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Andrew Kryczka ed0a4c93ef perf_context measure user bytes read 
Summary:
With this PR, we can measure read-amp for queries where perf_context is enabled as follows:

```
SetPerfLevel(kEnableCount);
Get(1, "foo");
double read_amp = static_cast<double>(get_perf_context()->block_read_byte / get_perf_context()->get_read_bytes);
SetPerfLevel(kDisable);
```

Our internal infra enables perf_context for a sampling of queries. So we'll be able to compute the read-amp for the sample set, which can give us a good estimate of read-amp.
Closes https://github.com/facebook/rocksdb/pull/2749

Differential Revision: D5647240

Pulled By: ajkr

fbshipit-source-id: ad73550b06990cf040cc4528fa885360f308ec12
2017-08-18 11:43:33 -07:00
..
builder.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
builder.h Change RocksDB License 2017-07-15 16:11:23 -07:00
c.cc expose set_skip_stats_update_on_db_open to C bindings 2017-08-11 12:16:45 -07:00
c_test.c Fix c_test ASAN failure 2017-08-11 13:00:15 -07:00
column_family.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
column_family.h Change RocksDB License 2017-07-15 16:11:23 -07:00
column_family_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
compact_files_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
compacted_db_impl.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
compacted_db_impl.h Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
compaction.cc Fix false removal of tombstone issue in FIFO and kCompactionStyleNone 2017-08-15 13:02:19 -07:00
compaction.h Change RocksDB License 2017-07-15 16:11:23 -07:00
compaction_iteration_stats.h Change RocksDB License 2017-07-15 16:11:23 -07:00
compaction_iterator.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
compaction_iterator.h Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
compaction_iterator_test.cc Allow merge operator to be called even with a single operand 2017-08-16 23:42:00 -07:00
compaction_job.cc Fix compaction div by zero logging 2017-07-24 11:58:02 -07:00
compaction_job.h Change RocksDB License 2017-07-15 16:11:23 -07:00
compaction_job_stats_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
compaction_job_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
compaction_picker.cc Fix caching of compaction picker's next index 2017-07-21 20:57:15 -07:00
compaction_picker.h Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
compaction_picker_test.cc Fix FIFO compaction picker test 2017-07-26 12:12:26 -07:00
compaction_picker_universal.cc update scores after picking universal compaction 2017-08-16 18:42:33 -07:00
compaction_picker_universal.h Change RocksDB License 2017-07-15 16:11:23 -07:00
comparator_db_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
convenience.cc add VerifyChecksum() to db.h 2017-08-09 15:58:13 -07:00
corruption_test.cc fix corruption_test valgrind 2017-08-11 12:29:14 -07:00
cuckoo_table_db_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_basic_test.cc perf_context measure user bytes read 2017-08-18 11:43:33 -07:00
db_block_cache_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
db_bloom_filter_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
db_compaction_filter_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
db_compaction_test.cc fix deletion dropping in intra-L0 2017-08-11 18:12:38 -07:00
db_dynamic_level_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
db_encryption_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_filesnapshot.cc Remove some left-over BSD headers 2017-07-18 11:56:57 -07:00
db_flush_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
db_impl.cc perf_context measure user bytes read 2017-08-18 11:43:33 -07:00
db_impl.h Update WritePrepared with the pseudo code 2017-08-16 16:57:47 -07:00
db_impl_compaction_flush.cc Introduce bottom-pri thread pool for large universal compactions 2017-08-03 15:43:29 -07:00
db_impl_debug.cc Introduce bottom-pri thread pool for large universal compactions 2017-08-03 15:43:29 -07:00
db_impl_experimental.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_impl_files.cc move TableCache::EraseHandle outside of db mutex 2017-07-27 12:14:41 -07:00
db_impl_open.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_impl_readonly.cc Add Iterator::Refresh() 2017-07-24 10:54:37 -07:00
db_impl_readonly.h Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
db_impl_write.cc fix some misspellings 2017-08-16 21:57:20 -07:00
db_info_dumper.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_info_dumper.h Change RocksDB License 2017-07-15 16:11:23 -07:00
db_inplace_update_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_io_failure_test.cc Fix LITE unit tests 2017-07-26 21:11:47 -07:00
db_iter.cc perf_context measure user bytes read 2017-08-18 11:43:33 -07:00
db_iter.h Add Iterator::Refresh() 2017-07-24 10:54:37 -07:00
db_iter_test.cc Add Iterator::Refresh() 2017-07-24 10:54:37 -07:00
db_iterator_test.cc perf_context measure user bytes read 2017-08-18 11:43:33 -07:00
db_log_iter_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_memtable_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
db_merge_operator_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_options_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_properties_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
db_range_del_test.cc fix deleterange with memtable prefix bloom 2017-08-16 19:13:01 -07:00
db_sst_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
db_statistics_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_table_properties_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_tailing_iter_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
db_test.cc Fix false removal of tombstone issue in FIFO and kCompactionStyleNone 2017-08-15 13:02:19 -07:00
db_test2.cc Support prefetch last 512KB with direct I/O in block based file reader 2017-08-11 12:16:45 -07:00
db_test_util.cc Fix LITE unit tests 2017-07-26 21:11:47 -07:00
db_test_util.h Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
db_universal_compaction_test.cc update scores after picking universal compaction 2017-08-16 18:42:33 -07:00
db_wal_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_write_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
dbformat.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
dbformat.h Replace dynamic_cast<> 2017-07-28 16:27:16 -07:00
dbformat_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
