On 28/10/2023 09.38, Jeffrey Walton wrote:
On Fri, Oct 27, 2023 at 5:59 PM Eyal Lebedinsky <fedora@xxxxxxxxxxxxxx> wrote:
Fully updated F28.
I had to send one (of 7) member disk for RMA.
I notice that the system is very non responsive. 'top' shows
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1365697 root 20 0 0 0 0 R 93.8 0.0 384:40.55 kworker/u16:3+flush-9:127
This continues even when there are no user actions (ff, tb closed).
A few days ago it stopped, but today I see that it kept running all night where there were
period of inactivity for a few hours.
As another point: a few days ago I received a disk from RMA and the recovery went as fast as expected.
I then removed another disk to send for RMA.
Is this expected? Is there anything I can do to improve the situation?
If you have a hot spare and a lot of data, I could envision a
situation where a low priority thread takes several days to rebuild
the array. Or that has been my [limited] experience when failing over.
But it usually happens in the background, and does not affect
responsiveness too much.
Jeff
I do not think this is the situation. I do not have a spare.
$ cat /proc/mdstat
Personalities : [raid6] [raid5] [raid4]
md127 : active raid6 sdg1[5] sdf1[4] sdh1[6] sdc1[9] sde1[7] sdd1[8]
58593761280 blocks super 1.2 level 6, 512k chunk, algorithm 2 [7/6] [_UUUUUU]
bitmap: 84/88 pages [336KB], 65536KB chunk
unused devices: <none>
To show how slow it is, looking at iostat I see the writing is going at below 100KB/s.
I decided to pause (virsh save) a VM, which needs to write about 8GB.
It is now going for over 30m and completed about 3/4 of the job...
--
Eyal at Home (fedora@xxxxxxxxxxxxxx)
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