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  1. ZABBIX BUGS AND ISSUES
  2. ZBX-18913

Mutex locks under high load are blocking history syncer/trappers

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Details

    • Problem report
    • Status: Confirmed
    • Critical
    • Resolution: Unresolved
    • 4.0.27, 5.0.7
    • None
    • None
    • None

    Description

      Steps to reproduce:

      1. install and use monitoring system
      2. try to scale up using proxies
      3. use built-in functionality like aggregated items
      4. history syncers become at 100% load

      Result:
      Up to 1/3 of the Mutex locks will fail of the valuecache and configuration cache. For example for 5 minutes:

      Strace output will be full of the:

      11414 17:14:50.190574 futex(0x7fcde87bf140, FUTEX_WAIT, 2, NULL) = -1 EAGAIN (Resource temporarily unavailable) <0.000007>
      

      Mostly high count of trapper/history syncer processes are useless on high loaded instance due to the locking problems. Dedicated hardware is not loaded at all - so vertical scale is not happening.

      Expected:
      The amount of processes allowed to be launched should correlate with the ability to handle workload on high performance hardware.

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            zabbix.dev Zabbix Development Team
            edgar.akhmetshin Edgar Akhmetshin
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            Dates

              Created:
              Updated: