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Re: Degradation of GNU/Hurd ``system performance''

From: Svante Signell
Subject: Re: Degradation of GNU/Hurd ``system performance''
Date: Thu, 22 Sep 2011 15:18:56 +0200

On Thu, 2011-09-22 at 04:45 +0200, olafBuddenhagen@gmx.net wrote:
> Hi,
> On Mon, Sep 05, 2011 at 06:42:22AM +0200, olafBuddenhagen@gmx.net wrote:
> > As recently I aquired the (bad) habit of running my system 24/7,
> > almost never voluntarily rebooting, I was able to make further
> > observations.
> I totally forgot to mention another important bit: the growing swap
> consumption can be triggered "reliably" simply by installing a lot of
> Debian packages -- doing an "apt-get upgrade" for example. (I
> occasionally observed growing memory usage with other commands doing I/O
> on large amounts of data as well; but couldn't pinpoint any specific
> situations so far... Perhaps it's just some randomly triggered bug
> accumulating dead objects in memory or something like that?)

Regarding memory usage, when building packages that hangs/are
interrupted many processes are not terminated and I
see /usr/bin/faked-tcp and hurd/fifo instances still in the process
list. Are there timeouts for dead processes?

What does the STAT letters f,m, o, p, w stand for, they are not
explained by the ps(1) man page, only uppercase ones (except s and l).

Examples are:
several /bin/bash -c fail=... in state Sw
several /usr/bin/make in state Sw
several /hurd/fifo in state So
several /usr/bin/faked-tcp in state Ssfo
several  /bin/bash -noprofile /dev/fd/3 in state Sslo

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