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тАО03-06-2009 05:04 AM
тАО03-06-2009 05:04 AM
Re: How can I gather performance history for redhat linux
As for dm, there is a slight trick in that when I display total disk usage not to include the dm numbers.
I have played a tad with virtual environments such as netware, to at least make sure collectl will run in them and it does. But I haven't done anything with virtual disks, at least not yet. If you care to shoot me an email with an extract from /proc/diskstats I might be able to add support and let you try it out for me. ;-)
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тАО03-06-2009 08:06 AM
тАО03-06-2009 08:06 AM
Re: How can I gather performance history for redhat linux
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тАО03-06-2009 08:13 AM
тАО03-06-2009 08:13 AM
Re: How can I gather performance history for redhat linux
On the other hand have you heard of tlviz? It's actually a visual basic tool designed for plotting VMS data but is general enough that with a couple of minor tweaks I was able to convert collectl output to the format it prefers. For those heavily committed to sar I'd suggest converting its output to something tlviz can read and you won't be sorry. It can overlay data from multiple systems on the same plot, generate trend lines and all other kinds of fancy features I haven't seen anywhere else. And yes, it is freeware. Just google it.
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тАО03-06-2009 12:59 PM
тАО03-06-2009 12:59 PM
Re: How can I gather performance history for redhat linux
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тАО03-06-2009 02:52 PM
тАО03-06-2009 02:52 PM
Re: How can I gather performance history for redhat linux
I am really enjoying working with collectl, thanks for the tips. I especially love the plot flag (-P) when using gnuplot.
Great tool!
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тАО03-10-2009 10:57 AM
тАО03-10-2009 10:57 AM
Re: How can I gather performance history for redhat linux
Thank you for your input. In reading the thread and being a new user to collectl (looks like a great tool now have it running 20 blade servers) do have a few questions:
1. How can I modify the collectl output to read by tlviz. We use tlviz to read performance info from our EVA's so I'm familar with the tool.
2. How would you use gnuplot to view collectl output?
3. What options would you recomend to use to run collectl. Here is snippet of the config file
DaemonCommands = -f /var/log/collectl -r00:01,14 -m -F60 -s+CDFNYZ. Believe this line tells collectl what to collect.
Thank you for your response
Norm
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тАО03-10-2009 11:03 AM
тАО03-10-2009 11:03 AM
Re: How can I gather performance history for redhat linux
Thank you for input, looks like the thread was helpful for several of us. Thanks for the ksar post.
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тАО03-10-2009 12:23 PM
тАО03-10-2009 12:23 PM
Re: How can I gather performance history for redhat linux
- I wrote a utility to convert collectl plot data to tlviz readable data, but it's not open source! Send me an email and an HP customer I'll give you a copy.
- Using gnuplot for plotting is a little more complicated but it can be done. If you're not a gnuplot user you may have a lot of reading to do OR you could read the data into something like Excel and use its plotting facility, OR I have another non-open source tool I can share that calls gnuplot for you.
- when I run collectl I don't change anything in collectl.conf and just run it as is.
The whole thing about -s can be confusing in that it controls both the collection as well as display, noting collectl collects the same data whether you specific a lower or upper case letter! If you use lowercase c, on playback you only set CPU summary data which is typically enough. You can always play it back again with -sC if you really think you need details. Same goes for all the -sdfn. Make sense? Try this:
collectl -c5 -scdn -f/tmp
and you'll get a file with 5 samples. Now play it back with
collectl -p /tmp/xxx
and you'll see summary data for cdn. Now play it back with
collectl -p /tmp/xxx -sCDN
and you'll see detail. You can even mix 'n match OR try -scdnCDN and get everything.
enjoy
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тАО03-11-2009 10:08 AM
тАО03-11-2009 10:08 AM
Re: How can I gather performance history for redhat linux
Just sent you a email, not knowing your email address I'm hoping I'm sending it to the right place.
Norm
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тАО03-12-2009 06:44 AM
тАО03-12-2009 06:44 AM
Re: How can I gather performance history for redhat linux
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