Re: load increase after 2.4 -> 2.6 upgrade

[Andrew Miehs <andrew@2sheds.de>]

The way load is calculated has changed between 2.4 and 2.6

What does 'uptime' have to say?

Your 'wa' is pretty high.... Should probably do something about your 
disk system....

What does ps have to say? how many processes are in waiting?

Cheers

Andrew

On Mar 28, 2005, at 9:56 PM, Aaron Thoreson wrote:

> Top shows lots of qmail-local processes as waiting or sleeping, but 
> they pop off and are replaced pretty quickly by others (this is a mail 
> server).  Tasks stays around 170, 99% of which are sleeping. 
> Additionally, the server is responsive...  The previously-mentioned 
> associate and I even began to wonder if perhaps 'top' didn't count 
> differently the same load :) ?
>
> Here is the output of vmstat (split across two lines for clarity)
>
> procs -----------memory---------- ---swap--
>  r  b   swpd   free   buff  cache   si   so
>  1  9      0 954120      0 1024624   0    0
>
>
> -----io---- --system-- ----cpu----
> bi    bo   in    cs us sy id wa
> 32    25    9    31  9  7 63 20
>
> Idle stays > 60% most of the time and Wait hangs around 20% to 30%.
>
> It should be noted that this server is handling no more mail than it 
> did running 2.4.19.  ACPI and APMS are not enabled.  Only loaded 
> modules are 'sg' 'rtc' '8250' and 'serial_core'.
>
>
> Henrique de Moraes Holschuh wrote:
> > On Mon, 28 Mar 2005, Aaron Thoreson wrote:
> > > I have a few machines running 2.4.19.  I've upgraded them to 2.6.9.  
> > > I run xfs and use the backports.org version of mod-init-tools, 
> > > procps and xfsprogs.  I've had no problems to speak of, except on 
> > > some servers, where the load has gone from a low average 2 or 3 to 
> > > stabilizing at 12-14.  An associate with a similar setup on his 
> > > machines saw the same thing.
> > What does atop (if you have accounting set up) or top says?  What 
> > about
> > vmstat ?
>
> --
> Aaron Thoreson
> Network Group
> Midcontinent Communications
> aaront@midco.net
>
>
> --
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