Re: RFT: updatedb "morning after" problem [was: Re: -mm merge plansfor 2.6.23]

From: Rene Herman
Date: Sat Jul 28 2007 - 03:21:44 EST


On 07/27/2007 09:43 PM, david@xxxxxxx wrote:

On Fri, 27 Jul 2007, Rene Herman wrote:

On 07/27/2007 07:45 PM, Daniel Hazelton wrote:

Questions about it:
Q) Does swap-prefetch help with this?
A) [From all reports I've seen (*)]
Yes, it does.

No it does not. If updatedb filled memory to the point of causing swapping (which noone is reproducing anyway) it HAS FILLED MEMORY and swap-prefetch hasn't any memory to prefetch into -- updatedb itself doesn't use any significant memory.

however there are other programs which are known to take up significant amounts of memory and will cause the issue being described (openoffice for example)

please don't get hung up on the text 'updatedb' and accept that there are programs that do run intermittently and do use a significant amount of ram and then free it.

Different issue. One that's worth pursueing perhaps, but a different issue from the VFS caches issue that people have been trying to track down.

Rene.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/