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  1. Core Server
  2. SERVER-26778

Incremental chunk metadata refresh is slow

    Details

    • Type: Bug
    • Status: Open
    • Priority: Major - P3
    • Resolution: Unresolved
    • Affects Version/s: 3.2.10, 3.4.0-rc1
    • Fix Version/s: Backlog
    • Component/s: Sharding
    • Labels:
      None

      Description

      Initial chunk load, which requires a table scan, is 1.1 seconds:

      2016-10-24T16:18:01.297+0000 I SHARDING [Balancer] ChunkManager: time to load chunks for buildlogs.logs: 1133ms sequenceNumber: 2 version: 157970|1||576339e709168e06c8eb8097 base
      

      Subsequent refreshes, which require a very fast query (0 ms) still take over 250ms:

      2016-10-24T16:33:41.683+0000 I SHARDING [Balancer] ChunkManager: time to load chunks for buildlogs.logs: 264ms sequenceNumber: 3 version: 157970|4||576339e709168e06c8eb8097 based
      

      This issue is to investigate the issue.

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              • Created:
                Updated: