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rocksdb/java/GetPutBenchmarks.md

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RocksDB Get Performance Benchmarks

Results associated with Improve Java API get() performance by reducing copies

Build/Run

Mac

make clean jclean
DEBUG_LEVEL=0 make -j12 rocksdbjava
(cd java/target; cp rocksdbjni-7.10.0-osx.jar rocksdbjni-7.10.0-SNAPSHOT-osx.jar)
mvn install:install-file -Dfile=./java/target/rocksdbjni-7.10.0-SNAPSHOT-osx.jar -DgroupId=org.rocksdb -DartifactId=rocksdbjni -Dversion=7.10.0-SNAPSHOT -Dpackaging=jar

Linux

make clean jclean
DEBUG_LEVEL=0 make -j12 rocksdbjava
(cd java/target; cp rocksdbjni-7.10.0-linux64.jar rocksdbjni-7.10.0-SNAPSHOT-linux64.jar)
mvn install:install-file -Dfile=./java/target/rocksdbjni-7.10.0-SNAPSHOT-linux64.jar -DgroupId=org.rocksdb -DartifactId=rocksdbjni -Dversion=7.10.0-SNAPSHOT -Dpackaging=jar

Build jmh test package, on either platform

pushd java/jmh
mvn clean package

A quick test run, just as a sanity check, using a small number of keys, would be

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

The long performance run (as big as we can make it on our Ubuntu box without filling the disk)

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

Results (Ubuntu, big runs)

NB - we have removed some test results we initially observed on Mac which were not later reproducible.

These take 3-4 hours

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

It's clear that all get() variants have noticeably improved performance, though not the spectacular gains of the M1.

With fixes for all of the get() instances

The tests which use methods which have had performance improvements applied are:

get()
preallocatedGet()
preallocatedByteBufferGet()

Benchmark (columnFamilyTestType) (keyCount) (keySize) (valueSize) Mode Cnt Score Error Units GetBenchmarks.get 1_column_family 1000 128 1024 thrpt 25 935648.793 ± 22879.910 ops/s GetBenchmarks.get 1_column_family 1000 128 16384 thrpt 25 204366.301 ± 1326.570 ops/s GetBenchmarks.get 1_column_family 50000 128 1024 thrpt 25 693451.990 ± 19822.720 ops/s GetBenchmarks.get 1_column_family 50000 128 16384 thrpt 25 50473.768 ± 497.335 ops/s GetBenchmarks.get 20_column_families 1000 128 1024 thrpt 25 550118.874 ± 14289.009 ops/s GetBenchmarks.get 20_column_families 1000 128 16384 thrpt 25 120545.549 ± 648.280 ops/s GetBenchmarks.get 20_column_families 50000 128 1024 thrpt 25 235671.353 ± 2231.195 ops/s GetBenchmarks.get 20_column_families 50000 128 16384 thrpt 25 12463.887 ± 1950.746 ops/s GetBenchmarks.preallocatedByteBufferGet 1_column_family 1000 128 1024 thrpt 25 1196026.040 ± 35435.729 ops/s GetBenchmarks.preallocatedByteBufferGet 1_column_family 1000 128 16384 thrpt 25 403252.655 ± 3287.054 ops/s GetBenchmarks.preallocatedByteBufferGet 1_column_family 50000 128 1024 thrpt 25 829965.448 ± 16945.452 ops/s GetBenchmarks.preallocatedByteBufferGet 1_column_family 50000 128 16384 thrpt 25 63798.042 ± 1292.858 ops/s GetBenchmarks.preallocatedByteBufferGet 20_column_families 1000 128 1024 thrpt 25 724557.253 ± 12710.828 ops/s GetBenchmarks.preallocatedByteBufferGet 20_column_families 1000 128 16384 thrpt 25 176846.615 ± 1121.644 ops/s GetBenchmarks.preallocatedByteBufferGet 20_column_families 50000 128 1024 thrpt 25 263553.764 ± 1304.243 ops/s GetBenchmarks.preallocatedByteBufferGet 20_column_families 50000 128 16384 thrpt 25 14721.693 ± 2574.240 ops/s GetBenchmarks.preallocatedGet 1_column_family 1000 128 1024 thrpt 25 1093947.765 ± 42846.276 ops/s GetBenchmarks.preallocatedGet 1_column_family 1000 128 16384 thrpt 25 391629.913 ± 4039.965 ops/s GetBenchmarks.preallocatedGet 1_column_family 50000 128 1024 thrpt 25 769332.958 ± 24180.749 ops/s GetBenchmarks.preallocatedGet 1_column_family 50000 128 16384 thrpt 25 61712.038 ± 423.494 ops/s GetBenchmarks.preallocatedGet 20_column_families 1000 128 1024 thrpt 25 694684.465 ± 5484.205 ops/s GetBenchmarks.preallocatedGet 20_column_families 1000 128 16384 thrpt 25 172383.593 ± 841.679 ops/s GetBenchmarks.preallocatedGet 20_column_families 50000 128 1024 thrpt 25 257447.351 ± 1388.667 ops/s GetBenchmarks.preallocatedGet 20_column_families 50000 128 16384 thrpt 25 13418.522 ± 2418.619 ops/s

