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  1. Couchbase Server
  2. MB-38454

regular indexer CPU time on otherwise idle system

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Details

    • Bug
    • Resolution: Won't Fix
    • Major
    • None
    • 6.5.0
    • storage-engine
    • CentOS 7.2.1511
    • Untriaged
    • Centos 64-bit
    • Unknown

    Description

      With a new install from a package, installed Couchbase Server 6.5. Added the travel-sample bucket. Left the system idle for approximately two days. This is <35k documents and about 6 indexes, IIRC.

      Expected behavior:
      Idle system is, well, idle.

      Observed behavior:
      Indexer process has regular CPU usage not commensurate with system activity. In fact, memory is not commensurate either.

      I did not do any go profiling, but basic top sorted by time and strace -c -f -p are attached. The strace indicates for ~10s of wall clock time, there is ~7s of futex() syscall time. About 8% of those futex() syscalls end in error.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MB-23577 Indexer hogging CPU on build spock-2447 on mac

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MB-27433 constant indexer CPU/memory usage on otherwise idle system

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MB-37810 Increase in indexer CPU utilization after upgrading to 6.5

          • Major - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. MB-29216 [Plasma] consider cpu tuning for QuotaSwapper

          • Major - Major loss of function.
          • Closed
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              Dmitriy.Kalugin-Balashov Dmitriy Kalugin-Balashov
              ingenthr Matt Ingenthron
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              Dates

                Created:
                Updated:
                Resolved:

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