... Summary: With the async_io option, the Seek happens in 2 phases. Phase 1 starts an asynchronous read on a block cache miss, and phase 2 waits for it to complete and finishes the seek. In both phases, BlockBasedTable::NewDataBlockIterator is called, which tries to lookup the block cache for the data block first before looking in the prefetch buffer. It's optimized by doing the block cache lookup only in the first phase and save some CPU. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11616 Test Plan: Added unit test Reviewed By: jaykorean Differential Revision: D47477887 Pulled By: akankshamahajan15 fbshipit-source-id: 0355e0a68fc0ea2eb92340ae42735afcdbcbfd79		2023-09-18 11:32:30 -07:00
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.gitkeep	Some fixes to unreleased_history/ (#11504)	2023-06-02 15:55:02 -07:00
avoid_double_lookup.md	Avoid double block cache lookup during Seek with async_io option (#11616)	2023-09-18 11:32:30 -07:00