Baseline (no fixes)

Benchmark (columnFamilyTestType) (keyCount) (keySize) (valueSize) Mode Cnt Score Error Units GetBenchmarks.get 1_column_family 1000 128 1024 thrpt 25 866745.224 ± 8834.629 ops/s GetBenchmarks.get 1_column_family 1000 128 16384 thrpt 25 184332.195 ± 2304.217 ops/s GetBenchmarks.get 1_column_family 50000 128 1024 thrpt 25 666794.288 ± 16150.684 ops/s GetBenchmarks.get 1_column_family 50000 128 16384 thrpt 25 47221.788 ± 433.165 ops/s GetBenchmarks.get 20_column_families 1000 128 1024 thrpt 25 551513.636 ± 7763.681 ops/s GetBenchmarks.get 20_column_families 1000 128 16384 thrpt 25 113117.720 ± 580.738 ops/s GetBenchmarks.get 20_column_families 50000 128 1024 thrpt 25 238675.555 ± 1758.978 ops/s GetBenchmarks.get 20_column_families 50000 128 16384 thrpt 25 11639.390 ± 1459.765 ops/s GetBenchmarks.preallocatedByteBufferGet 1_column_family 1000 128 1024 thrpt 25 1153617.917 ± 26350.028 ops/s GetBenchmarks.preallocatedByteBufferGet 1_column_family 1000 128 16384 thrpt 25 401710.334 ± 4324.539 ops/s GetBenchmarks.preallocatedByteBufferGet 1_column_family 50000 128 1024 thrpt 25 809384.073 ± 13833.871 ops/s GetBenchmarks.preallocatedByteBufferGet 1_column_family 50000 128 16384 thrpt 25 59279.005 ± 443.207 ops/s GetBenchmarks.preallocatedByteBufferGet 20_column_families 1000 128 1024 thrpt 25 715466.403 ± 6591.375 ops/s GetBenchmarks.preallocatedByteBufferGet 20_column_families 1000 128 16384 thrpt 25 175279.163 ± 910.923 ops/s GetBenchmarks.preallocatedByteBufferGet 20_column_families 50000 128 1024 thrpt 25 263295.180 ± 856.456 ops/s GetBenchmarks.preallocatedByteBufferGet 20_column_families 50000 128 16384 thrpt 25 14001.928 ± 2462.067 ops/s GetBenchmarks.preallocatedGet 1_column_family 1000 128 1024 thrpt 25 1072866.854 ± 27030.592 ops/s GetBenchmarks.preallocatedGet 1_column_family 1000 128 16384 thrpt 25 383950.853 ± 4510.654 ops/s GetBenchmarks.preallocatedGet 1_column_family 50000 128 1024 thrpt 25 764395.469 ± 10097.417 ops/s GetBenchmarks.preallocatedGet 1_column_family 50000 128 16384 thrpt 25 56851.330 ± 388.029 ops/s GetBenchmarks.preallocatedGet 20_column_families 1000 128 1024 thrpt 25 668518.593 ± 9764.117 ops/s GetBenchmarks.preallocatedGet 20_column_families 1000 128 16384 thrpt 25 171309.695 ± 875.895 ops/s GetBenchmarks.preallocatedGet 20_column_families 50000 128 1024 thrpt 25 256057.801 ± 954.621 ops/s GetBenchmarks.preallocatedGet 20_column_families 50000 128 16384 thrpt 25 13319.380 ± 2126.654 ops/s

Comparison

It does at least look best when the data is cached. That is to say, smallest number of column families, and least keys.

GetBenchmarks.get 1_column_family 1000 128 16384 thrpt 25 204366.301 ± 1326.570 ops/s GetBenchmarks.get 1_column_family 1000 128 16384 thrpt 25 184332.195 ± 2304.217 ops/s

GetBenchmarks.get 1_column_family 50000 128 16384 thrpt 25 50473.768 ± 497.335 ops/s GetBenchmarks.get 1_column_family 50000 128 16384 thrpt 25 47221.788 ± 433.165 ops/s

GetBenchmarks.get 20_column_families 1000 128 16384 thrpt 25 120545.549 ± 648.280 ops/s GetBenchmarks.get 20_column_families 1000 128 16384 thrpt 25 113117.720 ± 580.738 ops/s

GetBenchmarks.get 20_column_families 50000 128 16384 thrpt 25 12463.887 ± 1950.746 ops/s GetBenchmarks.get 20_column_families 50000 128 16384 thrpt 25 11639.390 ± 1459.765 ops/s

Baseline

25 minute run, small number of keys

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

Benchmark (columnFamilyTestType) (keyCount) (keySize) (valueSize) Mode Cnt Score Error Units GetBenchmarks.get no_column_families 1000 128 32768 thrpt 25 32344.908 ± 296.651 ops/s GetBenchmarks.preallocatedByteBufferGet no_column_families 1000 128 32768 thrpt 25 45266.968 ± 424.514 ops/s GetBenchmarks.preallocatedGet no_column_families 1000 128 32768 thrpt 25 43531.088 ± 291.785 ops/s

Optimized

Benchmark (columnFamilyTestType) (keyCount) (keySize) (valueSize) Mode Cnt Score Error Units GetBenchmarks.get no_column_families 1000 128 32768 thrpt 25 37463.716 ± 235.744 ops/s GetBenchmarks.preallocatedByteBufferGet no_column_families 1000 128 32768 thrpt 25 48946.105 ± 466.463 ops/s GetBenchmarks.preallocatedGet no_column_families 1000 128 32768 thrpt 25 47143.624 ± 576.763 ops/s

Conclusion

The performance improvement is real.

