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Siying Dong fbbf0d1456 Pre-calculate whether to slow down for too many level 0 files 
Summary: Currently in DBImpl::MakeRoomForWrite(), we do  "versions_->NumLevelFiles(0) >= options_.level0_slowdown_writes_trigger" to check whether the writer thread needs to slow down. However, versions_->NumLevelFiles(0) is slightly more expensive than we expected. By caching the result of the comparison when installing a new version, we can avoid this function call every time.

Test Plan:
make all check
Manually trigger this behavior by applying universal compaction style and make sure inserts are made slow after there are certain number of files.

Reviewers: haobo, kailiu, igor

Reviewed By: kailiu

CC: nkg-, leveldb

Differential Revision: https://reviews.facebook.net/D15141
2014-01-14 11:23:02 -08:00
..
builder.cc Don't always compress L0 files written by memtable flush 2014-01-07 21:50:26 -08:00
builder.h Don't always compress L0 files written by memtable flush 2014-01-07 21:50:26 -08:00
c_test.c Rename leveldb to rocksdb in C api 2013-12-10 10:48:35 +02:00
c.cc C API: add rocksdb_env_set_high_priority_background_threads 2013-12-31 15:14:18 -08:00
corruption_test.cc Make "Table" pluggable 2013-10-28 17:54:09 -07:00
db_bench.cc Improve RocksDB "get" performance by computing merge result in memtable 2014-01-10 17:33:56 -08:00
db_filesnapshot.cc Support multi-threaded DisableFileDeletions() and EnableFileDeletions() 2014-01-02 03:33:42 -08:00
db_impl_readonly.cc Introduce MergeContext to Lazily Initialize merge operand list 2013-12-11 11:37:28 -08:00
db_impl_readonly.h Support multi-threaded DisableFileDeletions() and EnableFileDeletions() 2014-01-02 03:33:42 -08:00
db_impl.cc Pre-calculate whether to slow down for too many level 0 files 2014-01-14 11:23:02 -08:00
db_impl.h Don't always compress L0 files written by memtable flush 2014-01-07 21:50:26 -08:00
db_iter.cc Get rid of some shared_ptrs 2013-12-03 11:17:58 -08:00
db_iter.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
db_statistics.cc Fix #26 by putting the implementation of CreateDBStatistics() to a cc file 2013-12-05 22:29:03 -08:00
db_statistics.h Fix #26 by putting the implementation of CreateDBStatistics() to a cc file 2013-12-05 22:29:03 -08:00
db_stats_logger.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
db_test.cc Support multi-threaded DisableFileDeletions() and EnableFileDeletions() 2014-01-02 03:33:42 -08:00
dbformat_test.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
dbformat.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
dbformat.h Make "Table" pluggable 2013-10-28 17:54:09 -07:00
deletefile_test.cc Start DeleteFileTest with clean plate 2013-11-15 16:30:23 -08:00
filename_test.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
filename.cc Unify DeleteFile and DeleteWalFiles 2013-10-25 08:32:14 -07:00
filename.h Unify DeleteFile and DeleteWalFiles 2013-10-25 08:32:14 -07:00
log_format.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
log_reader.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
log_reader.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
log_test.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
log_writer.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
log_writer.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
memtable.cc Improve RocksDB "get" performance by computing merge result in memtable 2014-01-10 17:33:56 -08:00
memtable.h Improve RocksDB "get" performance by computing merge result in memtable 2014-01-10 17:33:56 -08:00
memtablelist.cc Introduce MergeContext to Lazily Initialize merge operand list 2013-12-11 11:37:28 -08:00
memtablelist.h Introduce MergeContext to Lazily Initialize merge operand list 2013-12-11 11:37:28 -08:00
merge_context.h Introduce MergeContext to Lazily Initialize merge operand list 2013-12-11 11:37:28 -08:00
merge_helper.cc [RocksDB] Use raw pointer instead of shared pointer when passing Statistics object internally 2013-11-25 10:38:15 -08:00
merge_helper.h [RocksDB] Use raw pointer instead of shared pointer when passing Statistics object internally 2013-11-25 10:38:15 -08:00
merge_operator.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
merge_test.cc Use ASSERT_EQ() instead of assert() in merge_test 2014-01-11 09:25:47 -08:00
perf_context_test.cc Killing Transform Rep 2013-12-03 12:42:15 -08:00
prefix_filter_iterator.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
prefix_test.cc Killing Transform Rep 2013-12-03 12:42:15 -08:00
repair.cc Don't always compress L0 files written by memtable flush 2014-01-07 21:50:26 -08:00
simple_table_db_test.cc Improve the "table stats" 2013-11-19 16:29:42 -08:00
skiplist_test.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
skiplist.h Implementing DynamicIterator for TransformRepNoLock 2013-11-08 00:31:09 -08:00
snapshot.h Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
table_cache.cc Hotfix the bug in table cache's GetSliceForFileNumber 2014-01-02 10:30:42 -08:00
table_cache.h Follow-up Cleaning-up After D13521 2013-10-30 10:52:33 -07:00
table_properties_collector_test.cc Move flush_block_policy from Options to TableFactory 2013-11-19 22:00:48 -08:00
table_properties_collector.cc Improve the readability of the TableProperties::ToString() 2013-11-21 17:54:23 -08:00
table_properties_collector.h Improve the "table stats" 2013-11-19 16:29:42 -08:00
transaction_log_impl.cc Fix the string format issue 2013-11-12 21:05:39 -08:00
transaction_log_impl.h Making the transaction log iterator more robust 2013-11-04 20:49:03 -08:00
version_edit_test.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
version_edit.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
version_edit.h Fix the log number bug when updating MANIFEST file 2013-10-24 21:05:33 -07:00
version_set_reduce_num_levels.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
version_set_test.cc Add appropriate LICENSE and Copyright message. 2013-10-16 17:48:41 -07:00
version_set.cc Pre-calculate whether to slow down for too many level 0 files 2014-01-14 11:23:02 -08:00
version_set.h Pre-calculate whether to slow down for too many level 0 files 2014-01-14 11:23:02 -08:00
write_batch_internal.h In-place updates for equal keys and similar sized values 2013-10-31 11:27:12 -07:00
write_batch_test.cc Get rid of some shared_ptrs 2013-12-03 11:17:58 -08:00
write_batch.cc DB::Put() to estimate write batch data size needed and pre-allocate buffer 2014-01-14 10:53:16 -08:00