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Posted to notifications@iotdb.apache.org by "刘珍 (Jira)" <ji...@apache.org> on 2022/03/01 06:47:00 UTC

[jira] [Created] (IOTDB-2636) [compaction] Compaction affects query performance

刘珍 created IOTDB-2636:
-------------------------

             Summary: [compaction] Compaction affects query performance
                 Key: IOTDB-2636
                 URL: https://issues.apache.org/jira/browse/IOTDB-2636
             Project: Apache IoTDB
          Issue Type: Bug
          Components: Core/Compaction
            Reporter: 刘珍
         Attachments: image-2022-03-01-14-30-59-082.png, image-2022-03-01-14-37-30-548.png, image-2022-03-01-14-44-37-559.png

master-pre3
测试环境：
私有云8C32G，16Gheap，无乱序，长测配置。
1. master 关合并/开合并对比
cwt代表参数 merge_write_throughput_mb_per_sec
master开合并会导致查询性能下降约20%。
 !image-2022-03-01-14-30-59-082.png! 
2. master-pre3和0.12.5-pre6开合并对比
merge_write_throughput_mb_per_sec均为8
master总体比0.12慢70%
 !image-2022-03-01-14-37-30-548.png! 
这个查询对应的写入性能（作为查询基于的数据量的参照），master查询的数据不大于0.12.5：
 !image-2022-03-01-14-44-37-559.png! 




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