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Re: Memory usage problem - solved
On Mon, 23 Feb 1998, Tuvik Beker wrote:
> Hi,
>
> Thanks to everyone who suggested explanations.
> A solution was found empirically, but the reasons are still a bit
> obscure.
> Turned out that the problem had to do with the huge swap I used. A while
> ago one of the users asked me for extra swap space on that machine, to
> run some particularly memory demanding calculations. I used several swap
> partitions and swap files that added up to a total of more than 1G swap
> (in addition to 256MB RAM).
> Apparently managing all that swap caused severe memory problems, though
> the reason for that isn't clear to me. Anyway, I played with it a little
> bit, and managed to stabilize it with about 512M swap on 4 swap
> partitions.
> If anyone cares to guess what the actual reason for the problem was, I'm
> still very curious to hear an explanation.
It looks like Linux kernel virtual memory bug
>
> While we're at it - If one does need very large swap, there is a problem
> with the limits. Swap partitions are limited to less than 130M, and the
> number of them is also limited (to about 5 I think) trying to 'swapon'
> more partitions results in 'device unknown' (or something similar)
> errors. That forces one to use swap files, which is really ugly. Any way
> to use larger swap partitions, or many of them?!
>
> Tuvik
>
> --
> _______________________________________
> Tuvik Beker
> becket@shum.huji.ac.il
> Tel. 03-5714436 Fax. 03-5334349
> _______________________________________
>
>
>
>
Alexander Indenbaum
baum@actcom.co.il