[mrtg] Re: MRTG performance

[Stefano Giraldo]

Hi Tobi,
first of all... Thank you for all of this! :)

I have the same problem explained by Pavel...
so, to use your patch I have to paste it in
MRTG_lib.pm... the problem is where?
At the begging? At the end?

Thank's.

Bye,

        Ste.

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----- Original Message ----- 
From: "Tobias Oetiker" <oetiker at ee.ethz.ch>
To: "Pavel Ruzicka" <pavouk at pavouk.org>
Cc: "MRTG Mailinglist" <mrtg at list.ee.ethz.ch>
Sent: Tuesday, May 25, 2004 11:57 PM
Subject: [mrtg] Re: MRTG performance


> Hi Pavel,
>
> try this patch ...
>
> --- MRTG_lib.pm~        2004-05-25 23:48:40.190268000 +0200
> +++ MRTG_lib.pm 2004-05-25 23:56:15.083306000 +0200
> @@ -1450,7 +1450,7 @@
>      my $reread = shift;
>      my $snmpoptions = shift || {};
>      return if defined $$confcache{$host} and not $reread;
> -
> +
>      my $snmp_errlevel = $SNMP_Session::suppress_warnings;
>      $SNMP_Session::suppress_warnings = 3;
>
> @@ -1466,6 +1466,7 @@
>      # it seems that some devices only give back sensible data if their
tables
>      # are walked in the right ordere ....
>      foreach my $node (@nodes) {
> +       next if time - $confcache->{___deadhosts}{$host} < 300;
>         $SNMP_Session::errmsg = undef;
>         @ret = snmpwalk(v4onlyifnecessary($host, $ipv4only), $snmpoptions,
$node);
>         unless ( $SNMP_Session::errmsg){
> @@ -1481,9 +1482,15 @@
>                   }
>               };
>         } else {
> +           $confcache->{___deadhosts}{$host} = time
> +               if $SNMP_Session::errmsg =~ /no response received/;
>             debug('snpo',"Skipping $node scanning because $host does not
seem to support it");
>         }
>      }
> +    if (time - $confcache->{___deadhosts}{$host} < 300){
> +       $SNMP_Session::suppress_warnings = $snmp_errlevel;
> +       return;
> +    }
>      $SNMP_Session::errmsg = undef;
>      @ret = snmpwalk(v4onlyifnecessary($host, $ipv4only), $snmpoptions,
"ifPhysAddress");
>      unless ( $SNMP_Session::errmsg){
>
>
>
> cheers
> tobi
> May 12 Pavel Ruzicka wrote:
>
> > Hi,
> >
> > > oh I see what is hititng you ... you use reference names for
> > > accessing targets and because they do not resolve, mrtg tries to
> > > repopulate the cache ... in that case it does currently NOT detect
> > > dead hosts ... will look into it ...
> > >
> > > cheers
> > > tobi
> >
> > It's great information. I will be very grateful, when you implement this
> > function ;-)
> >
> > Best regards,
> >
> > Pavel Ruzicka
> >
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