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  1. Couchbase Server
  2. MB-18733

XDCR : Replication rate has regressed in build 4.5.0-1798.

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    Description

      Replication rate has regressed in build 4.5.0-1798.

      • 1 x 1, non-DGM (100M)
        4.5.0-1770 : 96K items / sec
        4.5.0-1798 : 42K items / sec.

      All other tests also regressed.

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          Bug - A problem which impairs or prevents the functions of the product. MB-18185 XDCR Average Initial Rate shows a regression from 4.1 to 4.5

          • Major - Major loss of function.
          • Closed
          mentioned in

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          Activity

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            ritesh.motlani Ritesh Motlani (Inactive) added a comment -

            It seems like on 1798 build, goxdcr is crashing couple of times and getting restarted. Restarting goxdcr leads to processing of mutation from the beginning every time goxdcr re-start.

            GOXDCR is crashing at statistic manager service due to race condition. I still working on finding solution.

            -Thanks
            Ritesh

            ritesh.motlani Ritesh Motlani (Inactive) added a comment - It seems like on 1798 build, goxdcr is crashing couple of times and getting restarted. Restarting goxdcr leads to processing of mutation from the beginning every time goxdcr re-start. GOXDCR is crashing at statistic manager service due to race condition. I still working on finding solution. -Thanks Ritesh
            keshav Keshav Murthy added a comment -

            Hi Ritesh, will this be addressed today/tomorrow? Thanks.

            keshav Keshav Murthy added a comment - Hi Ritesh, will this be addressed today/tomorrow? Thanks.
            ritesh.motlani Ritesh Motlani (Inactive) added a comment -

            This issue occurs with go 1.6 . I have not been able to reproduce locally ..
            I am working on reproducing this issue on dev sanity.

            -THanks
            Ritesh

            ritesh.motlani Ritesh Motlani (Inactive) added a comment - This issue occurs with go 1.6 . I have not been able to reproduce locally .. I am working on reproducing this issue on dev sanity. -THanks Ritesh
            ritesh.motlani Ritesh Motlani (Inactive) added a comment - - edited

            I was not able to reproduce these bugs locally with golang 1.6 version.
            but running golang race detector shows problem of "Data Race" Condition on the code as show in the attaced logs.
            so fix would be put locks on settingMap & registryMap and that should fix the problem of goxdcr crashing.
            I hope that should also fix the performance problem but need to test it out.

            -Thanks
            RItesh

            ritesh.motlani Ritesh Motlani (Inactive) added a comment - - edited I was not able to reproduce these bugs locally with golang 1.6 version. but running golang race detector shows problem of "Data Race" Condition on the code as show in the attaced logs. so fix would be put locks on settingMap & registryMap and that should fix the problem of goxdcr crashing. I hope that should also fix the performance problem but need to test it out. -Thanks RItesh
            wayne Wayne Siu added a comment -

            Build 4.5.0-1939 (back to go 1.5) seems to have addressed the regression in replication rate.
            MB-18185 is still open to track the slight regression from go 1.5.

            wayne Wayne Siu added a comment - Build 4.5.0-1939 (back to go 1.5) seems to have addressed the regression in replication rate. MB-18185 is still open to track the slight regression from go 1.5.
            wayne Wayne Siu added a comment -

            Verified in 4.5.0-1939.

            wayne Wayne Siu added a comment - Verified in 4.5.0-1939.

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              wayne Wayne Siu
              wayne Wayne Siu
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                Resolved:

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