From 98942a297d5d84a0816ed08ed6615455dc500b70 Mon Sep 17 00:00:00 2001
From: Levi Tamasi <ltamasi@fb.com>
Date: Mon, 7 Feb 2022 10:24:25 -0800
Subject: [PATCH] Update HISTORY for PR 9504 (#9513)

Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/9513

Reviewed By: riversand963

Differential Revision: D34046181

Pulled By: ltamasi

fbshipit-source-id: a5d8d3bf84e5c13bdc6cbd5ba1b4216bad9adfc5
---
 HISTORY.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/HISTORY.md b/HISTORY.md
index 226956e08..99338cba5 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -4,6 +4,9 @@
 * Fixed a major bug in which batched MultiGet could return old values for keys deleted by DeleteRange when memtable Bloom filter is enabled (memtable_prefix_bloom_size_ratio > 0). (The fix includes a substantial MultiGet performance improvement in the unusual case of both memtable_whole_key_filtering and prefix_extractor.)
 * Fixed more cases of EventListener::OnTableFileCreated called with OK status, file_size==0, and no SST file kept. Now the status is Aborted.
 
+### Performance Improvements
+* Mitigated the overhead of building the file location hash table used by the online LSM tree consistency checks, which can improve performance for certain workloads (see #9351).
+
 ### Public API changes
 * Require C++17 compatible compiler (GCC >= 7, Clang >= 5, Visual Studio >= 2017). See #9388.
 * Remove HDFS support from main repo.