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Update HISTORY.md with recent BlobDB related changes

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Levi Tamasi 2019-12-16 14:09:03 -08:00
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HISTORY.md
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@ -3,6 +3,7 @@
### Bug Fixes
* Fix a bug in WriteBatchWithIndex::MultiGetFromBatchAndDB, which is called by Transaction::MultiGet, that causes due to stale pointer access when the number of keys is > 32
* 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.
* BlobDB no longer updates the SST to blob file mapping upon failed compactions.
## 6.6.0 (11/25/2019)
### Bug Fixes