Uploaded image for project: 'MariaDB MaxScale'
  1. MariaDB MaxScale
  2. MXS-223

Possible memory leak in gwbuf_alloc

    XMLWordPrintable

    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.1.1
    • Fix Version/s: 1.2.0
    • Component/s: readwritesplit
    • Labels:
      None

      Description

      Hello,

      I've experienced behavior which points to the memory leak in MaxScale 1.1.1.

      How to repeat:

      Decompress attached tarball, download and install pt-log-player from Percona Toolkit 2.1.11
      Open a screen with two sessions.
      In the first session run:
      while true ; do ps auxf | grep pt-log-player | awk '

      {print $2}

      ' | xargs kill -9 ; sleep 4s ; done
      In the second session run:
      while true ; do /root/percona-toolkit-2.1.11/bin/pt-log-player --play ./sessions --base-dir ./results h=your_IP,P=your_RWsplit_port,u=youruser,p=yourpass ; done

      After a while observe memory utilization growing:
      root@ip-10-10-92-43:~/massif# ps auxf | grep maxscale
      root 14056 0.6 48.3 2554104 1955360 ? Ssl 13:37 0:14 /usr/local/mariadb-maxscale/bin/maxscale

      Session files contain:

      root@ip-10-10-90-60:~/maxscale_debug# cat ./sessions/sessions-* | sort | uniq -c
      488571 SET AUTOCOMMIT=0
      486362 SET AUTOCOMMIT=1
      1973024 SET NAMES utf8

      MaxScale version:
      root@ip-10-10-92-43:~/massif# /usr/local/mariadb-maxscale/bin/maxscale --version
      1.1.1

      I've attached tarball with session files and massif report. For this test I've used single PXC instance in a readwritesplit router. readconnroute doesn't seem to be affected.

        Attachments

          Issue Links

            Activity

              People

              Assignee:
              markus makela markus makela
              Reporter:
              kksiazek Krzysztof Książek
              Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

                  Git Integration

                  Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.