mirror of https://github.com/facebook/rocksdb.git
c7ce03dce1
Summary: Previously we enabled tracking expected state changes during `FinishInitDb()`, as soon as the DB was opened. This meant tracing was enabled during `VerifyDb()`. This cost extra CPU by requiring `DBImpl::trace_mutex_` to be acquired on each read operation. It was unnecessary since we know there are no expected state changes during the `VerifyDb()` phase. So, this PR delays tracking expected state changes until after the `VerifyDb()` phase has completed. Pull Request resolved: https://github.com/facebook/rocksdb/pull/9470 Test Plan: Measured this PR reduced `VerifyDb()` 76% (387 -> 92 seconds) with `-disable_wal=1` (i.e., expected state tracking enabled). - benchmark command: `./db_stress -max_key=100000000 -ops_per_thread=1 -destroy_db_initially=1 -expected_values_dir=/dev/shm/dbstress_expected/ -db=/dev/shm/dbstress/ --clear_column_family_one_in=0 --disable_wal=1 --reopen=0` - without this PR, `VerifyDb()` takes 387 seconds: ``` 2022/01/30-21:43:04 Initializing worker threads Crash-recovery verification passed :) 2022/01/30-21:49:31 Starting database operations ``` - with this PR, `VerifyDb()` takes 92 seconds ``` 2022/01/30-21:59:06 Initializing worker threads Crash-recovery verification passed :) 2022/01/30-22:00:38 Starting database operations ``` Reviewed By: riversand963 Differential Revision: D33884596 Pulled By: ajkr fbshipit-source-id: 5f259de8087de5b0531f088e11297f37ed2f7685 |
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| .. | ||
| CMakeLists.txt | ||
| batched_ops_stress.cc | ||
| cf_consistency_stress.cc | ||
| db_stress.cc | ||
| db_stress_common.cc | ||
| db_stress_common.h | ||
| db_stress_compaction_filter.h | ||
| db_stress_driver.cc | ||
| db_stress_driver.h | ||
| db_stress_env_wrapper.h | ||
| db_stress_gflags.cc | ||
| db_stress_listener.cc | ||
| db_stress_listener.h | ||
| db_stress_shared_state.cc | ||
| db_stress_shared_state.h | ||
| db_stress_stat.cc | ||
| db_stress_stat.h | ||
| db_stress_table_properties_collector.h | ||
| db_stress_test_base.cc | ||
| db_stress_test_base.h | ||
| db_stress_tool.cc | ||
| expected_state.cc | ||
| expected_state.h | ||
| multi_ops_txns_stress.cc | ||
| multi_ops_txns_stress.h | ||
| no_batched_ops_stress.cc | ||