[TriLUG] load shooting up on large sequential copies

[Marvin Blackburn]

They are scsi behind a raid controller.
I have noted taht bdflush and kupdated chew up most of the cycles.

------------------
Marvin Blackburn
Systems Administrator
Glen Raven
"He's no failure.  He's not dead yet" --William Lloyd George

> -----Original Message-----
> From: trilug-bounces at trilug.org [mailto:trilug-bounces at trilug.org]On
> Behalf Of Jon Carnes
> Sent: Tuesday, September 02, 2003 2:08 PM
> To: Triangle Linux Users Group discussion list
> Cc: Red Hat Mailing List (E-mail)
> Subject: Re: [TriLUG] load shooting up on large sequential copies
> 
> 
> Not much help, but I know there are some tuning parameters 
> you can apply
> to certain ext3 partitions to help with large I/O operations. 
>  I usually
> just make those partitions ext2.
> 
> I almost always make /var ext2 especially on mail server or proxy
> server.
> 
> 500Mb is so small these days, that I'm surprised it is causing you any
> problems.  Are the drives involved IDE?
> 
> On Tue, 2003-09-02 at 13:13, Marvin Blackburn wrote:
> > We have a problem where the load shoots up as well as sys 
> cpu when we do
> > some large sequential copies.
> > We are copying two 500MB files from point a to point b.  
> Both filesystems
> > are ext3 on raid 5.
> > 
> > Does anyone have any ideas on what kernel tuneables might 
> help with this
> > problem, or what mount options my be helpful.
> > Thanks.
> > 
> 
> 
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