[smokeping-users] Smokeping performance tracking

[Tobias Oetiker]

JonG,

there is significant performane to be gained by having sufficient
cache on your box so that all active rrds stay n cache ... in
rrdtool 1.3 we did some work to reduce the 'pre rrd' cache
requirements ...

if rrdtool does not finisch a round of updating in time, it will
say so in its logs ...

cheers
tobi

Today Fred Skrotzki wrote:

> The bottle neck I'm betting is the disk IO on the rrd files.  Take a
> look at using better disks/disk setup, storing the rrd files seperate
> from the OS drive and swap.  Raid 1, 0 or 10 will help a lot.
>
> ________________________________
>
> From: smokeping-users-bounces at lists.oetiker.ch
> [mailto:smokeping-users-bounces at lists.oetiker.ch] On Behalf Of Jon
> Greaves
> Sent: Wednesday, September 12, 2007 3:18 AM
> To: smokeping-users at lists.oetiker.ch
> Subject: [smokeping-users] Smokeping performance tracking
>
>
>
> Hi Tobi,
>
> Just an idea for tracking how smokeping is performing could you get
> smokeping to graph the time each probe takes to run. That way you should
> get a good indication if you are pushing a single probe to hard.
>
> We have does some basic testing our setup is with 130 groups and around
> 950 devices with the following results
>
> Setup: 20 ping every 5 mins 1 probe
> Result: the machine struggled to finish 1 full probe cycle under 300
> seconds
>
> Setup 20 pings every 5 mins 1 probe per group (130 probes in total)
> Result: waitio time hit 100% and eventually the box crashed
>
> Setup 10 pings every 5 mins 1 probe per group (130 probes in total)
> Result: waitio time hit 100% and eventually the box crashed but took
> longer than above
>
> Setup 10 pings every 5 mins 10 probes split across the 130 groups
> Result: stable but not sure how much overhead we have (see above idea
> for tracking)
>
> We are hoping to push the setup up to 2000+ devices monitored once we
> get to that I'll post back some additional results.
>
> Current hardware spec
> OptiPlex GX520
> Intel 1 * P4 HT 3.4gHz
> 2Gb RAM
>
> JonG
>
>
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-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902