fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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sdong 6797e6ffac Avoid updating memtable allocated bytes if write_buffer_size is not set ... Summary: If options.write_buffer_size is not set, nor options.write_buffer_manager, no need to update the bytes allocated counter in MemTableAllocator, which is expensive in parallel memtable insert case. Remove it can improve parallel memtable insert throughput by 10% with write batch size 128. Test Plan: Run benchmarks TEST_TMPDIR=/dev/shm/ ./db_bench --benchmarks=fillrandom -disable_auto_compactions -level0_slowdown_writes_trigger=9999 -level0_stop_writes_trigger=9999 -num=10000000 --writes=1000000 -max_background_flushes=16 -max_write_buffer_number=16 --threads=32 --batch_size=128 -allow_concurrent_memtable_write -enable_write_thread_adaptive_yield The throughput grows 10% with the benchmark. Reviewers: andrewkr, yiwu, IslamAbdelRahman, igor, ngbronson Reviewed By: ngbronson Subscribers: ngbronson, leveldb, andrewkr, dhruba Differential Revision: https://reviews.facebook.net/D60465		8 years ago
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rocksdb	Avoid updating memtable allocated bytes if write_buffer_size is not set	8 years ago