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efd013d6d8
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Jay Edgar efd013d6d8 Miscellaneous performance improvements 
Summary:
I was investigating performance issues in the SstFileWriter and found all of the following:

- The SstFileWriter::Add() function created a local InternalKey every time it was called generating a allocation and free each time.  Changed to have an InternalKey member variable that can be reset with the new InternalKey::Set() function.
- In SstFileWriter::Add() the smallest_key and largest_key values were assigned the result of a ToString() call, but it is simpler to just assign them directly from the user's key.
- The Slice class had no move constructor so each time one was returned from a function a new one had to be allocated, the old data copied to the new, and the old one was freed.  I added the move constructor which also required a copy constructor and assignment operator.
- The BlockBuilder::CurrentSizeEstimate() function calculates the current estimate size, but was being called 2 or 3 times for each key added.  I changed the class to maintain a running estimate (equal to the original calculation) so that the function can return an already calculated value.
- The code in BlockBuilder::Add() that calculated the shared bytes between the last key and the new key duplicated what Slice::difference_offset does, so I replaced it with the standard function.
- BlockBuilder::Add() had code to copy just the changed portion into the last key value (and asserted that it now matched the new key).  It is more efficient just to copy the whole new key over.
- Moved this same code up into the 'if (use_delta_encoding_)' since the last key value is only needed when delta encoding is on.
- FlushBlockBySizePolicy::BlockAlmostFull calculated a standard deviation value each time it was called, but this information would only change if block_size of block_size_deviation changed, so I created a member variable to hold the value to avoid the calculation each time.
- Each PutVarint??() function has a buffer and calls std::string::append().  Two or three calls in a row could share a buffer and a single call to std::string::append().

Some of these will be helpful outside of the SstFileWriter.  I'm not 100% the addition of the move constructor is appropriate as I wonder why this wasn't done before - maybe because of compiler compatibility?  I tried it on gcc 4.8 and 4.9.

Test Plan: The changes should not affect the results so the existing tests should all still work and no new tests were added.  The value of the changes was seen by manually testing the SstFileWriter class through MyRocks and adding timing code to identify problem areas.

