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162 lines
14 KiB
162 lines
14 KiB
1 year ago
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# RocksDB Get Performance Benchmarks
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Results associated with [Improve Java API `get()` performance by reducing copies](https://github.com/facebook/rocksdb/pull/10970)
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## Build/Run
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Mac
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```
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make clean jclean
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DEBUG_LEVEL=0 make -j12 rocksdbjava
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(cd java/target; cp rocksdbjni-7.9.0-osx.jar rocksdbjni-7.9.0-SNAPSHOT-osx.jar)
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mvn install:install-file -Dfile=./java/target/rocksdbjni-7.9.0-SNAPSHOT-osx.jar -DgroupId=org.rocksdb -DartifactId=rocksdbjni -Dversion=7.9.0-SNAPSHOT -Dpackaging=jar
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```
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Linux
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```
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make clean jclean
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DEBUG_LEVEL=0 make -j12 rocksdbjava
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(cd java/target; cp rocksdbjni-7.9.0-linux64.jar rocksdbjni-7.9.0-SNAPSHOT-linux64.jar)
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mvn install:install-file -Dfile=./java/target/rocksdbjni-7.9.0-SNAPSHOT-linux64.jar -DgroupId=org.rocksdb -DartifactId=rocksdbjni -Dversion=7.9.0-SNAPSHOT -Dpackaging=jar
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```
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Build jmh test package, on either platform
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```
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pushd java/jmh
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mvn clean package
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```
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A quick test run, just as a sanity check, using a small number of keys, would be
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```
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java -jar target/rocksdbjni-jmh-1.0-SNAPSHOT-benchmarks.jar -p keyCount=1000 -p keySize=128 -p valueSize=32768 -p columnFamilyTestType="no_column_family" GetBenchmarks
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```
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The long performance run (as big as we can make it on our Ubuntu box without filling the disk)
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```
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java -jar target/rocksdbjni-jmh-1.0-SNAPSHOT-benchmarks.jar -p keyCount=1000,50000 -p keySize=128 -p valueSize=1024,16384 -p columnFamilyTestType="1_column_family","20_column_families" GetBenchmarks.get GetBenchmarks.preallocatedByteBufferGet GetBenchmarks.preallocatedGet
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```
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## Results (small runs, Mac)
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These are run on a 10-core M1 with 64GB of memory and 2TB of SSD.
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They probably reflect the absolute best case for this optimization, hitting in-memory buffers and completely eliminating a buffer copy.
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### Before
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Benchmark (columnFamilyTestType) (keyCount) (keySize) (multiGetSize) (valueSize) Mode Cnt Score Error Units
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GetBenchmarks.get no_column_family 1000 128 N/A 32768 thrpt 25 43496.578 ± 5743.090 ops/s
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GetBenchmarks.preallocatedByteBufferGet no_column_family 1000 128 N/A 32768 thrpt 25 70765.578 ± 697.548 ops/s
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GetBenchmarks.preallocatedGet no_column_family 1000 128 N/A 32768 thrpt 25 69883.554 ± 944.184 ops/s
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### After fixing byte[] (.get and .preallocatedGet)
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Benchmark (columnFamilyTestType) (keyCount) (keySize) (multiGetSize) (valueSize) Mode Cnt Score Error Units
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GetBenchmarks.get no_column_family 1000 128 N/A 32768 thrpt 25 149207.681 ± 2261.671 ops/s
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GetBenchmarks.preallocatedByteBufferGet no_column_family 1000 128 N/A 32768 thrpt 25 68920.489 ± 1574.664 ops/s
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GetBenchmarks.preallocatedGet no_column_family 1000 128 N/A 32768 thrpt 25 177399.022 ± 2107.375 ops/s
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### After fixing ByteBuffer (.preallocatedByteBufferGet)
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Benchmark (columnFamilyTestType) (keyCount) (keySize) (multiGetSize) (valueSize) Mode Cnt Score Error Units
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GetBenchmarks.get no_column_family 1000 128 N/A 32768 thrpt 25 150389.259 ± 1371.473 ops/s
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GetBenchmarks.preallocatedByteBufferGet no_column_family 1000 128 N/A 32768 thrpt 25 179919.468 ± 1670.714 ops/s
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GetBenchmarks.preallocatedGet no_column_family 1000 128 N/A 32768 thrpt 25 178261.938 ± 2630.571 ops/s
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## Results (Ubuntu, big runs)
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These take 3-4 hours
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```
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java -jar target/rocksdbjni-jmh-1.0-SNAPSHOT-benchmarks.jar -p keyCount=1000,50000 -p keySize=128 -p valueSize=1024,16384 -p columnFamilyTestType="1_column_family","20_column_families" GetBenchmarks.get GetBenchmarks.preallocatedByteBufferGet GetBenchmarks.preallocatedGet
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```
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It's clear that all `get()` variants have noticeably improved performance, though not the spectacular gains of the M1.
