[CentOS] questions relate to "sar"

Fernando Hallberg fernando at flexdigital.com.br
Fri Dec 25 16:08:09 UTC 2009


chkconfig sysstat on
service sysstat start



On Fri, 25 Dec 2009 07:48:21 -0800
John R Pierce <pierce at hogranch.com> wrote:

> mcclnx mcc wrote:
> > We have CENTOS 5.3 on DELL server.  I tried to use "sar -b" or "sar -u" and it only show report starting on 12:00 A.M.
> >
> > my questions are:
> >
> > 1. for "sar -u" or "sar -b" how can I generate two or three days ago report?
> >
> > 2. how to generate daily report from "sa2 " peocess?
> >   
> 
> I suggest reading the man pages on sar, and associated functions.
> 
> sar -f /var/log/sa/sa22 would process the data for the 22nd, see what
> files you have available in /var/log/sa/ ... my system seems to be
> keeping 18 days worth.
> 
> sa2 is used to create the daily reporrt files described above. If you
> want to create a daily report in a specific format, you'll probably want
> to write your own script that you invoke from crontab
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-- 
Fernando Hallberg <fernando at flexdigital.com.br>
Flex Digital Soluções em Redes de Dados
http://www.flexdigital.com.br


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