80ade9ad83
Summary: Top-level index in partitioned index/filter blocks are small and could be pinned in memory. So far we use that by cache_index_and_filter_blocks to false. This however make it difficult to keep account of the total memory usage. This patch introduces pin_top_level_index_and_filter which in combination with cache_index_and_filter_blocks=true keeps the top-level index in cache and yet pinned them to avoid cache misses and also cache lookup overhead. Closes https://github.com/facebook/rocksdb/pull/4037 Differential Revision: D8596218 Pulled By: maysamyabandeh fbshipit-source-id: 3a5f7f9ca6b4b525b03ff6bd82354881ae974ad2 |
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