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  1. Couchbase Server
  2. MB-11840

3.0 (Beta): Views periodically take 2 orders of magnitude longer to complete

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Details

    • Task
    • Resolution: Won't Fix
    • Major
    • feature-backlog
    • 2.5.1, 3.0
    • view-engine
    • Security Level: Public
    • Single Node running version 3.0.0 enterprise edition (build-918). Running on VirtualBox, assigned 8 vCPUs and 8GB memory. (host has 24 cores, 128GB RAM).

    Description

      Hi Alk,

      I can demonstrate the behaviour of views periodically taking 2 orders of magnitude longer with 3.0.
      (Similar to the issue we were investigating relating to Stats Archiver).

      See output-3.0, x-axis is just a count of view queries. Test ran for ~53 minutes and completed 315408 view (~100 second). The y-axis is view response time (in seconds).

      In general the response time is < 0.01 of a second. However occasionally (9 out of 315408 views) it takes > 0.1. This may be considered acceptable in the design of the Server, but wanted to get confirmation.

      To replicate the test, run...

      while true; do ./curlscript.sh >> times2.txt 2>&1 ; done

      I have provided curlscript.sh as an attached file.

      The generated workload is test data from the same customer that hit the Stats Archive Issue
      Create a bucket named "oogway" and then do a cbtransfer of the unpacked backup.tgz file (see attached).

      Attachments

        1. backup.tgz
          3.62 MB
        2. curlscript.sh
          0.1 kB
        3. output-251.png
          output-251.png
          5 kB
        4. output-3.0.png
          output-3.0.png
          5 kB
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            dhaikney David Haikney (Inactive)
            owend Daniel Owen
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            Dates

              Created:
              Updated:
              Resolved:

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