HI Steven,

This issue has been around mailing lists since the new version came out:

https://lists.ceph.io/hyperkitty/list/ceph-users@ceph.io/thread/S5XBS63NFIBJHN44RQ4NES7F6GVIMH4T/

This is a new warning that can be adjusted or muted if uncomfortable but its advisable to check what’s causing this.

We had a few warnings once upgraded to 19.2.2 and a single OSD restart vanished them away. Haven’t seen these warnings ever since.

Best,

Laimis J.

On 13 May 2025, at 06:55, yite gu <yitegu0@gmail.com> wrote:

bdev_async_discard_threads more than 1 issue have been fixed at 18.2.7. pls
use `top -H -p <osd pid>`  observe osd thread cpu load, is there any
abnormal situation? And what abnormal logs are there in osd log?

Steven Vacaroaia <stef97@gmail.com> 于2025年5月13日周二 02:18写道：

Hi,

After a cephadm upgrade from 18.2.2 to 18.2.7 that worked perfectly,
I am noticing lots ( 42 out of 161 OSDs ) "slow operations in bluestore"
errors

My cluster has all 3 types of OSDs ( NVME, SSD, HDD+ journaling)

I found some articles mentioning below setting but it did not help

Anyone else having this issue ?

Thanks
Steven

    bdev_enable_discard: "true" # quote
     bdev_async_discard_threads: "1" # quote
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