Update HISTORY.md and version.h 6.22 release (#8427)

Summary: Pull Request resolved: https://github.com/facebook/rocksdb/pull/8427

Reviewed By: zhichao-cao

Differential Revision: D29246916

Pulled By: ajkr

fbshipit-source-id: ccd44ca1a6dd5101dc37f19b8e1fe6c0e3883e0a
This commit is contained in:
Andrew Kryczka 2021-06-19 12:11:44 -07:00 committed by Facebook GitHub Bot
parent 19a89267ca
commit 7ed69fbe72
2 changed files with 2 additions and 2 deletions

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# Rocksdb Change Log
## Unreleased
## 6.22.0 (2021-06-18)
### Behavior Changes
* Added two additional tickers, MEMTABLE_PAYLOAD_BYTES_AT_FLUSH and MEMTABLE_GARBAGE_BYTES_AT_FLUSH. These stats can be used to estimate the ratio of "garbage" (outdated) bytes in the memtable that are discarded at flush time.
* Added API comments clarifying safe usage of Disable/EnableManualCompaction and EventListener callbacks for compaction.

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#include "rocksdb/rocksdb_namespace.h"
#define ROCKSDB_MAJOR 6
#define ROCKSDB_MINOR 21
#define ROCKSDB_MINOR 22
#define ROCKSDB_PATCH 0
// Do not use these. We made the mistake of declaring macros starting with