Re: [tlug] meaning of dprofpp output

["Keith Bawden" <keith@example.com>]

On 8/1/07, Nguyen Vu Hung <vu-hung@example.com> wrote:
> Keith Bawden さんは書きました:
> > I cannot help with reading the output of dprofpp. However, What is the
> > status of the process when viewed using "ps -aux" ?
> >
> > Regards, Keith
> >
> >
> I see it with top. httpd's memory grows as I see it. After 5 or 10
> seconds, it grows to
> 70-80% and the system hangs, I can not even tail -f the log file.
>
> # ps -aux looks like this
> # USER       PID %CPU %MEM   VSZ  RSS TTY      STAT START   TIME COMMAND
> # xxx 20153  0.3 80.9 418540 207092 ?     D    15:44   0:05
> /apache/bin/httpd

There you go. Process state is "D". Which is uninterpretable sleep.
Now check the IO Wait whilst you run the same process. These commands
may be of use:

iostat -xtc 5 3
sar -u 2 5

If the IO Wait is high you have now narrowed things down a bit. If not then ...

Regards, Keith