On Wednesday 2023-05-17 15:01, Pit Suetterlin via openSUSE Users wrote:
Date: Wed, 17 May 2023 15:01:18 From: Pit Suetterlin via openSUSE Users <users@lists.opensuse.org> Reply-To: Pit Suetterlin <pit@astro.su.se> To: users@lists.opensuse.org Subject: Re: "background idle" syncing of filesystems
Paul Neuwirth via openSUSE Users wrote:
(Hardware is a SAS Hardware RAID 1 (megaraid_sas with 2 2TB SAS HDDs)).
Wild guess:
It tries to do an fstrim on the volume, and the megaraid_sas does not pass that through. I have the same issue with one here, that trim isn't supported.
interesting theory. any way to prove it? and if in doubt, how to disable? thank you and I could recreate the issue, after 6 days uptime with high I/O. from /proc/vmstat: nr_dirty 571064 nr_dirty_threshold 24894434 nr_dirty_background_threshold 12432019 from top: MiB Mem : 515896.2+total, 6047.250 free, 15834.02+used, 501647.4+buff/cache and finally: # date; sync; date Tue May 23 05:49:06 AM CEST 2023 Tue May 23 05:59:44 AM CEST 2023 -> syncing took > 10 minutes. regards, Paul Neuwirth