70.

-----Original Message-----
From: u2-users-boun...@listserver.u2ug.org 
[mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Dan Fitzgerald
Sent: Monday, February 04, 2013 2:06 PM
To: u2-users@listserver.u2ug.org
Subject: Re: [U2] [UV] Large File Operations Kill Linux


What's the value in /proc/sys/vm/swappiness?
 
> From: perry.tay...@zirmed.com
> To: u2-users@listserver.u2ug.org
> Date: Mon, 4 Feb 2013 20:53:13 +0000
> Subject: Re: [U2] [UV] Large File Operations Kill Linux
> 
> We're on RHEL5 (2.6.18-348.el5), ext3 and 132GB ram.
> 
> -----Original Message-----
> From: u2-users-boun...@listserver.u2ug.org 
> [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Symeon Breen
> Sent: Monday, February 04, 2013 9:23 AM
> To: 'U2 Users List'
> Subject: Re: [U2] [UV] Large File Operations Kill Linux
> 
>  A few questions - What linux version/distro are you on and what type of
> file system, and how much ram do you have
> 
> -----Original Message-----
> From: u2-users-boun...@listserver.u2ug.org
> [mailto:u2-users-boun...@listserver.u2ug.org] On Behalf Of Perry Taylor
> Sent: 04 February 2013 15:57
> To: U2-Users List
> Subject: [U2] [UV] Large File Operations Kill Linux
> 
> Looking for some ideas on how to keep Linux from becoming largely
> unresponsive when creating large files.  What happens is as the new file is
> being created the I/O buffer cache quickly fills up with dirty buffers.
> Until the kernel can flush these out to disk there is no avail buffers for
> I/O operations from other processes.  .  The most troubling manifestation of
> this is the transaction logging check point daemon gets *way* behind putting
> us as risk if we were to have a failure of some kind.
> 
> I have tried using ionice and renice to slow the file creation down as much
> as possible.  This help a little but is still a big problem.  Any ideas how
> to get CREATE.FILE/RESIZE to play nice on Linux?
> 
> Thanks.
> Perry
> Perry Taylor
> Senior MV Architect
> ZirMed
> 888 West Market Street, Suite 400
> Louisville, KY 40202
> www.zirmed.com<http://www.zirmed.com/>
> 
> 
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