[ale] Lost sar data?

[Jim Kinney]

That's the cron job I couldn't recall the name of. If it stops running, sar
data doesn't get saved.

On Dec 30, 2016 1:38 AM, "Raj Wurttemberg" <rajaw at c64.us> wrote:

> On my RHEL6 servers there is a cron job that calls sa and writes to the sar
> log files (/var/log/sa) every ten minutes:
>
> # run system activity accounting tool every 10 minutes
> */10 * * * * root /usr/lib/sa/sa1 1 1
>
> # generate a daily summary of process accounting at 23:53
> 53 23 * * * root /usr/lib/sa/sa2 -A
>
> (This is the default as installed by the sysstat pacakage)
>
> Kind regards,
> /Raj
>
>
> -----Original Message-----
> From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of Leam
> Hall
> Sent: Thursday, December 29, 2016 6:43 PM
> To: Atlanta Linux Enthusiasts <ale at ale.org>
> Subject: Re: [ale] Lost sar data?
>
> Hmm...these were 6 and 8 hour losses, so probably not a disk sync issue.
>
> On 12/29/16 15:19, Jim Kinney wrote:
> > Yes and no. It's stored in memory until a process writes it to disk.
> > Basic sar data is really just reading /proc for numbers. But that is
> > of course just in memory data. To store it requires a system process
> > that collects it. That usually runs in cron or as a daemon.
> >
> > On Thu, 2016-12-29 at 13:50 -0500, leam hall wrote:
> >> On different VM hard resets, I've noticed that sar data is lost. On
> >> one reset, all data prior to the reset (0000-reset) was missing, on
> >> another all data after (crash-2350) was missing.
> >>
> >> Any ideas why? Is the data stored in memory?
> >>
> >> --
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> > James P. Kinney III
> >
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>   Dec 2016
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