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When using Ganglia , <br />
how can I find the root cause of CPU wait?<br />
Is it a graphical representation of wa in vmstat?
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When using Ganglia ,
how can I find the root cause of CPU wait?
Is it a graphical representation of wa in vmstat?

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Ganglia's gmond uses lots of OS calls/tools to gather its stats.<br />
<br />
As far as I know, CPU WAIT is determined by standard perflib calls which are also used by vmstat, mpstat or topas. I'm not aware of a gmond extension or feature using the PURR.
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Ganglia's gmond uses lots of OS calls/tools to gather its stats.

As far as I know, CPU WAIT is determined by standard perflib calls which are also used by vmstat, mpstat or topas. I'm not aware of a gmond extension or feature using the PURR.

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<div class="content wysiwyg-content">
<b>I have a confusion about the (CPU WAIT)</b><br />
<br />
1-Is CPU wait always a wait on I/O?<br />
<br />
2-will Memory and Virtual memory have anything to do with CPU wait?<br />
<br />
3-if a system has lots of CPU wait will adding more CPU or cores fix this problem?<br />
<br />
4-what is the best OS tool to report CPU wait other than VMSTAT?
</div>
</div>


I have a confusion about the (CPU WAIT)

1-Is CPU wait always a wait on I/O?

2-will Memory and Virtual memory have anything to do with CPU wait?

3-if a system has lots of CPU wait will adding more CPU or cores fix this problem?

4-what is the best OS tool to report CPU wait other than VMSTAT?

CPU WAIT

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Unix OS

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