Reviewers: sdong, IslamAbdelRahman

Reviewed By: IslamAbdelRahman

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D59607
2016-07-12 14:15:32 -07:00
..
auto_roll_logger_test.cc Cleanup auto-roll logger flush-while-rolling test 2016-07-07 11:35:40 -07:00
auto_roll_logger.cc Eliminate use of 'using namespace std'. Also remove a number of ADL references to std functions. 2016-05-20 07:42:18 -07:00
auto_roll_logger.h Redo SyncPoints for flush while rolling test 2016-02-22 21:32:19 -08:00
builder.cc [rocksdb] make more options dynamic 2016-05-17 13:11:56 -07:00
builder.h [rocksdb] make more options dynamic 2016-05-17 13:11:56 -07:00
c_test.c Shared dictionary compression using reference block 2016-04-27 17:36:03 -07:00
c.cc Deprectate filter_deletes 2016-06-17 10:30:47 -07:00
column_family_test.cc Add More Logging to track total_log_size 2016-07-06 14:29:18 -07:00
column_family.cc Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
column_family.h Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
compact_files_test.cc Fixed CompactFiles() spuriously failing or corrupting DB 2016-02-22 13:54:58 -08:00
compacted_db_impl.cc CompactedDB should not be used if there is outstanding WAL files 2016-04-26 14:22:07 -07:00
compacted_db_impl.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
compaction_iterator_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
compaction_iterator.cc Fixing snapshot 0 assertion 2016-04-16 01:47:15 -07:00
compaction_iterator.h Fix data race issue when sub-compaction is used in CompactionJob 2016-03-24 19:36:39 -07:00
compaction_job_stats_test.cc Introduce XPRESS compresssion on Windows. (#1081) 2016-04-19 22:54:24 -07:00
compaction_job_test.cc Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
compaction_job.cc [rocksdb] make more options dynamic 2016-05-17 13:11:56 -07:00
compaction_job.h [rocksdb] make more options dynamic 2016-05-17 13:11:56 -07:00
compaction_picker_test.cc Clean up the ComputeCompactionScore() API 2016-05-23 15:55:29 -07:00
compaction_picker.cc Update DBTestUniversalCompaction.UniversalCompactionSingleSortedRun to use max_size_amplification_percent = 0 2016-06-27 15:19:27 -07:00
compaction_picker.h [rocksdb] make more options dynamic 2016-05-17 13:11:56 -07:00
compaction.cc Update DB::AddFile() to ingest the file to the lowest possible level 2016-06-21 17:57:59 -07:00
compaction.h Update DB::AddFile() to ingest the file to the lowest possible level 2016-06-21 17:57:59 -07:00
comparator_db_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
convenience.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
corruption_test.cc Change several option defaults 2016-04-28 17:50:58 -07:00
cuckoo_table_db_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
db_block_cache_test.cc add option to not flush memtable on open() 2016-06-13 11:34:16 -07:00
db_bloom_filter_test.cc Deprectate filter_deletes 2016-06-17 10:30:47 -07:00
db_compaction_filter_test.cc Change some RocksDB default options 2016-03-31 17:12:18 -07:00
db_compaction_test.cc Add a new feature to enforce a sync point only active on a thread 2016-07-07 11:29:14 -07:00
db_dynamic_level_test.cc Fix flaky DBTestDynamicLevel.DynamicLevelMaxBytesBase2 2016-05-26 10:13:24 -07:00
db_filesnapshot.cc Backup Options 2016-06-09 19:03:10 -07:00
db_impl_add_file.cc update DB::AddFile to ingest list of sst files 2016-07-11 10:43:12 -07:00
db_impl_debug.cc [rocksdb] make more options dynamic 2016-05-17 13:11:56 -07:00
db_impl_experimental.cc Clean up the ComputeCompactionScore() API 2016-05-23 15:55:29 -07:00
db_impl_readonly.cc Add Iterator Property rocksdb.iterator.version_number 2016-03-02 16:23:59 -08:00
db_impl_readonly.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
db_impl.cc update DB::AddFile to ingest list of sst files 2016-07-11 10:43:12 -07:00
db_impl.h update DB::AddFile to ingest list of sst files 2016-07-11 10:43:12 -07:00
db_info_dumper.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
db_info_dumper.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
db_inplace_update_test.cc Change some RocksDB default options 2016-03-31 17:12:18 -07:00
db_io_failure_test.cc Move IO failure test to separate file 2016-05-18 17:09:20 -07:00
db_iter_test.cc Add Iterator Property rocksdb.iterator.version_number 2016-03-02 16:23:59 -08:00
db_iter.cc Reuse TimedFullMerge instead of FullMerge + instrumentation 2016-06-13 16:17:26 -07:00
db_iter.h Introduce PinnedIteratorsManager (Reduce PinData() overhead / Refactor PinData) 2016-04-26 12:41:07 -07:00
db_iterator_test.cc Fix win build 2016-05-09 11:52:28 -07:00
db_log_iter_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
db_properties_test.cc Miscellaneous performance improvements 2016-07-12 14:15:32 -07:00
db_sst_test.cc fix test failure 2016-07-11 13:33:52 -07:00
db_table_properties_test.cc Embed column family name in SST file 2016-04-06 23:10:32 -07:00
db_tailing_iter_test.cc Change Property name from "rocksdb.current_version_number" to "rocksdb.current-super-version-number" 2016-03-04 18:15:29 -08:00
db_test2.cc Add a new feature to enforce a sync point only active on a thread 2016-07-07 11:29:14 -07:00
db_test_util.cc update DB::AddFile to ingest list of sst files 2016-07-11 10:43:12 -07:00
db_test_util.h Update DB::AddFile() to ingest the file to the lowest possible level 2016-06-21 17:57:59 -07:00
db_test.cc update DB::AddFile to ingest list of sst files 2016-07-11 10:43:12 -07:00
db_universal_compaction_test.cc Update DBTestUniversalCompaction.UniversalCompactionSingleSortedRun to use max_size_amplification_percent = 0 2016-06-27 15:19:27 -07:00
db_wal_test.cc Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
dbformat_test.cc Improve BytewiseComparatorImpl::FindShortestSeparator 2016-04-25 23:02:14 -07:00
dbformat.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
dbformat.h Miscellaneous performance improvements 2016-07-12 14:15:32 -07:00
deletefile_test.cc Fix a bug that accesses invalid address in iterator cleanup function 2016-07-05 11:57:14 -07:00
event_helpers.cc Added EventListener::OnTableFileCreationStarted() callback 2016-04-29 11:35:00 -07:00
event_helpers.h Added EventListener::OnTableFileCreationStarted() callback 2016-04-29 11:35:00 -07:00
experimental.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
fault_injection_test.cc [rocksdb] Recovery path sequence miscount fix 2016-05-10 14:06:07 -07:00
file_indexer_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
file_indexer.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
file_indexer.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
filename_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
filename.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
filename.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
flush_job_test.cc Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
