Hi,
having a small ceph-19.2.3 cluster for RGW workload. index-pool is on
separate SSD class. PG autoscaler is enabled in warning mode only.
Cluster health is:
# ceph health detail
HEALTH_WARN 1 pools have too many placement groups
[WRN] POOL_TOO_MANY_PGS: 1 pools have too many placement groups
Pool default.rgw.buckets.index has 64 placement groups, should have 32
When merging PGs down to 32, the opposite is shown:
# ceph health detail
HEALTH_WARN 1 pools have too few placement groups
[WRN] POOL_TOO_FEW_PGS: 1 pools have too few placement groups
Pool default.rgw.buckets.index has 32 placement groups, should have 64
It seems not the autoscaler who raises health warning here (NEW PG_NUM is
empty):
# ceph osd pool autoscale-status
POOL SIZE TARGET SIZE RATE RAW CAPACITY RATIO
TARGET RATIO EFFECTIVE RATIO BIAS PG_NUM NEW PG_NUM AUTOSCALE BULK
.mgr 23812k 3.0 384.0G 0.0002
1.0 1 warn False
.rgw.root 20480 3.0 384.0G 0.0000
1.0 32 warn False
default.rgw.log 23905k 3.0 384.0G 0.0002
1.0 32 warn False
default.rgw.control 0 3.0 384.0G 0.0000
1.0 32 warn False
default.rgw.meta 575.2k 3.0 384.0G 0.0000
4.0 32 warn False
default.rgw.buckets.index 3017M 3.0 384.0G 0.0230
4.0 64 warn False
default.rgw.buckets.non-ec 0 3.0 384.0G 0.0000
1.0 32 warn False
default.rgw.buckets.data 10678G 3.0 374.2T 0.0836
1.0 1024 warn True
Anyone knowing from where this health warning is coming and how to stop
the ping-pong?
Thanks, Sascha.
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