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### With fixes for all of the `get()` instances
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Benchmark (columnFamilyTestType) (keyCount) (keySize) (valueSize) Mode Cnt Score Error Units
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GetBenchmarks.get 1_column_family 1000 128 1024 thrpt 25 935648.793 ± 22879.910 ops/s
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GetBenchmarks.get 1_column_family 1000 128 16384 thrpt 25 204366.301 ± 1326.570 ops/s
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GetBenchmarks.get 1_column_family 50000 128 1024 thrpt 25 693451.990 ± 19822.720 ops/s
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GetBenchmarks.get 1_column_family 50000 128 16384 thrpt 25 50473.768 ± 497.335 ops/s
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GetBenchmarks.get 20_column_families 1000 128 1024 thrpt 25 550118.874 ± 14289.009 ops/s
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GetBenchmarks.get 20_column_families 1000 128 16384 thrpt 25 120545.549 ± 648.280 ops/s
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GetBenchmarks.get 20_column_families 50000 128 1024 thrpt 25 235671.353 ± 2231.195 ops/s
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GetBenchmarks.get 20_column_families 50000 128 16384 thrpt 25 12463.887 ± 1950.746 ops/s
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GetBenchmarks.preallocatedByteBufferGet 1_column_family 1000 128 1024 thrpt 25 1196026.040 ± 35435.729 ops/s
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GetBenchmarks.preallocatedByteBufferGet 1_column_family 1000 128 16384 thrpt 25 403252.655 ± 3287.054 ops/s
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GetBenchmarks.preallocatedByteBufferGet 1_column_family 50000 128 1024 thrpt 25 829965.448 ± 16945.452 ops/s
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GetBenchmarks.preallocatedByteBufferGet 1_column_family 50000 128 16384 thrpt 25 63798.042 ± 1292.858 ops/s
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GetBenchmarks.preallocatedByteBufferGet 20_column_families 1000 128 1024 thrpt 25 724557.253 ± 12710.828 ops/s
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GetBenchmarks.preallocatedByteBufferGet 20_column_families 1000 128 16384 thrpt 25 176846.615 ± 1121.644 ops/s
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GetBenchmarks.preallocatedByteBufferGet 20_column_families 50000 128 1024 thrpt 25 263553.764 ± 1304.243 ops/s
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GetBenchmarks.preallocatedByteBufferGet 20_column_families 50000 128 16384 thrpt 25 14721.693 ± 2574.240 ops/s
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GetBenchmarks.preallocatedGet 1_column_family 1000 128 1024 thrpt 25 1093947.765 ± 42846.276 ops/s
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GetBenchmarks.preallocatedGet 1_column_family 1000 128 16384 thrpt 25 391629.913 ± 4039.965 ops/s
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GetBenchmarks.preallocatedGet 1_column_family 50000 128 1024 thrpt 25 769332.958 ± 24180.749 ops/s
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GetBenchmarks.preallocatedGet 1_column_family 50000 128 16384 thrpt 25 61712.038 ± 423.494 ops/s
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GetBenchmarks.preallocatedGet 20_column_families 1000 128 1024 thrpt 25 694684.465 ± 5484.205 ops/s
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GetBenchmarks.preallocatedGet 20_column_families 1000 128 16384 thrpt 25 172383.593 ± 841.679 ops/s
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GetBenchmarks.preallocatedGet 20_column_families 50000 128 1024 thrpt 25 257447.351 ± 1388.667 ops/s
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GetBenchmarks.preallocatedGet 20_column_families 50000 128 16384 thrpt 25 13418.522 ± 2418.619 ops/s
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### Baseline (no fixes)
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Benchmark (columnFamilyTestType) (keyCount) (keySize) (valueSize) Mode Cnt Score Error Units
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GetBenchmarks.get 1_column_family 1000 128 1024 thrpt 25 866745.224 ± 8834.629 ops/s
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GetBenchmarks.get 1_column_family 1000 128 16384 thrpt 25 184332.195 ± 2304.217 ops/s
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GetBenchmarks.get 1_column_family 50000 128 1024 thrpt 25 666794.288 ± 16150.684 ops/s
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GetBenchmarks.get 1_column_family 50000 128 16384 thrpt 25 47221.788 ± 433.165 ops/s
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GetBenchmarks.get 20_column_families 1000 128 1024 thrpt 25 551513.636 ± 7763.681 ops/s
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GetBenchmarks.get 20_column_families 1000 128 16384 thrpt 25 113117.720 ± 580.738 ops/s
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GetBenchmarks.get 20_column_families 50000 128 1024 thrpt 25 238675.555 ± 1758.978 ops/s
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GetBenchmarks.get 20_column_families 50000 128 16384 thrpt 25 11639.390 ± 1459.765 ops/s
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GetBenchmarks.preallocatedByteBufferGet 1_column_family 1000 128 1024 thrpt 25 1153617.917 ± 26350.028 ops/s
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GetBenchmarks.preallocatedByteBufferGet 1_column_family 1000 128 16384 thrpt 25 401710.334 ± 4324.539 ops/s
