December 6, 20214 yr 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, 20214 yr by jj_uk
December 6, 20214 yr 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.
December 7, 20214 yr Author 12:00: 12:12: (seems back to normal) : Edited December 7, 20214 yr by jj_uk
December 7, 20214 yr 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
December 7, 20214 yr Author 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, 20214 yr by jj_uk
December 7, 20214 yr 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
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