From ef26503cd89230dfa62892d312126916f7305526 Mon Sep 17 00:00:00 2001 From: Kamoltat Date: Fri, 19 Nov 2021 23:10:30 +0000 Subject: [PATCH] PendingReleaseNotes: update release notes Update the pending release notes explaining why we are making the autoscaler profile `scale-up` by default. Signed-off-by: Kamoltat --- PendingReleaseNotes | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/PendingReleaseNotes b/PendingReleaseNotes index 4bbf36c37b45e..75b50b45e5633 100644 --- a/PendingReleaseNotes +++ b/PendingReleaseNotes @@ -41,12 +41,19 @@ quick-fix/repair commands are invoked. Relevant tracker: https://tracker.ceph.com/issues/53062 +* MGR: The pg_autoscaler will use the 'scale-up' profile as the default profile. + 16.2.6 changed the default profile to 'scale-down' but we ran into issues + with the device_health_metrics pool consuming too many PGs, which is not ideal + for performance. So we will continue to use the 'scale-up' profile by default, + until we implement a limit on the number of PGs default pools should consume, + in combination with the 'scale-down' profile. + >=16.2.6 -------- -* MGR: The pg_autoscaler has a new 'scale-down' profile which provides more - performance from the start for new pools. However, the module will remain - using it old behavior by default, now called the 'scale-up' profile. +* MGR: The pg_autoscaler has a new default 'scale-down' profile which provides more + performance from the start for new pools (for newly created clusters). + Existing clusters will retain the old behavior, now called the 'scale-up' profile. For more details, see: https://docs.ceph.com/en/latest/rados/operations/placement-groups/ -- 2.39.5