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Problem with CPU usage 25-30 % with no running Queries

andrews2018andrews2018 ContributorCurrent User Role Contributor
we have a Problem with CPU usage when adding a Percona 8 Server into PMM. The CPU utillization goes to 25-30 Percent even with no queries running.
Even when no Parameters are set for Query Analysis this load exists so it is probably either the Linux Metrics or most likely the MySQL Metrics.
Can u confirm this?
We will test with Percona 5.7 as well.
Kind Regards


  • andrews2018andrews2018 Contributor Current User Role Contributor
    also happens with Percona 5.7 latest ( 5.7.25-28)
    PMM is latest version (1.7.1)
    tested under Ubuntu 16.04 latest and 18.04 latest

    the metrics causing it is mysql:metrics
    when stopping it on the client the CPU usage goes down
    when starting again it goes up again
  • andrews2018andrews2018 Contributor Current User Role Contributor
    more tests revealed: also happens with PMM 1.7.0
    does not appear with MySQL 5.6.43

    no problems with upstream MySQL 8.0.15 either
    just default install and pmm-admin add mysql
  • andrews2018andrews2018 Contributor Current User Role Contributor
    unfortunately no answer to this
    not a lot of activity in the forums by percona stuff it seem just users helping each other out...
    i also created a Jira Isse for this no answer there either

    tested with latest Percona Server for MySQL 8.0.15-5 and issue still remains
    any help appreciated
    kind regards
  • lorraine.pocklingtonlorraine.pocklington Percona Community Manager Legacy User Role Patron
    Hey there, I'll see if anyone has an answer for you. And THANK YOU for raising the JIRA.
    But it's also GREAT if the community can help you out too.
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