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  1. Couchbase Server
  2. MB-26518

Max throughput of pagination queries dropped by 10-20%

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Details

    • Bug
    • Resolution: Fixed
    • Major
    • 5.5.0
    • 5.5.0
    • query
    • Untriaged
    • Centos 64-bit
    • Yes

    Description

      At least Q17 and Q18 queries are affected:

      SELECT name, email FROM `bucket-1` WHERE capped_small > $1 ORDER BY capped_small LIMIT 10;
      

      SELECT name, email FROM `bucket-1` WHERE capped_small > $1 ORDER BY capped_small OFFSET 1000 LIMIT 10;
      

      See http://showfast.sc.couchbase.com/#/timeline/Linux/n1ql/pagination/MOI

      I tried other builds and it looks like regression was introduced in build 5.1.0-1321 after the following change:

      	godeps/src/github.com/couchbase/go_json changed from f9c04b0b12efd9dd911bdb45f8beec096a5934c9 to master
      		[+] df39143 MB-25907 make jsonpointer single pass
      

      Attachments

        For Gerrit Dashboard: MB-26518
        # Subject Branch Project Status CR V

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            marco.greco Marco Greco (Inactive)
            pavelpaulau Pavel Paulau (Inactive)
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            Dates

              Created:
              Updated:
              Resolved:

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                PagerDuty