From:	 Alan Cox <alan@lxorguk.ukuu.org.uk>
To:	 jgarzik@mandrakesoft.com (Jeff Garzik)
Subject: Re: Plain 2.4.5 VM...
Date:	 Tue, 29 May 2001 09:51:50 +0100 (BST)
Cc:	 linux-kernel@vger.kernel.org (Linux Kernel Mailing List)

> Ouch!  When compiling MySql, building sql_yacc.cc results in a ~300M
> cc1plus process size.  Unfortunately this leads the machine with 380M of
> RAM deeply into swap:
> 
> Mem:   381608K av,  248504K used,  133104K free,       0K shrd,     192K
> buff
> Swap:  255608K av,  255608K used,       0K free                  215744K
> cached

That is supposed to hapen.  The pages are existing both in swap and memory but
not recovered. In that state the VM hasn't even broken yet. 

Where you hit a problem is that the 255Mb of stuff both in memory and swap
won't be flushed from swap when you need more swap space. That is a giant size
special edition stupid design flaw that is on the VM hackers list. But there
are only a finite number of patches you can do in a day, and things like
sucking completely came first I believe




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