Put Performance Benchmarks

Results associated with Java API consistency between RocksDB.put() , .merge() and Transaction.put() , .merge()

This work was not designed specifically as a performance optimization, but we want to confirm that it has not regressed what it has changed, and to provide a baseline for future possible performance work.

Build/Run

Building is as above. Running is a different invocation of the same JMH jar.

java -jar target/rocksdbjni-jmh-1.0-SNAPSHOT-benchmarks.jar -p keyCount=1000,50000 -p keySize=128 -p valueSize=1024,32768 -p columnFamilyTestType="no_column_family" PutBenchmarks

Before Changes

These results were generated in a private branch with the PutBenchmarks from the PR backported onto the current main.

Benchmark (bufferListSize) (columnFamilyTestType) (keyCount) (keySize) (valueSize) Mode Cnt Score Error Units PutBenchmarks.put 16 no_column_family 1000 128 1024 thrpt 25 76670.200 ± 2555.248 ops/s PutBenchmarks.put 16 no_column_family 1000 128 32768 thrpt 25 3913.692 ± 225.690 ops/s PutBenchmarks.put 16 no_column_family 50000 128 1024 thrpt 25 74479.589 ± 988.361 ops/s PutBenchmarks.put 16 no_column_family 50000 128 32768 thrpt 25 4070.800 ± 194.838 ops/s PutBenchmarks.putByteArrays 16 no_column_family 1000 128 1024 thrpt 25 72150.853 ± 1744.216 ops/s PutBenchmarks.putByteArrays 16 no_column_family 1000 128 32768 thrpt 25 3896.646 ± 188.629 ops/s PutBenchmarks.putByteArrays 16 no_column_family 50000 128 1024 thrpt 25 71753.287 ± 1053.904 ops/s PutBenchmarks.putByteArrays 16 no_column_family 50000 128 32768 thrpt 25 3928.503 ± 264.443 ops/s PutBenchmarks.putByteBuffers 16 no_column_family 1000 128 1024 thrpt 25 72595.105 ± 1027.258 ops/s PutBenchmarks.putByteBuffers 16 no_column_family 1000 128 32768 thrpt 25 3890.100 ± 199.131 ops/s PutBenchmarks.putByteBuffers 16 no_column_family 50000 128 1024 thrpt 25 70878.133 ± 1181.601 ops/s PutBenchmarks.putByteBuffers 16 no_column_family 50000 128 32768 thrpt 25 3863.181 ± 215.888 ops/s

After Changes

These results were generated on the PR branch.

Benchmark (bufferListSize) (columnFamilyTestType) (keyCount) (keySize) (valueSize) Mode Cnt Score Error Units PutBenchmarks.put 16 no_column_family 1000 128 1024 thrpt 25 75178.751 ± 2644.775 ops/s PutBenchmarks.put 16 no_column_family 1000 128 32768 thrpt 25 3937.175 ± 257.039 ops/s PutBenchmarks.put 16 no_column_family 50000 128 1024 thrpt 25 74375.519 ± 1776.654 ops/s PutBenchmarks.put 16 no_column_family 50000 128 32768 thrpt 25 4013.413 ± 257.706 ops/s PutBenchmarks.putByteArrays 16 no_column_family 1000 128 1024 thrpt 25 71418.303 ± 1610.977 ops/s PutBenchmarks.putByteArrays 16 no_column_family 1000 128 32768 thrpt 25 4027.581 ± 227.900 ops/s PutBenchmarks.putByteArrays 16 no_column_family 50000 128 1024 thrpt 25 71229.107 ± 2720.083 ops/s PutBenchmarks.putByteArrays 16 no_column_family 50000 128 32768 thrpt 25 4022.635 ± 212.540 ops/s PutBenchmarks.putByteBuffers 16 no_column_family 1000 128 1024 thrpt 25 71718.501 ± 787.537 ops/s PutBenchmarks.putByteBuffers 16 no_column_family 1000 128 32768 thrpt 25 4078.050 ± 176.331 ops/s PutBenchmarks.putByteBuffers 16 no_column_family 50000 128 1024 thrpt 25 72736.754 ± 828.971 ops/s PutBenchmarks.putByteBuffers 16 no_column_family 50000 128 32768 thrpt 25 3987.232 ± 205.577 ops/s

Discussion

The changes don't appear to have had a material effect on performance. We are happy with this.

  • We would obviously advise running future changes before and after to confirm they have no adverse effects.