From: Andrew Morton <akpm@osdl.org>
To: Badari Pulavarty <pbadari@us.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org
Subject: Re: Memory pressure handling with iSCSI
Date: Tue, 26 Jul 2005 11:11:10 -0700 [thread overview]
Message-ID: <20050726111110.6b9db241.akpm@osdl.org> (raw)
In-Reply-To: <1122399331.6433.29.camel@dyn9047017102.beaverton.ibm.com>
Badari Pulavarty <pbadari@us.ibm.com> wrote:
>
> After KS & OLS discussions about memory pressure, I wanted to re-do
> iSCSI testing with "dd"s to see if we are throttling writes.
>
> I created 50 10-GB ext3 filesystems on iSCSI luns. Test is simple
> 50 dds (one per filesystem). System seems to throttle memory properly
> and making progress. (Machine doesn't respond very well for anything
> else, but my vmstat keeps running - 100% sys time).
It's important to monitor /proc/meminfo too - the amount of dirty/writeback
pages, etc.
btw, 100% system time is quite appalling. Are you sure vmstat is telling
the truth? If so, where's it all being spent?
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next prev parent reply other threads:[~2005-07-26 18:11 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-26 17:35 Badari Pulavarty
2005-07-26 18:04 ` Roland Dreier
2005-07-26 18:11 ` Andrew Morton [this message]
2005-07-26 18:39 ` Badari Pulavarty
2005-07-26 18:48 ` Andrew Morton
2005-07-26 19:12 ` Andrew Morton
2005-07-26 20:36 ` Badari Pulavarty
2005-07-26 21:11 ` Badari Pulavarty
2005-07-26 21:24 ` Andrew Morton
2005-07-26 21:45 ` Badari Pulavarty
2005-07-26 22:10 ` Andrew Morton
2005-07-26 22:48 ` Badari Pulavarty
2005-07-26 23:07 ` Andrew Morton
2005-07-26 23:26 ` Badari Pulavarty
2005-07-27 0:31 ` Andrew Morton
2005-07-27 1:20 ` Martin J. Bligh
2005-07-27 1:26 ` Andrew Morton
2005-07-27 1:47 ` Martin J. Bligh
2005-07-27 1:31 ` Badari Pulavarty
2005-07-27 1:40 ` Andrew Morton
2005-07-26 19:31 ` Sonny Rao
2005-07-26 20:37 ` Badari Pulavarty
2005-07-26 21:21 ` Andrew Morton
2005-07-26 20:59 ` Rik van Riel
2005-07-26 21:05 ` Badari Pulavarty
2005-07-26 21:33 ` Martin J. Bligh
2005-07-26 22:05 ` Adam Litke
2005-07-26 21:12 ` Andrew Morton
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