The update process mentioned “messed up” RRDs (whatever this means in detail) for 5 RRDs / INFOs, like this:
-| RRD files for host rad01 and service Filesystem / stored in files:
-| - /opt/omd/sites/prod/var/check_mk/rrd/rad01/Filesystem__.info
-| - /opt/omd/sites/prod/var/check_mk/rrd/rad01/Filesystem__.rrd
-| are messed up. Please restore them both from backup.
I’ve deleted them outright before I’d even started the updated site for the first time.
I’m going to monitor the behavior for a few more minutes, maybe to a convert-rrds for good measure? (but there wasn’t anything wrong beforehand, when changing RRD parameters in the past the convert-rrd was executed manually and finished just fine).
But doesn’t really look like it’s going to slow down by itself, here’s another example:
OMD[prod]:~$ grep "router01.*mem_lnx_total_used" var/log/cmc.log
2021-05-10 13:23:19 [6] [main] [RRD helper 21859] creating new RRD file for service "router01;Memory used", command: cmc_single;router01;Memory used;memused;;ramused;;swapused;;mem_lnx_total_used;21680128;mem_used_percent;32.305908;mem_used;21680128
2021-05-10 13:28:55 [6] [main] [RRD helper 1548] creating new RRD file for service "router01;Memory used", command: cmc_single;router01;Memory used;memused;;ramused;;swapused;;mem_lnx_total_used;21680128;mem_used_percent;32.305908;mem_used;21680128
2021-05-10 13:29:59 [6] [main] [RRD helper 1548] creating new RRD file for service "router01;Memory used", command: cmc_single;router01;Memory used;memused;;ramused;;swapused;;mem_lnx_total_used;21696512;mem_used_percent;32.330322;mem_used;21696512
2021-05-10 13:31:04 [6] [main] [RRD helper 1548] creating new RRD file for service "router01;Memory used", command: cmc_single;router01;Memory used;memused;;ramused;;swapused;;mem_lnx_total_used;21696512;mem_used_percent;32.330322;mem_used;21696512
2021-05-10 13:32:08 [6] [main] [RRD helper 1548] creating new RRD file for service "router01;Memory used", command: cmc_single;router01;Memory used;memused;;ramused;;swapused;;mem_lnx_total_used;21708800;mem_used_percent;32.348633;mem_used;21708800
2021-05-10 13:32:25 [6] [main] [RRD helper 1548] created RRD for service "router01;Memory used", metric mem_lnx_total_used
2021-05-10 13:51:20 [6] [main] [RRD helper 1548] created RRD for service "router01;Memory used", metric mem_lnx_total_used
2021-05-10 14:03:53 [6] [main] [RRD helper 1548] created RRD for service "router01;Memory used", metric mem_lnx_total_used
What happened between the first few lines, and the last three lines? I don’t know.
EDIT: Ah, the first few lines say “creating” and the last 3 “created”? So maybe everything’s fine once a corresponding 4th “created” entry appears, same amount as the “creating” lines before? (not sure if the single line in the beginning, before I restarted the instance yet again, counts and I need 5 “created” actually)