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GetBenchmarks.preallocatedByteBufferGet 1_column_family 50000 128 1024 thrpt 25 809384.073 ± 13833.871 ops/s
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GetBenchmarks.preallocatedByteBufferGet 1_column_family 50000 128 16384 thrpt 25 59279.005 ± 443.207 ops/s
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GetBenchmarks.preallocatedByteBufferGet 20_column_families 1000 128 1024 thrpt 25 715466.403 ± 6591.375 ops/s
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GetBenchmarks.preallocatedByteBufferGet 20_column_families 1000 128 16384 thrpt 25 175279.163 ± 910.923 ops/s
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GetBenchmarks.preallocatedByteBufferGet 20_column_families 50000 128 1024 thrpt 25 263295.180 ± 856.456 ops/s
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GetBenchmarks.preallocatedByteBufferGet 20_column_families 50000 128 16384 thrpt 25 14001.928 ± 2462.067 ops/s
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GetBenchmarks.preallocatedGet 1_column_family 1000 128 1024 thrpt 25 1072866.854 ± 27030.592 ops/s
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GetBenchmarks.preallocatedGet 1_column_family 1000 128 16384 thrpt 25 383950.853 ± 4510.654 ops/s
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GetBenchmarks.preallocatedGet 1_column_family 50000 128 1024 thrpt 25 764395.469 ± 10097.417 ops/s
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GetBenchmarks.preallocatedGet 1_column_family 50000 128 16384 thrpt 25 56851.330 ± 388.029 ops/s
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GetBenchmarks.preallocatedGet 20_column_families 1000 128 1024 thrpt 25 668518.593 ± 9764.117 ops/s
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GetBenchmarks.preallocatedGet 20_column_families 1000 128 16384 thrpt 25 171309.695 ± 875.895 ops/s
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GetBenchmarks.preallocatedGet 20_column_families 50000 128 1024 thrpt 25 256057.801 ± 954.621 ops/s
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GetBenchmarks.preallocatedGet 20_column_families 50000 128 16384 thrpt 25 13319.380 ± 2126.654 ops/s
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### Comparison
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It does at least look best when the data is cached. That is to say, smallest number of column families, and least keys.
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GetBenchmarks.get 1_column_family 1000 128 16384 thrpt 25 204366.301 ± 1326.570 ops/s
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GetBenchmarks.get 1_column_family 1000 128 16384 thrpt 25 184332.195 ± 2304.217 ops/s
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GetBenchmarks.get 1_column_family 50000 128 16384 thrpt 25 50473.768 ± 497.335 ops/s
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GetBenchmarks.get 1_column_family 50000 128 16384 thrpt 25 47221.788 ± 433.165 ops/s
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GetBenchmarks.get 20_column_families 1000 128 16384 thrpt 25 120545.549 ± 648.280 ops/s
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GetBenchmarks.get 20_column_families 1000 128 16384 thrpt 25 113117.720 ± 580.738 ops/s
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GetBenchmarks.get 20_column_families 50000 128 16384 thrpt 25 12463.887 ± 1950.746 ops/s
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GetBenchmarks.get 20_column_families 50000 128 16384 thrpt 25 11639.390 ± 1459.765 ops/s
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### Baseline
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25 minute run, small number of keys
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```
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java -jar target/rocksdbjni-jmh-1.0-SNAPSHOT-benchmarks.jar -p keyCount=1000 -p keySize=128 -p valueSize=32768 -p columnFamilyTestType="no_column_families" GetBenchmarks.get GetBenchmarks.preallocatedByteBufferGet GetBenchmarks.preallocatedGet
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```
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Benchmark (columnFamilyTestType) (keyCount) (keySize) (valueSize) Mode Cnt Score Error Units
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GetBenchmarks.get no_column_families 1000 128 32768 thrpt 25 32344.908 ± 296.651 ops/s
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GetBenchmarks.preallocatedByteBufferGet no_column_families 1000 128 32768 thrpt 25 45266.968 ± 424.514 ops/s
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GetBenchmarks.preallocatedGet no_column_families 1000 128 32768 thrpt 25 43531.088 ± 291.785 ops/s
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### Optimized
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Benchmark (columnFamilyTestType) (keyCount) (keySize) (valueSize) Mode Cnt Score Error Units
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GetBenchmarks.get no_column_families 1000 128 32768 thrpt 25 37463.716 ± 235.744 ops/s
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GetBenchmarks.preallocatedByteBufferGet no_column_families 1000 128 32768 thrpt 25 48946.105 ± 466.463 ops/s
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GetBenchmarks.preallocatedGet no_column_families 1000 128 32768 thrpt 25 47143.624 ± 576.763 ops/s
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## Conclusion
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The performance improvement is real.
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