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Koozali.org: home of the SME Server
Obsolete Releases
SME Server 9.x
Topic:
mdadm eating up CPU with no I/O load
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mdadm eating up CPU with no I/O load
5 Replies
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jwmw
10
+0/-0
mdadm eating up CPU with no I/O load
«
on:
July 28, 2018, 03:23:07 PM »
Hi everyone,
at my parents home I have an SME Server with a recent quadcore and 8 GB of RAM. Since a month everytime I look into top the process mdadm is taking ~ 95% CPU
I restarted the process but after a few minutes the same picture
The raid itself is healthy. A reboot and installing all updates didn't help.
Any thoughts??
«
Last Edit: July 28, 2018, 03:25:16 PM by jwmw
»
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Fumetto
874
+1/-0
Re: mdadm eating up CPU with no I/O load
«
Reply #1 on:
July 30, 2018, 01:37:28 AM »
I remember something about a raid test, an automatic procedure, I think it started at 4:00 AM (but not sure)...
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jwmw
10
+0/-0
Re: mdadm eating up CPU with no I/O load
«
Reply #2 on:
July 30, 2018, 11:05:23 AM »
Thanks Fumetto,
for that hint. Unfortunatly this process occupies one thread 24/7
not sure what mdadm does whole the time.
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craig
10
+0/-0
Re: mdadm eating up CPU with no I/O load
«
Reply #3 on:
July 31, 2018, 05:27:05 PM »
Is there any disc activity?
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ReetP
3,731
+5/-0
Re: mdadm eating up CPU with no I/O load
«
Reply #4 on:
July 31, 2018, 06:09:04 PM »
Not sure why it is firing itself like this.
Have you done any mods to the server at all?
I guess first have a look in /etc/cron.d
There should be a file called raid-check
[root@home etc]# cat /etc/cron.d/raid-check
# Run system wide raid-check once a week on Sunday at 1am by default
0 1 * * Sun root /usr/sbin/raid-check
What do these show?
Code:
[Select]
cat /proc/mdstat
Code:
[Select]
cat/etc/mdadm.conf
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...
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Jean-Philippe Pialasse
2,762
+11/-0
aka Unnilennium
Re: mdadm eating up CPU with no I/O load
«
Reply #5 on:
August 15, 2018, 10:01:02 PM »
check your disks with smartctl short and long test (or any already logged errors), you might have a defective disk.
I saw this few months ago, and it happened to be a drive about to die.
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Koozali.org: home of the SME Server
Obsolete Releases
SME Server 9.x
Topic:
mdadm eating up CPU with no I/O load