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Date: Wed, 11 Jul 2001 13:08:21 +0200
From: Corinna Vinschen <cygwin AT cygwin DOT com>
To: "'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com>
Subject: Re: heap error
Message-ID: <20010711130821.J8578@cygbert.vinschen.de>
Mail-Followup-To: "'cygwin AT cygwin DOT com'" <cygwin AT cygwin DOT com>
References: <AF057BED809BD41183D900306E009076014FC5 AT emrl1 DOT iwe DOT RWTH-Aachen DOT DE>
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In-Reply-To: <AF057BED809BD41183D900306E009076014FC5@emrl1.iwe.RWTH-Aachen.DE>; from bolten@IWE.RWTH-Aachen.de on Wed, Jul 11, 2001 at 11:26:59AM +0200

On Wed, Jul 11, 2001 at 11:26:59AM +0200, Bolten, Dierk wrote:
> In this case the server program dies after 2 hours or something with :
> 
> couldn't commit memory for cygwin heap, Win 32 error 487

Each Cygwin app gets a special heap area to hold stuff which is
inherited to child processes. Eg. all file descriptor structures
are stored in that heap area (called the "cygheap"). The cygheap
has room for at least 4000 file descriptor structures. But - that's
the clue - it's fixed size. The cygheap can't grow. It's size is
reserved at the application's start and it's blocks are commited
on demand.

For some reason your server application needs all the cygheap
space when running under the described conditions.

Just a guess: Does your server forget to close file descriptors?

Corinna

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Developer                                mailto:cygwin AT cygwin DOT com
Red Hat, Inc.

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