munin, cacti or similar with <= 1 min granularity

fishjohn · 04-16-2010, 01:42 AM

Hi

We are doing some stress tests on servers and need to monitor load, IO and other stuff.
Well munin and cacti seem to be quite OK for that, with only 1 problem - 5 min granularity is too much. We need to CLEARLY read out data with MAX 1 min interval ( smaller interval would be better ).
That means besides really collecting data with <=60sek interval,
on graph every tick must be clearly readable.

Thanks in advance for all suggestions

centosboy · 04-16-2010, 03:04 AM

Quote:

Originally Posted by fishjohn

Hi

We are doing some stress tests on servers and need to monitor load, IO and other stuff.
Well munin and cacti seem to be quite OK for that, with only 1 problem - 5 min granularity is too much. We need to CLEARLY read out data with MAX 1 min interval ( smaller interval would be better ).
That means besides really collecting data with <=60sek interval,
on graph every tick must be clearly readable.

Thanks in advance for all suggestions

Remember, it is only a cron job which runs the munin/cacti updater.
This can be set to 1 minute if you wish, but then this could only work if the previous run had completely finished in that minute.
So it just really depends how many devices that needed monitoring really. If there are a lot, then running more frequently then 5 mins might create an overlap.

Just my thought..

fishjohn · 04-21-2010, 07:22 AM

i use serverstats, it lets you to configure rrdtool-s interval and graphs width/height.

Btw changeing cronjob interval for munin is not helping. Rrdtool settings are what count, and for munin afaik these are not changeable outofthebox. Probably doable with little hacking, but Im currently ok with serverstats.