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Branimir Lambov commented on CASSANDRA-17240: --------------------------------------------- The test also includes latency stages. Because of the incomplete compaction this patch's latency results (which can be found in [^density_test_with_sharding.html.gz]) can be misleading, thus I'm only showing details and two graphs from the DataStax branch (full data in [^density_SG.html.gz]): {code:java} SG-density-1TB-100byte 9fe6f629 2021-12-15 16:44:11 Note: Trie/big/UCS-30threads-F16...latency_1_1:latency_1_1.result-success --------------------------------------- Total Operations : 499999994 Op Rate : 107119 op/sec Min Latency : 0.143 ms Avg Latency : 1.930 ms Median Latency : 0.996 ms 95th Latency : 4.281 ms 99th Latency : 10.438 ms 99.9th Latency : 227.140 ms Max Latency : 524.632 ms SG-density-1TB-100byte b90ea1ad 2021-12-15 16:15:56 Note: SkipList/big/UCS-30threads-F16...latency_1_1.result-success --------------------------------------- Total Operations : 499999994 Op Rate : 105537 op/sec Min Latency : 0.152 ms Avg Latency : 2.738 ms Median Latency : 1.370 ms 95th Latency : 6.302 ms 99th Latency : 14.265 ms 99.9th Latency : 293.650 ms Max Latency : 567.837 ms {code} !latency-1_1-95.png! {code:java} SG-density-1TB-100byte 9fe6f629 2021-12-15 16:44:11 Note: Trie/big/UCS-30threads-F16...latency_9_1:latency_9_1.result-success --------------------------------------- Total Operations : 499999940 Op Rate : 107616 op/sec Min Latency : 0.138 ms Avg Latency : 1.430 ms Median Latency : 0.715 ms 95th Latency : 2.224 ms 99th Latency : 7.820 ms 99.9th Latency : 270.483 ms Max Latency : 515.391 ms SG-density-1TB-100byte b90ea1ad 2021-12-15 16:15:56 Note: SkipList/big/UCS-30threads-F16...latency_9_1:latency_9_1.result-success --------------------------------------- Total Operations : 499999940 Op Rate : 105789 op/sec Min Latency : 0.148 ms Avg Latency : 2.399 ms Median Latency : 1.007 ms 95th Latency : 5.244 ms 99th Latency : 11.947 ms 99.9th Latency : 328.532 ms Max Latency : 639.730 ms {code} !latency-9_1-95.png! {code:java} SG-density-1TB-100byte 9fe6f629 2021-12-15 16:44:11 Note: Trie/big/UCS-30threads-F16...throughput:throughput.result-success --------------------------------------- Total Operations : 9999999910 Op Rate : 245111 op/sec Min Latency : 0.229 ms Avg Latency : 8.854 ms Median Latency : 7.139 ms 95th Latency : 17.499 ms 99th Latency : 28.672 ms 99.9th Latency : 274.366 ms Max Latency : 1187.840 ms SG-density-1TB-100byte b90ea1ad 2021-12-15 16:15:56 Note: SkipList/big/UCS-30threads-F16...throughput:throughput.result-success --------------------------------------- Total Operations : 9999997880 Op Rate : 107947 op/sec Min Latency : 0.372 ms Avg Latency : 20.273 ms Median Latency : 16.723 ms 95th Latency : 31.178 ms 99th Latency : 105.595 ms 99.9th Latency : 337.592 ms Max Latency : 18652.070 ms {code} Additionally, below are some JMH microbenchmarks of performing database reads off the memtable: {code:java} SkipListMemtable in heap_buffers mode: 10000000 ops written in 89.949s, 5.700GiB (97%) on-heap, 0.000KiB (0%) off-heap TrieMemtable