Hi,

Recently, I upgraded Ceph from 15.2.16 to 17.2.6, but I found that OSD CPU 
usage increased from 30% to 90% or more, and OSD subop_w_latency increased from 
600us to 5ms. This is incredible.

My hardware environment:

12 nodes x 12 NVMe (Intel P4510 4T)

I tried to set the OSD configuration to the default value and saw no 
improvement either.

 

Have you ever encountered this problem?
What might have gone wrong?


Best regards,
Tony Yao
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