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[Bashar]

 What i ment by Huge apps like oracle DB , ldapm nostly DBs , from what i
you explain i can see the most worry is about the kernel and the iowait
others wont matter even if they reach higher values , no?

On Mon, 25 Dec 2000, Dale Ghent wrote:

> On Mon, 25 Dec 2000, Bashar wrote:
> 
> | Regards,
> | 	Can anyone explain each % and what does exactly mean and when/what
> | to worry about with servers hosting huge apps ?
> | 
> | Example:
> | CPU states: 78.7% idle,  3.3% user,  6.9% kernel, 11.1% iowait,  0.0% swap
> 
> I can explain what each category means (idle, user, etc) but your question
> about what to worry about in regards to running "huge apps" is too general
> and vague. I'll let you figure that out based on what I describe here.
> 
> idle percentage is just that; the prtcentage of time the *system* was idle
> during the sample period (the default is 5 seconds in top).
> 
> The user category is how much of the time the system spent running
> processes that made user-land library calls.
> 
> The kerel category measures the percentage of time the system spent
> processing system (kernel) calls (read(), write(), open() etc).
> 
> iowait measures the percentage of time the system spent waiting for IO
> operations to complete (from the disk and network).
> 
> /dale
> 
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