[maemo-users] [maemo-users] Adding swap make system *LESS* stable

From: Frantisek Dufka dufkaf at seznam.cz
Date: Thu Jan 26 17:03:13 EET 2006
Hmm, I don't see this with my usage. I think swap is an improvement. But 
personally I don't understand complains about 24MB limitation. IMO 24 is 
more than enough. Even 16MB is a big improvement.

For best usage the swap should contain what is really not needed (like 
dead code and other inefficiency in libraries and other useless junk). 
16MB could be enough for swapping out this. I also think that the 
improvement seen is caused by different behaviour of VM when it knows it 
has some spare swap just in case without actually using it.

By really using swap in a big way I believe stability may be a problem 
indeed. But machine which is constantly swapping is not very usable 
anyway and in case of flash memory it is really bad idea. Nonfrequent 
swapping with reasasonable usage may not harm flash at all.

BTW anyone seen worse battery usage with swap turned on? I would guess 
swap keeps the MMC device open so the system cannot turn MMC controller 
off. But the card FAT partition is mounted all the time anyway so maybe 
it is not related. I just think my device have worse battery performance 
with swap turned on even if it is not swapping much.


David D. Hagood wrote:
> It seems to me that adding a 20M swap file makes my Nokia *less* stable, 
> not more. I've tried both swap files on a MMC card as well as swap 
> partitions, and in both cases it seems that I am more likely to crash 
> the browser with swap enabled than with swap disabled.
> Has anybody else seen this?

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