Thanks. I found that in the release notes of 14.2.22:
"This release sets bluefs_buffered_io to true by default to improve performance
for metadata heavy workloads. Enabling
this option has been reported to occasionally cause excessive kernel swapping
under certain workloads. Currently, the
most
Hi,
Global swappiness and per-cgroup swappiness are managed separately. When you
change vm.swappiness sysctl, only /sys/fs/cgroup/memory/memory.swappiness
changes, but not memory.swappiness of the services under separate slices (like
system.slice where ceph services are running).
Check https:
Found some option that seemed to cause some trouble in the past,
`bluefs_buffered_io`, it has been disabled/enabled by
default a couple times (disabled on v15.2.2, enabled on v15.2.13), it seems it
might have a big effect on performance
and swapping behavior, but might be a lead.
On 08/16 14:10
Hello David,
Unfortunately "vm.swapiness" dose not change the behavior. Tweaks on the
container side (--memory-swappiness and --
memory-swap) might make sens but I did not found any Ceph related suggestion.
Am Montag, dem 16.08.2021 um 13:52 +0200 schrieb David Caro:
> Afaik the swapping beha
Afaik the swapping behavior is controlled by the kernel, there might be some
tweaks on the container engine side, but
you might want to try to tweak the default behavior by lowering the
'vm.swapiness' of the kernel:
https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/pe
