Virtual Memory Fragmentation and "top"

dLux (dlux@dlux.hu)
Fri, 17 Sep 1999 08:28:49 +0200


Hi!

I have observed a very strange thing.
I always run a "top" command in an X window, beacuse I like to
watch system data.
There was a buggy procps package in debian in last days, and top
was missing (2.0.3-1). Then I wrote my "top" script:
watch -n 1 'uptime; free; ps axuw --sort=-start_time'

Until that, my machine seems to be much more faster! It seems like
a computer, which has 128M memory(and it has). Before that I often
get constant swapping when I open a large window in netscape.
I feel that "top" fragments the virtual memory and the swap, but I
don't know how.
Sounds interesting?

I'm using 2.2.10 kernel with a "restricted proc" patch. But this
problem is stands from the early 2.2 until 2.2.10 (>2.2.10 I had
problems, that's why I use that).
I have tried 2.3.17 also, and it seems to have the similar
problem, but I have some strange IPC problems, so I didn't test it.

Do you have any idea about it?

Please Cc: to me this thread, because I am not subscribed to the
list.

Regards,

dLux

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