openstack team mailing list archive

Thread
Date

Server increasing load due increasing processes in D state

To: ubuntu-server@xxxxxxxxxxxxxxxx, "openstack@xxxxxxxxxxxxxxxxxxx" <openstack@xxxxxxxxxxxxxxxxxxx>
From: Alessandro Tagliapietra <tagliapietra.alessandro@xxxxxxxxx>
Date: Mon, 25 Feb 2013 12:29:15 +0100

Hello guys, 

at work we've the openstack controller that since some months started to increase its load after some days of uptime.

I've seen that the cause is that processes sometimes hangs and remain in D state.

I've used some combination of ps args to get these outputs:

http://pastebin.com/raw.php?i=LGGzGrWu
http://pastie.org/pastes/6332964/text
http://pastie.org/pastes/6332979/text

The hdd is a soft-raid1 over 2 disks, which SMART values are fine.

Commands like lsof, strace on a D process doesn't return.

Any idea on what could be the cause?

Thanks in advance

--

Alessandro Tagliapietra 
alexfu.it (http://www.alexfu.it)

Follow ups

Re: Server increasing load due increasing processes in D state
From: Alessandro Tagliapietra, 2013-02-25