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  1. Couchbase Server
  2. MB-28409

Average throughput in YCSB workload A dropped in Vulcan by more than 10%

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Details

    • Untriaged
    • Centos 64-bit
    • Yes

    Description

      Changelog:

      	kv_engine changed from 482a5d2aed91dfe6fce651a5c67bc1b820ffce6e to master
      		 
      		[+] 8e0cf6d MB-22010: Change the default eviction policy to statistical_counter
      		 
      		[+] 1e9c772 MB-28241: check for JSON datatype after inflating snappy data
      		 
      		[+] 876049f MB-28318: Ensure all executor/tasks are finished

      Both daily and weekly tests indicate 10% regression after those changes.

      Unfortunately, there was one more regression in build 5.5.0-1970. Weekly results for tests with replication are affected by two issues. The second regression will be reported separately.

      Setup:

      • 1 node (daily) or 3 nodes (weekly)
      • 1 bucket (default settings, compression off)
      • 10M items (daily) or 20M items (weekly)
      • Mixed workload (reads & updates)

      http://showfast.sc.couchbase.com/#/timeline/Linux/kv/ycsb/all

      Please note, data compression is enabled in Java SDK by default. Currently, KV engine needs to decompress all the incoming mutations. That should be fixed by MB-28379.

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          is caused by

          Bug - A problem which impairs or prevents the functions of the product. MB-28940 3% regression in pillowfight throughput between 5.5.0-1701 and 1714

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MB-28941 Session tracing has too high an impact on pillowfight 80/20 throughput

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          is triggered by

          Bug - A problem which impairs or prevents the functions of the product. MB-28241 Datatype bits are not stored correctly in passive compression mode

          • Major - Major loss of function.
          • Closed
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              pavelpaulau Pavel Paulau (Inactive)
              pavelpaulau Pavel Paulau (Inactive)
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              Dates

                Created:
                Updated:
                Resolved:

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