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Performance almost non-existant how to trace bottleneck

Posted on 2006-07-19
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Last Modified: 2006-11-18
I'm confused.

I have a windows 2003 server that runs a range of applications for video transcoding. Performance is today almost non-existant - system idle process eating 85% - 90% of processor power when 3 other applications are crawling along and not running as they should.

system is dual xeon 2.8Ghz

I've restarted the server. No change.

I can't see what the problem is. Network use is running at 0.5% - 1% on a gig-e interface. Free physical ram is 760MB, average cpu load is 10-20% but there are processor hungry applications taking ages to run and not eating cpu cycles that seem to be free.

system calls per second is running at a mean of 13290 per sec, min 7200, max 24000
context switches per second mean 6400

any ideas as to how best to establish where the bottleneck is or what the problem is??

Roger

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Question by:i2mc
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mdiglio earned 750 total points
ID: 17140952
Hello,
Are you experiencing slowness on the user end of these video transcoding applications?
It is more likely a network issue.

system idle process is a percentage of system cpu that is idle.
It does not mean that this process is using 90% of your processing power.
So system idle process at 85-90% is a good thing.

check your network connections configured speed by
right click the connection > properties > on the 'general' tab click 'configure' > on the 'advanced' tab what is the value of 'speed & duplex' ?
Whatever setting it is on, verify that the port that the server is on is set for that speed.
If its set to 'auto' change it to 1000 MB full and set the port to the same.

Changes to any of these settings will result in a short loss of connectivity so only do these steps when the time is right,
but you can still check them for troubleshooting purposes
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by:mdiglio
ID: 17140960
one more thing...what type of server is it ?
some, like HP, will have their own utility to change/verify those network settings
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by:i2mc
ID: 17141174
>So system idle process at 85-90% is a good thing.

Not really - I see your point but the applications are only running at a few % cpu speed rather than the 20% - 60% they should be - video xcoding is cpu intensive to put it mildly.

> If its set to 'auto' change it to 1000 MB full and set the port to the same.

Would love to - but it's a broadcom netXtreme Gigabit ethernet and the only manual settings are 10/100/half/full ... to get 1000MB you seem to have to set Auto.

It's a dell 2650 FWIW

Roger
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by:i2mc
ID: 17142217
The issue was that a network attached storage device had dropped from 22MB/s read speed to 1MB/s - no idea why, all diagnostics are good but the system is in a remote datacentre so hard to check absolutely everything. A reboot of that device cured the problem so you were quite correct to imply that network connectivity was the most likely cause.

Cheers
Roger
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by:mdiglio
ID: 17142234
Glad you got it working!
Thanks for the points
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