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Data retention for prometheus & QAN for PMM appliance.

I see the doc's mention how to manage this if running PMM in Docker, but can't seem to find out how to change the retention period for QAN and prometheus in the appliance. Any insight would be great. Thanks.


  • bckimbckim Contributor Current User Role Beginner
    as I know

    we can manage the retnetion period for QAN and prometheus like this :

    docker run -d \
    -p 80:80 \
    --volumes-from pmm-data \
    --name pmm-server \
    --restart always \

    --note added by Percona Community Manager, going forward using pmm-server:n rather than pmm-server:latest is best practice, our advice changed since the user wrote this post. In this case pmm-server:1 would have been appropriate for these code examples.
  • single.track.mindsingle.track.mind Entrant Current User Role Beginner
    I see you running PMM in docker. That's not my situation.

    To be clear, i'm trying to change retention for the PMM Virtual Appliance running in a virtualized environment.

  • hostedpowerhostedpower Entrant Current User Role Supporter
    want to know this as well, any info? :)
  • MykolaMykola Percona Percona Staff Role

    First of all - it is not recommended to do any changes directly in configs.
    Potentially you can get broken system because PMM has configuration service which also makes changes in configs.
    PMM Team is working on adding "Setting page" for all kind of images.

    for METRICS_MEMORY it is not needed to change anything, it changes automatically according to your instance size.
    if you want to change anyway, fix option inside /usr/lib/systemd/system/prometheus.service
    for METRICS_RETENTION change --storage.local.retention value inside /etc/sysconfig/prometheus
    for QUERIES_RETENTION change INTERVAL in /etc/cron.daily/purge-qan-data

    please remember - after such changes, you can get a broken PMM during some actions like - external exporters adding, etc.
  • BroncoBronco Entrant Current User Role Contributor
    I think that the file to be modified is

    vi /etc/supervisord.d/pmm.ini
    ... --storage.local.retention=1440h0m0s ...
    a stop start of the pmm-server is required for changes to be efective.
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