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  1. Couchbase Server
  2. MB-51382

Magma YCSB workload C performance degrades over time

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Details

    • Task
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • Morpheus
    • storage-engine
    • 1
    • Magma May 2022

    Description

      After a memcached restart Magma's performance is 15-20% higher in a read only YCSB C workload at 1% dgm. This degrades over time and stabilises in about an hour. This is mostly caused by je_malloc fragmentation building up.

      We have to investigate and confirm the cause. Also see if it can be mitigated for low dgm zipfian usecases where we have a 50% cache hit ratio and small changes in memory usage can cause large deviations in throughput.

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            apaar.gupta Apaar Gupta
            apaar.gupta Apaar Gupta
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            Dates

              Created:
              Updated:

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                PagerDuty