flush_job.cc Fix clang analyzer errors 2016-07-08 17:50:51 -07:00
flush_job.h Rename options.compaction_measure_io_stats to options.report_bg_io_stats and include flush too. 2016-04-15 10:22:18 -07:00
flush_scheduler.cc Fix clang analyzer errors 2016-07-08 17:50:51 -07:00
flush_scheduler.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
forward_iterator_bench.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
forward_iterator.cc Change Property name from "rocksdb.current_version_number" to "rocksdb.current-super-version-number" 2016-03-04 18:15:29 -08:00
forward_iterator.h Add Iterator Property rocksdb.iterator.version_number 2016-03-02 16:23:59 -08:00
inlineskiplist_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
inlineskiplist.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
internal_stats.cc Add InternalStats and logging for AddFile() 2016-06-16 16:21:41 -07:00
internal_stats.h Add InternalStats and logging for AddFile() 2016-06-16 16:21:41 -07:00
job_context.h Add More Logging to track total_log_size 2016-07-06 14:29:18 -07:00
listener_test.cc Add a callback for when memtable is moved to immutable (#1137) 2016-06-02 11:57:31 -07:00
log_format.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
log_reader.cc Fix clang analyzer errors 2016-07-08 17:50:51 -07:00
log_reader.h db/log_reader: treat bad record length or checksum as EOF 2016-05-22 22:00:15 -07:00
log_test.cc db/log_reader: treat bad record length or checksum as EOF 2016-05-22 22:00:15 -07:00
log_writer.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
log_writer.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
managed_iterator.cc Fixes warnings and ensure correct int behavior on 32-bit platforms. 2016-03-16 22:57:57 +01:00
managed_iterator.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
manual_compaction_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
memtable_allocator.cc Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
memtable_allocator.h Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
memtable_list_test.cc Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
memtable_list.cc group multiple batch of flush into one manifest file (one call to LogAndApply) 2016-07-05 18:09:59 -07:00
memtable_list.h [rocksdb] Memtable Log Referencing and Prepared Batch Recovery 2016-05-10 14:06:07 -07:00
memtable.cc Concurrent memtable inserter to update counters and flush state after all inserts 2016-07-08 10:19:55 -07:00
memtable.h Concurrent memtable inserter to update counters and flush state after all inserts 2016-07-08 10:19:55 -07:00
memtablerep_bench.cc Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
merge_context.h Eliminate std::deque initialization while iterating over merge operands 2016-04-01 15:48:55 -07:00
merge_helper_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
merge_helper.cc Fix clang analyzer errors 2016-07-08 17:50:51 -07:00
merge_helper.h Reuse TimedFullMerge instead of FullMerge + instrumentation 2016-06-13 16:17:26 -07:00
merge_operator.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
merge_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
options_file_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
perf_context_test.cc CompactedDB should not be used if there is outstanding WAL files 2016-04-26 14:22:07 -07:00
pinned_iterators_manager.h Introduce PinnedIteratorsManager (Reduce PinData() overhead / Refactor PinData) 2016-04-26 12:41:07 -07:00
plain_table_db_test.cc Embed column family name in SST file 2016-04-06 23:10:32 -07:00
prefix_test.cc memtable_prefix_bloom_bits -> memtable_prefix_bloom_bits_ratio and deprecate memtable_prefix_bloom_probes 2016-06-10 12:12:10 -07:00
repair_test.cc ColumnFamilyOptions API [CF + RepairDB part 3/3] 2016-06-24 16:29:43 -07:00
repair.cc Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
skiplist_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
skiplist.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
snapshot_impl.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
snapshot_impl.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
table_cache.cc Enable configurable readahead for iterators 2016-05-04 15:25:58 -07:00
table_cache.h Enable configurable readahead for iterators 2016-05-04 15:25:58 -07:00
table_properties_collector_test.cc Added "number of merge operands" to statistics in ssts. 2016-05-19 14:24:48 -07:00
table_properties_collector.cc Added "number of merge operands" to statistics in ssts. 2016-05-19 14:24:48 -07:00
table_properties_collector.h Added "number of merge operands" to statistics in ssts. 2016-05-19 14:24:48 -07:00
transaction_log_impl.cc Eliminate use of 'using namespace std'. Also remove a number of ADL references to std functions. 2016-05-20 07:42:18 -07:00
transaction_log_impl.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
version_builder_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
version_builder.cc Adding pin_l0_filter_and_index_blocks_in_cache feature and related fixes. 2016-04-01 10:42:39 -07:00
version_builder.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
version_edit_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
version_edit.cc Miscellaneous performance improvements 2016-07-12 14:15:32 -07:00
version_edit.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
version_set_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
version_set.cc Fix clang analyzer errors 2016-07-08 17:50:51 -07:00
version_set.h Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
wal_manager_test.cc Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
wal_manager.cc In all the places where log records are read, there was a check that 2016-03-30 23:05:22 +05:30
wal_manager.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
write_batch_base.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
write_batch_internal.h Deprectate filter_deletes 2016-06-17 10:30:47 -07:00
write_batch_test.cc Add options.write_buffer_manager: control total memtable size across DB instances 2016-07-05 18:11:25 -07:00
write_batch.cc Concurrent memtable inserter to update counters and flush state after all inserts 2016-07-08 10:19:55 -07:00
write_callback_test.cc write_callback_test: clean test directory before running tests 2016-04-18 10:18:41 -07:00
write_callback.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
write_controller_test.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
write_controller.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
write_controller.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
write_thread.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
write_thread.h fix simple typos (#1183) 2016-06-25 08:29:40 +01:00
xfunc_test_points.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
xfunc_test_points.h Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00