hello

RRD are generated for each metrics (check with performance data), as far as I know there is no way to delete them as is, it needs to be done with knowing what to query in the database

however if the file have not been modified recently, meaning they are not linked to actively checked service, they could be safe to delete, but I would wait for a centreonian to confirm you can do that safely

this will tell you the size of all rrd older than 365 days (maybe even 30 days?)

find /var/lib/centreon/metrics -maxdepth 1 -type f -mtime +365 -print0 | du -hc --files0-from - | tail -n -1

to delete, here is the command:

find /var/lib/centreon/metrics -maxdepth 1 -type f -mtime +365  -exec rm {} \;

if you did an update of the platform and there are some checks that uses “global” metrics, or autodiscover, it can generate a lot of data because of new plugins, new checks… 

however, please consult this article Prerequisites | Centreon Documentation you should not have a 16GB partition for /var/lib/centreon

Hello ​@christophe.niel-ACT ,
Thank you for quick reply.
I have run command :- find /var/lib/centreon/metrics -maxdepth 1 -type f -mtime +365 -print0 | du -hc --files0-from - | tail -n -1
 

But as your mention im waiting centreonian to confirm i can remove those files safely.
Thank You.