deletefile_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
event_helpers.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
event_helpers.h Change RocksDB License 2017-07-15 16:11:23 -07:00
experimental.cc Replace dynamic_cast<> 2017-07-28 16:27:16 -07:00
external_sst_file_basic_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
external_sst_file_ingestion_job.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
external_sst_file_ingestion_job.h Change RocksDB License 2017-07-15 16:11:23 -07:00
external_sst_file_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
fault_injection_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
file_indexer.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
file_indexer.h Change RocksDB License 2017-07-15 16:11:23 -07:00
file_indexer_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
filename_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
flush_job.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
flush_job.h Change RocksDB License 2017-07-15 16:11:23 -07:00
flush_job_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
flush_scheduler.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
flush_scheduler.h Change RocksDB License 2017-07-15 16:11:23 -07:00
forward_iterator.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
forward_iterator.h Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
forward_iterator_bench.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
internal_stats.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
internal_stats.h Change RocksDB License 2017-07-15 16:11:23 -07:00
job_context.h Change RocksDB License 2017-07-15 16:11:23 -07:00
listener_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
log_format.h Change RocksDB License 2017-07-15 16:11:23 -07:00
log_reader.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
log_reader.h Change RocksDB License 2017-07-15 16:11:23 -07:00
log_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
log_writer.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
log_writer.h Change RocksDB License 2017-07-15 16:11:23 -07:00
malloc_stats.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
malloc_stats.h Change RocksDB License 2017-07-15 16:11:23 -07:00
managed_iterator.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
managed_iterator.h Change RocksDB License 2017-07-15 16:11:23 -07:00
manual_compaction_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
memtable.cc fix deleterange with memtable prefix bloom 2017-08-16 19:13:01 -07:00
memtable.h Change RocksDB License 2017-07-15 16:11:23 -07:00
memtable_list.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
memtable_list.h Change RocksDB License 2017-07-15 16:11:23 -07:00
memtable_list_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
merge_context.h Change RocksDB License 2017-07-15 16:11:23 -07:00
merge_helper.cc Allow merge operator to be called even with a single operand 2017-08-16 23:42:00 -07:00
merge_helper.h Allow merge operator to be called even with a single operand 2017-08-16 23:42:00 -07:00
merge_helper_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
merge_operator.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
merge_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
options_file_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
perf_context_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
pinned_iterators_manager.h Change RocksDB License 2017-07-15 16:11:23 -07:00
plain_table_db_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
prefix_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
range_del_aggregator.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
range_del_aggregator.h Change RocksDB License 2017-07-15 16:11:23 -07:00
range_del_aggregator_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
repair.cc Try to repair db with wal_dir option, avoid leak some WAL files 2017-08-08 10:47:57 -07:00
repair_test.cc Try to repair db with wal_dir option, avoid leak some WAL files 2017-08-08 10:47:57 -07:00
snapshot_impl.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
snapshot_impl.h Update WritePrepared with the pseudo code 2017-08-16 16:57:47 -07:00
table_cache.cc fix db get/write stats 2017-07-31 12:12:03 -07:00
table_cache.h Change RocksDB License 2017-07-15 16:11:23 -07:00
table_properties_collector.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
table_properties_collector.h Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
table_properties_collector_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
transaction_log_impl.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
transaction_log_impl.h Change RocksDB License 2017-07-15 16:11:23 -07:00
version_builder.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
version_builder.h Change RocksDB License 2017-07-15 16:11:23 -07:00
version_builder_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
version_edit.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
version_edit.h Change RocksDB License 2017-07-15 16:11:23 -07:00
version_edit_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
version_set.cc Introduce bottom-pri thread pool for large universal compactions 2017-08-03 15:43:29 -07:00
version_set.h Introduce bottom-pri thread pool for large universal compactions 2017-08-03 15:43:29 -07:00
version_set_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
wal_manager.cc Replace dynamic_cast<> 2017-07-28 16:27:16 -07:00
wal_manager.h Change RocksDB License 2017-07-15 16:11:23 -07:00
wal_manager_test.cc Revert "comment out unused parameters" 2017-07-21 18:26:26 -07:00
write_batch.cc Update WritePrepared with the pseudo code 2017-08-16 16:57:47 -07:00
write_batch_base.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
write_batch_internal.h Change RocksDB License 2017-07-15 16:11:23 -07:00
write_batch_test.cc Gcc 7 ParsedInternalKey replace memset with clear function. 2017-07-24 11:31:15 -07:00
write_callback.h Change RocksDB License 2017-07-15 16:11:23 -07:00
write_callback_test.cc Fix flaky write_callback_test 2017-07-25 16:42:11 -07:00
write_controller.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
write_controller.h Change RocksDB License 2017-07-15 16:11:23 -07:00
write_controller_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
write_thread.cc Fix the overflow bug in AwaitState 2017-08-03 10:43:28 -07:00
write_thread.h fix comment 2017-08-09 22:57:01 -07:00