in heap_buffers mode: 10000000 ops written in 35.515s, 4.568GiB (78%) on-heap, 0.000KiB (0%) off-heap Benchmark (BATCH) (count) (flush) (memtableClass) (threadCount) (useNet) Mode Cnt Score Error Units ReadTestSmallPartitions.readFixed 1000 10000000 INMEM SkipListMemtable 1 false avgt 10 3.610 ± 0.046 ms/op ReadTestSmallPartitions.readFixed 1000 10000000 INMEM TrieMemtable 1 false avgt 10 3.625 ± 0.061 ms/op ReadTestSmallPartitions.readOutside 1000 10000000 INMEM SkipListMemtable 1 false avgt 10 2.754 ± 0.027 ms/op ReadTestSmallPartitions.readOutside 1000 10000000 INMEM TrieMemtable 1 false avgt 10 2.306 ± 0.042 ms/op ReadTestSmallPartitions.readRandomInside 1000 10000000 INMEM SkipListMemtable 1 false avgt 10 8.332 ± 0.254 ms/op ReadTestSmallPartitions.readRandomInside 1000 10000000 INMEM TrieMemtable 1 false avgt 10 4.657 ± 0.094 ms/op ReadTestSmallPartitions.readRandomWOutside 1000 10000000 INMEM SkipListMemtable 1 false avgt 10 8.052 ± 0.058 ms/op ReadTestSmallPartitions.readRandomWOutside 1000 10000000 INMEM TrieMemtable 1 false avgt 10 4.690 ± 0.059 ms/op SkipListMemtable in offheap_objects mode: 10000000 ops written in 91.642s, 3.688GiB (63%) on-heap, 534.058MiB (13%) off-heap TrieMemtable in offheap_objects mode: 10000000 ops written in 36.363s, 2.719GiB (46%) on-heap, 862.752MiB (21%) off-heap Benchmark (BATCH) (count) (flush) (memtableClass) (threadCount) (useNet) Mode Cnt Score Error Units ReadTestSmallPartitions.readFixed 1000 10000000 INMEM SkipListMemtable 1 false avgt 10 4.631 ± 0.063 ms/op ReadTestSmallPartitions.readFixed 1000 10000000 INMEM TrieMemtable 1 false avgt 10 4.078 ± 0.044 ms/op ReadTestSmallPartitions.readOutside 1000 10000000 INMEM SkipListMemtable 1 false avgt 10 2.489 ± 0.009 ms/op ReadTestSmallPartitions.readOutside 1000 10000000 INMEM TrieMemtable 1 false avgt 10 2.368 ± 0.025 ms/op ReadTestSmallPartitions.readRandomInside 1000 10000000 INMEM SkipListMemtable 1 false avgt 10 8.921 ± 0.053 ms/op ReadTestSmallPartitions.readRandomInside 1000 10000000 INMEM TrieMemtable 1 false avgt 10 4.991 ± 0.066 ms/op ReadTestSmallPartitions.readRandomWOutside 1000 10000000 INMEM SkipListMemtable 1 false avgt 10 8.333 ± 0.046 ms/op ReadTestSmallPartitions.readRandomWOutside 1000 10000000 INMEM TrieMemtable 1 false avgt 10 4.953 ± 0.070 ms/op {code} > CEP-19: Trie memtable implementation > ------------------------------------ > > Key: CASSANDRA-17240 > URL: https://issues.apache.org/jira/browse/CASSANDRA-17240 > Project: Cassandra > Issue Type: Improvement > Components: Local/Memtable > Reporter: Branimir Lambov > Priority: Normal > Attachments: SkipListMemtable-OSS.png, TrieMemtable-OSS.png, > density_SG.html.gz, density_test_with_sharding.html.gz, latency-1_1-95.png, > latency-9_1-95.png, throughput_SG.png, throughput_apache.png > > > Trie-based memtable implementation as described in CEP-19, built on top of > CASSANDRA-17034 and CASSANDRA-6936. > The implementation is available in this > [branch|https://github.com/blambov/cassandra/tree/CASSANDRA-17240]. -- This message was sent by Atlassian Jira (v8.20.1#820001) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org