topic Re: Performance Monitoring in Operating System - Linux

Performance Monitoring

Caster Troy — Mon, 30 Mar 2009 06:53:20 GMT

Hey Folks,

I have a DL580 G3 with 8GB RAM and I am planning to upgrade it to 16GB. I want to monitor the performance of the server before doing the upgrade, and after adding a further 8GB I will again monitor and see as to how much performance is improved. How can I do this? Is there any tool in Linux for monitoring performance?

Re: Performance Monitoring

Ivan Krastev — Mon, 30 Mar 2009 07:24:47 GMT

Get GlancePlus trial for linux - https://h10078.www1.hp.com/cda/hpms/display/main/hpms_content.jsp?zn=bto&cp=1-11-15-28^9637_4000_100

regards,
ivan

Re: Performance Monitoring

Ivan Ferreira — Mon, 30 Mar 2009 11:37:21 GMT

There are a lot of tools, like sar, collectl, vmstat, iostat, top, free.

Depending of the system, just adding memory could not improve the performance without a related tuning, for example, database parameters.

If you don't already know the performance utilities in linux, how do you know that you need more memory? What if the performance problem is related to CPU or disk?

Also, the feedback from the end users is very important.

Re: Performance Monitoring

skt_skt — Wed, 01 Apr 2009 14:13:25 GMT

files under /var/log/sa are helpful.

#sar -f sa03.03202009 -A >sar.out

Re: Performance Monitoring

smatador — Wed, 01 Apr 2009 14:41:20 GMT

Hi,

With linux, you could also install nmon
http://www.ibm.com/developerworks/aix/library/au-analyze_aix/index.html
nmon is free and very interesting with some tools like nmon analyser. You could also put the graph on rrd
http://www.ibm.com/developerworks/wikis/display/WikiPtype/nmon

Re: Performance Monitoring

Steven E. Protter — Wed, 01 Apr 2009 15:19:21 GMT

Shalom,

You can port these scripts.

Command line options need work.

http://www.hpux.ws/?p=6

SEP

Re: Performance Monitoring

Court Campbell — Fri, 03 Apr 2009 15:50:39 GMT

I like collectl and munin.

Re: Performance Monitoring

Taifur — Sat, 04 Apr 2009 03:14:44 GMT

Hi caster,

You can check performance by sar command.

For details check man sar

#sar -d 1 3
#top
#vmstat
For details you can check below link,

http://linux.die.net/man/1/sar

Rgds//
Taifur

Re: Performance Monitoring

Sivakumar MJ._1 — Mon, 06 Apr 2009 05:57:23 GMT

Use sysstat

Sysstat contains following cmds.related to collecting IO&CPU Stats.

iostat,mpstat,sadc,sa1,sar,sa2,isag,sa,

The sysstat tools should be part of every system administrator's resource monitoring tool bag.

Re: Performance Monitoring

MarkSeger — Tue, 07 Apr 2009 15:13:54 GMT

re sysstat - why use a bunch of tools that produce their output in a hard to read format when you can use collectl that does everything they do and much more. see http://collectl.sourceforge.net/ for details.

One of the biggest mistakes I see people make with sar is running it at the default monitoring interval of 10 minutes, which results in mush for output. Please tell me that if you do use sar you use a monitoring frequency closer to 10 seconds as that's really the only real way to see what your system is doing.

-mark

Re: Performance Monitoring

William B. Parkinson — Tue, 07 Apr 2009 18:59:50 GMT

If you run Iostat and Sar before and after you will get a good Idea of what is happening. Hp provides CSVPNG and Tlviz as a great set of tools for anaylizing a system.
The are conversion tools available for the data.

Re: Performance Monitoring

MarkSeger — Tue, 07 Apr 2009 19:09:51 GMT

I'll second tlviz. I even have a utility to convert from collectl format to tlviz.
-mark

Re: Performance Monitoring

William B. Parkinson — Thu, 09 Apr 2009 14:09:33 GMT

I wrote sar iostat and ps to tlviz and csvpng and I use the most options I can on the collect. One system I had 196 disks generated over 2000 graphs for IOSTAT.
Sneak a peak at ANALINUX.com

Re: Performance Monitoring

William B. Parkinson — Thu, 09 Apr 2009 14:11:05 GMT

mark I agree about the default with sar. I use 20 seconds