From: Levi Tamasi <ltamasi@fb.com>
Date: Mon, 16 Dec 2019 23:15:42 +0000 (-0800)
Subject: Update HISTORY.md with the recent memtable trimming fixes
X-Git-Tag: v6.5.3~1
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=e7d7b1075ea495db627f74b3f8d02eb473800508;p=rocksdb.git

Update HISTORY.md with the recent memtable trimming fixes

Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/6194

Differential Revision: D19125292

Pulled By: ltamasi

fbshipit-source-id: d41aca2755ec4bec07feedd6b561e8d18606a931
---

diff --git a/HISTORY.md b/HISTORY.md
index d9cc3b3a..3ea00675 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,5 +1,7 @@
 # Rocksdb Change Log
-## Unreleased
+## 6.5.3 (1/10/2020)
+### Bug Fixes
+* Fixed two performance issues related to memtable history trimming. First, a new SuperVersion is now created only if some memtables were actually trimmed. Second, trimming is only scheduled if there is at least one flushed memtable that is kept in memory for the purposes of transaction conflict checking.
 
 ## 6.5.2 (11/15/2019)
 ### Bug Fixes