From: "Jeff Busch" <jbusch@half.com>
To: <linux-kernel@vger.kernel.org>, <roswell-list@redhat.com>
Subject: [problem] RH 2.4.7-2 kernel slows to a crawl under heavy i/o
Date: Wed, 22 Aug 2001 16:57:35 -0500 [thread overview]
Message-ID: <NEBBJGKHGENBAPAMDILGIEFGGOAA.jbusch@half.com> (raw)
machine: Compaq Proliant DL360 w/4GB mem, dual 36GB SCSI drives
OS: RedHat 7.1 + errata updates, kernel-enterprise-2.4.7-2.i686.rpm from
'Roswell 2'
Under heavy I/O (Apache and a custom C++ module which do lots of mmap and
munmap calls over large data sets - 7GB total), the machine slows to a
crawl. The problem persists even after live traffic to the machine ceases.
A top listing shows both cpu's at 100% system. Any commands (ps, uname,
whatever) take minutes to return results.
The same setup on RH 6.2 with 2.4.3-ac3 works fine. Please let me know what
information may be useful to debugging this problem (no oops yet), and other
kernels to try; I'm looking at 2.4.8-ac9 right now.
Thanks,
Jeff Busch
System Administrator
Half.com - an eBay company
next reply other threads:[~2001-08-22 21:57 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-08-22 21:57 Jeff Busch [this message]
2001-08-22 22:12 ` Alan Cox
2001-08-23 10:26 ` Francois Romieu
2001-08-22 23:35 ` David Lang
2001-08-23 1:10 ` Jeff Busch
2001-08-23 3:39 ` Jeff Busch
2001-08-23 3:31 ` Daniel Phillips
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