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  1. Core Server
  2. SERVER-1628

Excessive CPU usage by available replicaset nodes when one node is down

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    • Icon: Bug Bug
    • Resolution: Done
    • Icon: Major - P3 Major - P3
    • 1.6.1, 1.7.0
    • 1.6.0
    • Performance, Replication
    • None
    • Windows 7 64bit
    • ALL

    Description

      In a replicaset of 3 idle nodes, when one node is unavailable, the remaining two nodes' processes spike to about 60%-80% CPU usage. The spikes seem to occur in an alternating fashion once a second.

      Bringing the missing node back online results in all nodes' processes returning to a consistent <1% cpu usage.

      The attached graph shows the processes spiking on CPU #2 (right most graph) and then returning to normal at the end when the 3rd node is brought back online.

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            dwight@mongodb.com Dwight Merriman
            andrewk AndrewK
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              Created:
              Updated:
              Resolved: