Date: Sat, 2 May 1998 00:43:41 -0400 From: "Scott A. Kenney" <saken@rmta.ml.org> To: Berend de Boer <berend@pobox.com> Cc: "'FreeBSD stable'" <freebsd-stable@FreeBSD.ORG> Subject: Re: swap_pager: out of swap space, only power off did help Message-ID: <19980502004341.14009@rmta.ml.org> In-Reply-To: <01BD754F.A0AB9EF0.berend@pobox.com>; from Berend de Boer on Fri, May 01, 1998 at 10:22:28PM %2B0200 References: <01BD754F.A0AB9EF0.berend@pobox.com>
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[-- Attachment #1 --]
According to Berend de Boer:
> My quite stable freebsd stable halted today with "swap_pager: out of swap
> space". Only a reboot did help. But within minutes this message came again.
> Help! I'm running stable from a few weeks ago.
>
> 1. What has happened?
>
> As far as I know someone send me a large (3MB) message, which sendmail
> spooled to /var/spool/mqueue (at least there I found it) and procmail tried
> to deliver it, without luck however. But /var/mail still did have 15MB
> free, so what could be wrong? This is a 16MB machine with a 40MB swap
> space.
This is a well known problem with procmail on FreeBSD.
The attached message contains a patch for procmail which solves the
problem.
--
Scott Kenney >|< saken@rmta.ml.org
[-- Attachment #2 --]
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Re: Procmail with huge messages (was Re: Can there be rules that only parse the
headers?)
_________________________________________________________________
* From: Andre Albsmeier <Andre.Albsmeier@mchp.siemens.de>
* To: luomat+procmail@luomat.peak.org (Timothy J Luoma)
* Cc: procmail@Informatik.RWTH-Aachen.DE
* Date: Tue, 14 Oct 1997 22:31:34 +0200 (CEST)
* Message-Id: <199710142031.WAA05368@curry.mchp.siemens.de>
_________________________________________________________________
> Author: era eriksson <era@iki.fi>
> Original-Date: Mon, 13 Oct 1997 09:09:34 +0300 (EET DST)
> Message-ID: <199710130609.JAA19818@kontti.Helsinki.FI>
>
> > I still think it's kind of embarrassing that Procmail would not be
> > able to cope with big messages. If the normal local MDA could handle
> > it, why can't Procmail?
>
> Procmail blew chunks all over a 9meg email I received this weekend.
>
> Sucked all available CPU and swapspace (about 250megs and a P-133).
>
> Got lots of duplicate emails and lost emails in the resultant disk crash(es)
> which required manual fsck-ing.
I had got this also on my FreeBSD machine with 64MB RAM and 250MB
swap. No message bigger than 5-8 MB was possible. However, as I was
told from the vm and malloc experts of FreeBSD, that this is due
to the silly way how procmail reads messages: It always reallocs
memory in 16k chunks until the message fits into (virtual) memory.
With this info, I made a quick and dirty hack to procmail, and
now it delivers 64MB messages on the same machine and that really
quick. It now allocs 4MB chunks which, on a modern system, only
get used if there is actually written to it.
*** src/pipes.c.ORI Mon Apr 28 02:27:47 1997
--- src/pipes.c Fri Sep 19 13:23:18 1997
***************
*** 234,239 ****
--- 234,240 ----
char*readdyn(bf,filled)char*bf;long*const filled;
{ int i;long oldsize;
+ long fetched = *filled;
oldsize= *filled;
goto jumpin;
do
***************
*** 243,249 ****
if((size_t)*filled>=(size_t)(*filled+BLKSIZ))
lcking|=lck_MEMORY,nomemerr();
#endif
! bf=realloc(bf,*filled+BLKSIZ); /* dynamically adjust the buffer size
*/
jumpback:;
}
while(0<(i=rread(STDIN,bf+*filled,BLKSIZ))); /* read
mail */
--- 244,253 ----
if((size_t)*filled>=(size_t)(*filled+BLKSIZ))
lcking|=lck_MEMORY,nomemerr();
#endif
! if( fetched - *filled < BLKSIZ ) {
! fetched += 4194304;
! bf=realloc(bf,fetched); /* dynamically adjust the buffer size */
! }
jumpback:;
}
while(0<(i=rread(STDIN,bf+*filled,BLKSIZ))); /* read
mail */
-Andre
_________________________________________________________________
References to:
Timothy J Luoma <luomat+procmail@luomat.peak.org>
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