What is the difference between sar -B verses sar -W

Posted by Mark on Server Fault See other posts from Server Fault or by Mark
Published on 2014-08-20T20:19:17Z Indexed on 2014/08/20 22:22 UTC
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linux

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system

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system-monitoring

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sar

I am trying to understand why my system is running slowly. I found the sar command, but wanted to know the difference between sar -B and sar -W

I read the man page, and I understand that -B gives me the paging statistics and -W gives me the swapping statistics. What I would like to understand is the following:

What is the correlation between the two sets of statistics.

When should I be concerned about -B and when about -W? ie, what values from each command should I be concerned with?

Which statistic is more closely related to system performance

Thanks

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