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тАО01-27-2006 06:38 PM
тАО01-27-2006 06:38 PM
i have heard that we normally do not use sar for collecting performance data as it gives incorrect result most of the time. is it true ? what should we use in place of sar then ?
thanks,
shiv
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тАО01-27-2006 06:47 PM
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тАО01-27-2006 06:51 PM
тАО01-27-2006 06:51 PM
Re: use of sar
SAR is a good tool to collectsystem performance datas. It provides you with good deal of information. Glanceplus is a good alternate to sar. But, it is $$$.
-Arun
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тАО01-27-2006 06:52 PM
тАО01-27-2006 06:52 PM
Re: use of sar
it is preferrable that you use measureware.
you can configure automatic gathering and reporting using appropriate line on cron.
/opt/perf/bin/extract -xp -r /home/shiv/zgbltemplate -g -b today 00:00 -e today 23:59 -f stdout | /bin/mailx -s 'Server1: Measureware Performance report' shiv01@yourserver.mu >/dev/null 2>&1
and the template can be configured accordingly.
e.g.
# more /home/shiv/zgbltemplate
REPORT "MWA Export on !SYSTEM_ID"
FORMAT ASCII
HEADINGS ON
SEPARATOR="|"
SUMMARY=60
MISSING=0
DATA TYPE GLOBAL
YEAR
DATE
TIME
GBL_CPU_TOTAL_UTIL
GBL_MEM_UTIL
GBL_SWAP_SPACE_UTIL
GBL_MEM_CACHE_HIT_PCT
GBL_DISK_UTIL_PEAK
GBL_FS_SPACE_UTIL_PEAK
GBL_MEM_PAGEOUT_RATE
GBL_MEM_SWAPOUT_RATE
GBL_MEM_QUEUE
You can then use the data to plot appropriate graphs.
Of course there are many other tools that can use. Some of them come from the Openview Suite.
hope this helps!
kind regards
yogeeraj
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тАО01-27-2006 06:55 PM
тАО01-27-2006 06:55 PM
Re: use of sar
No the information provided by sar is always correct and simply clarifies the utilization of the resources. The reason for not using sar most of the time is because it gives very basic information of various parameters together. A detailed information about all of these parameters can be found indivisually by top, vmstat, iostat, vxstat etc.
Also if you have something like glance then you could get more realistic/captured information.
HTH,
Devender
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тАО01-27-2006 09:42 PM
тАО01-27-2006 09:42 PM
Re: use of sar
If you are testing an application's performance on Unix OS, if you really want mission critical datas about IO/Sec, threads, pages, etc.. NetIQ is the best tool. You can setup counters and it collects data per sec or milli sec, post them to server, where you can do manipulation/graphs etc..
http://www.netiq.com/
-Arun
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тАО01-28-2006 01:50 AM
тАО01-28-2006 01:50 AM
Re: use of sar
http://www.sarcheck.com
Also, HP has something called System Health Check (lite version is free):
http://h20293.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=SHCBASE01
I too also use measureware:
root's cron:
55 23 * * 1-5 /opt/perf/bin/extract -xp -r /home/gwild/zgbltemplate -g -b today 7:00 -e today 18:00 -f stdout | /bin/mailx -s 'svr003 performance report' gwild >/dev/null 2>&1
# cat /home/gwild/zgbltemplate
REPORT "MWA Export on !SYSTEM_ID"
FORMAT ASCII
HEADINGS ON
SEPARATOR="|"
SUMMARY=60
MISSING=0
DATA TYPE GLOBAL
YEAR
DATE
TIME
GBL_CPU_TOTAL_UTIL
GBL_MEM_UTIL
GBL_SWAP_SPACE_UTIL
GBL_MEM_CACHE_HIT_PCT
GBL_DISK_UTIL_PEAK
GBL_FS_SPACE_UTIL_PEAK
GBL_MEM_PAGEOUT_RATE
GBL_MEM_SWAPOUT_RATE
GBL_MEM_QUEUE
Rgds...Geoff
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тАО01-28-2006 06:41 PM
тАО01-28-2006 06:41 PM
Re: use of sar
sar is a good utility to get snap shot of system resources utilisation. You may also use licensed product like Glance pack to get similar data
Regards
Mahesh
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тАО01-29-2006 04:21 AM
тАО01-29-2006 04:21 AM
Re: use of sar
When I had an oracle performance problem and called HP support a few years ago they gave me what become these scripts:
http://www.hpux.ws/system.perf.sh
They needed some work and one was broken, but in the end, sar as all you need for a good non-graphical picture of performance.
Direct answer to your question. No. Not true. Properly patched and properly used sar does give good answers.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО01-29-2006 05:15 PM
тАО01-29-2006 05:15 PM
Re: use of sar
Choose glance tool for monitoring. Which is very good.
--
Muthu