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# RocksDB Get Performance Benchmarks
Results associated with [Improve Java API `get()` performance by reducing copies](https://github.com/facebook/rocksdb/pull/10970)
## 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:
```java
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()](https://github.com/facebook/rocksdb/pull/11019)
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.
|
