Jim Paton 9700677a2b Slow down writes gradually rather than suddenly ... Summary: Currently, when a certain number of level0 files (level0_slowdown_writes_trigger) are present, RocksDB will slow down each write by 1ms. There is a second limit of level0 files at which RocksDB will stop writes altogether (level0_stop_writes_trigger). This patch enables the user to supply a third parameter specifying the number of files at which Rocks will start slowing down writes (level0_start_slowdown_writes). When this number is reached, Rocks will slow down writes as a quadratic function of level0_slowdown_writes_trigger - num_level0_files. For some workloads, this improves latency and throughput. I will post some stats momentarily in https://our.intern.facebook.com/intern/tasks/?t=2613384. Test Plan: make -j32 check ./db_stress ./db_bench Reviewers: dhruba, haobo, MarkCallaghan, xjin Reviewed By: xjin CC: leveldb, xjin, zshao Differential Revision: https://reviews.facebook.net/D11859		2013-07-31 16:20:48 -07:00
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arena.h	Make arena block size configurable	2013-07-31 12:42:23 -07:00
c.h
cache.h	Codemod NULL to nullptr	2013-02-28 18:04:58 -08:00
compaction_filter.h	[RocksDB] Cleanup compaction filter to use a class interface, instead of function pointer and additional context pointer.	2013-05-13 14:06:10 -07:00
comparator.h
db.h	Use KeyMayExist for WriteBatch-Deletes	2013-07-23 13:36:50 -07:00
env.h	[RocksDB] Option for incremental sync	2013-06-18 15:00:32 -07:00
filter_policy.h
iterator.h
ldb_tool.h	[RocksDB] Expose LDB functioanality as a library call - clients can build their own LDB binary with additional options	2013-04-11 20:21:49 -07:00
memtablerep.h	Make arena block size configurable	2013-07-31 12:42:23 -07:00
merge_operator.h	[Rocksdb] Support Merge operation in rocksdb	2013-05-03 16:59:02 -07:00
options.h	Slow down writes gradually rather than suddenly	2013-07-31 16:20:48 -07:00
slice.h
statistics.h	Add stall counts to statistics	2013-07-29 10:34:23 -07:00
status.h	[Rocksdb] Support Merge operation in rocksdb	2013-05-03 16:59:02 -07:00
table_builder.h
transaction_log_iterator.h	Do not allow Transaction Log Iterator to fall ahead when writer is writing the same file	2013-03-06 14:05:53 -08:00
types.h
write_batch.h	[RocksDB] Expose count for WriteBatch	2013-06-26 15:13:21 -07:00