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Peter Dillinger 3c17930ede Change default block cache from 8MB to 32MB (#11350) 
Summary:
... which increases default number of shards from 16 to 64. Although the default block cache size is only recommended for applications where RocksDB is not performance-critical, under stress conditions, block cache mutex contention could become a performance bottleneck. This change of default should alleviate that.

Note that reducing the size of cache shards (recommended minimum 512MB) could cause thrashing, e.g. on filter blocks, so capacity needs to increase to safely increase number of shards.

The 8MB default dates back to 2011 or earlier (f779e7a5), when the most simultaneous threads you could get from a single CPU socket was 20 (e.g. Intel Xeon E7-8870). Now more than 100 is available.

Pull Request resolved: https://github.com/facebook/rocksdb/pull/11350

Test Plan: unit tests updated

Reviewed By: cbi42

Differential Revision: D44674873

Pulled By: pdillinger

fbshipit-source-id: 91ed3070789b42679283c7e6dc97c41a6a97bdf4
2023-04-04 15:33:24 -07:00
..
advisor Fix lint issues after enable BLACK (#10717) 2022-09-21 13:37:51 -07:00
block_cache_analyzer Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
dump Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
analyze_txn_stress_test.sh
auto_sanity_test.sh
backup_db.sh Revamp check_format_compatible.sh (#8012) 2021-03-02 11:42:27 -08:00
benchmark.sh Fix file modes (#10815) 2022-10-13 09:00:37 -07:00
benchmark_ci.py Remove NUMA setting for benchmark-linux (#11180) 2023-02-02 15:15:09 -08:00
benchmark_compare.sh Fix file modes (#10815) 2022-10-13 09:00:37 -07:00
benchmark_leveldb.sh
blob_dump.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
check_all_python.py Enable BLACK for internal_repo_rocksdb (#10710) 2022-09-20 17:47:52 -07:00
check_format_compatible.sh Updates for the 8.1 release (HISTORY, version.h, compatibility tests) (#11307) 2023-03-18 13:15:15 -07:00
CMakeLists.txt
db_bench.cc Add (& fix) some simple source code checks (#8821) 2021-09-07 21:19:27 -07:00
db_bench_tool.cc Change default block cache from 8MB to 32MB (#11350) 2023-04-04 15:33:24 -07:00
db_bench_tool_test.cc Remove deprecated util functions in options_util.h (#11126) 2023-01-27 11:10:53 -08:00
db_crashtest.py Extend the stress test coverage of MultiGetEntity (#11336) 2023-03-29 20:35:15 -07:00
db_repl_stress.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
db_sanity_test.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
dbench_monitor
Dockerfile
generate_random_db.sh
ingest_external_sst.sh
io_tracer_parser.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
io_tracer_parser_test.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
io_tracer_parser_tool.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
io_tracer_parser_tool.h Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
ldb.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
ldb_cmd.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
ldb_cmd_impl.h Run clang format against files under tools/ and db_stress_tool/ (#10868) 2022-10-25 14:29:41 -07:00
ldb_cmd_test.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
ldb_test.py Enable BLACK for internal_repo_rocksdb (#10710) 2022-09-20 17:47:52 -07:00
ldb_tool.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
pflag
reduce_levels_test.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
regression_test.sh Fix hang in async_io benchmarks in regression script (#11285) 2023-03-09 09:16:20 -08:00
restore_db.sh Revamp check_format_compatible.sh (#8012) 2021-03-02 11:42:27 -08:00
rocksdb_dump_test.sh
run_blob_bench.sh Support prepopulating/warming the blob cache (#10298) 2022-07-17 07:13:59 -07:00
run_flash_bench.sh
run_leveldb.sh
sample-dump.dmp
simulated_hybrid_file_system.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
simulated_hybrid_file_system.h Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
sst_dump.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
sst_dump_test.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
sst_dump_tool.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
trace_analyzer.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
trace_analyzer_test.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
trace_analyzer_tool.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
trace_analyzer_tool.h Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
verify_random_db.sh Fix some bugs in verify_random_db.sh (#10112) 2022-06-03 16:35:13 -07:00
write_external_sst.sh Revamp check_format_compatible.sh (#8012) 2021-03-02 11:42:27 -08:00
write_stress.cc Remove RocksDB LITE (#11147) 2023-01-27 13:14:19 -08:00
write_stress_runner.py Enable BLACK for internal_repo_rocksdb (#10710) 2022-09-20 17:47:52 -07:00