jj_uk Posted December 6, 2021 Share Posted December 6, 2021 (edited) How can I find out what's causing the massive disk IO that occurs each day at 12-noon ? It's causing some containers to fall over. 3:30am is my CA backup, 8am my Duplicati backup begins, transferring to a different server, and it finishes at around 10:30am so I expect to see high disk and network usage peek a this time, but I have no idea what the 12-noon disk usage is? ssdtrim runs every hour, other than that, I have no idea. Edited December 6, 2021 by jj_uk Quote Link to comment
Squid Posted December 6, 2021 Share Posted December 6, 2021 Plex? Mover? One of the arrs scanning? Multitude of apps have scheduled tasks. iotop from NerdPack (also requires Python 2.7) may help figure it out. Quote Link to comment
jj_uk Posted December 7, 2021 Author Share Posted December 7, 2021 (edited) 12:00: 12:12: (seems back to normal) : Edited December 7, 2021 by jj_uk Quote Link to comment
Squid Posted December 7, 2021 Share Posted December 7, 2021 Looks like it's trimming (Dynamix SSD Trim Settings under Scheduler). Makes sense for the containers to all pause etc as no other I/O can happen to the device while a trim is in progress Quote Link to comment
jj_uk Posted December 7, 2021 Author Share Posted December 7, 2021 (edited) Yes, I have the trim setting set to hourly. Is manually trimming on a schedule really required? Can the OS just trim when it deletes something instead? Edited December 7, 2021 by jj_uk Quote Link to comment
Squid Posted December 7, 2021 Share Posted December 7, 2021 BTRFS will do that. XFS won't. Hourly is a bit much to run it though. Daily or weekly during off hours is more than sufficient Quote Link to comment
jj_uk Posted December 7, 2021 Author Share Posted December 7, 2021 My cache drives are using btrfs, so i'm ok to just disable it? Quote Link to comment
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