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author	Andrew Kryczka <andrewkr@fb.com>
	Sat, 19 Nov 2016 22:14:35 +0000 (14:14 -0800)
committer	Facebook Github Bot <facebook-github-bot-bot@fb.com>
	Sat, 19 Nov 2016 22:24:12 +0000 (14:24 -0800)
commit	fe349db57b3f3ec817324912996cddd37cf80405
tree	8d26e86a6eb96b81f7f17b7b790a4e8d6195c893	tree \| snapshot
parent	e63350e726d62144037d889c348cf007deda7a80	commit \| diff

Remove Arena in RangeDelAggregator

Summary:
The Arena construction/destruction introduced significant overhead to read-heavy workload just by creating empty vectors for its blocks, so avoid it in RangeDelAggregator.
Closes https://github.com/facebook/rocksdb/pull/1547

Differential Revision: D4207781

Pulled By: ajkr

fbshipit-source-id: 9d1c130

12 files changed:

db/builder.cc		diff \| blob \| history
db/builder.h		diff \| blob \| history
db/db_impl.cc		diff \| blob \| history
db/flush_job.cc		diff \| blob \| history
db/memtable.cc		diff \| blob \| history
db/memtable.h		diff \| blob \| history
db/memtable_list.cc		diff \| blob \| history
db/range_del_aggregator.cc		diff \| blob \| history
db/range_del_aggregator.h		diff \| blob \| history
db/repair.cc		diff \| blob \| history
db/write_batch_test.cc		diff \| blob \| history
table/table_test.cc		diff \| blob \| history

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