Date: Wed, 20 Jun 2007 12:20:03 -0700 From: Jeremy Chadwick <koitsu@FreeBSD.org> To: David Cross <dcross@okcupid.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Very slow sed... Message-ID: <20070620192003.GA72641@eos.sc1.parodius.com> In-Reply-To: <20070620100737.S56928@max.okcupid.com> References: <20070620100737.S56928@max.okcupid.com>
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On Wed, Jun 20, 2007 at 10:24:01AM -0400, David Cross wrote: > Ok the subject line is misleading.. but I don't know how else to put it. I > have a machine on which SOME programs are slow. VERY SLOW. Other programs > run just fine. I cannot seem to find the source of the problem. Two things I can think of: 1) Memory issues -- memtest86 could help show this kind of problem. Try removing memory, and if the problem continues, swapping the pair you removed with the pair that's installed. 2) Disk issues -- reading /usr/bin/sed off the disk where there's a soon-to-be-bad block. The disk may be trying to work around it and doing a delayed read (inducing EC). This seems less likely to be the case than bad memory, but I've seen it happen. -- | Jeremy Chadwick jdc at parodius.com | | Parodius Networking http://www.parodius.com/ | | UNIX Systems Administrator Mountain View, CA, USA | | Making life hard for others since 1977. PGP: 4BD6C0CB |
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