> I've always liked sysstat for this, as its almost totally invisible > in terms of system load but has a wealth of information for diagnosing > chronic problems. As was pointed out elsewhere, this doesn't show you the > brief spikes, but getting those involves a lot more data collection. :-P
are you aware just how light-weigh frequent collection is? collectl does 10 second samples of maybe twice as much data as sar plus 1 minute samples of all process and slab data. uses about 0.1% of the cpu and even less if you leave off the process/slab data. and collectl is written in perl! Just think how much more efficiently sar could do it. but then you'd lose the benefit of all collectl's additional features. ;) > So if a customer is taken on, then installing something like sysstat > should be one of the first recommendations. but only if you take 10 second samples. otherwise install/start collect which is already configured at that sampling rate by default. > Of course, there's also Landscape, if you're so inclined to hand over > a little cash, you get a lot of this built in (and a lot more ;) re rdd, which was mentioned in an earlier note. I tried loading collectl data into rrd and as soon as I found the plots are not accurate, I stopped using it. stick with gnuplot like colplot does. -mark -- ubuntu-server mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-server More info: https://wiki.ubuntu.com/ServerTeam
