X-Spam-Check-By: sourceware.org
From: "Dave Korn" <dave DOT korn AT artimi DOT com>
To: <cygwin AT cygwin DOT com>
Subject: RE: bash slow on first 'up-arrow'
Date: Mon, 27 Feb 2006 13:43:01 -0000
Message-ID: <01b501c63ba3$ba2542f0$a501a8c0@CAM.ARTIMI.COM>
MIME-Version: 1.0
Content-Type: text/plain; 	charset="us-ascii"
Content-Transfer-Encoding: 7bit
In-Reply-To: <4402FFBC.3060307@byu.net>
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
Precedence: bulk
List-Unsubscribe: <mailto:cygwin-unsubscribe-archive-cygwin=delorie DOT com AT cygwin DOT com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com

On 27 February 2006 13:34, Eric Blake wrote:

> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
> 
> According to Frank Greco on 2/26/2006 1:39 PM:
>> 
>> When I hit 'up-arrow' for the first time, there's a long delay (at least 30
>> secs) and the disk spins like crazy.  Then it seems to work fine, so it
>> seems to be looking for something the very first 'up-arrow'.
> 
> I've never seen anything like this, but wonder what your history settings
> are at.  If you have a huge HISTFILESIZE and HISTSIZE, it might just be
> that bash is spending a lot of time reading the history file into memory,
> possibly triggering some severe page swapping.  'man bash' provides more
> information about tailoring your history.  You could also use strace to
> see what bash is doing in response to the first up-arrow, including any
> files it is opening, although I will admit that reading an strace is not
> the easiest thing to decipher.


  Filemon from www.sysinternals.com might be a more user-friendly way of
diagnosing this one.


    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....


--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Problem reports:       http://cygwin.com/problems.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/