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Re: Swapfile Partition/RAM size?
Authored by: cyberflyer on Dec 30, '03 10:01:49PM

> In my 1GB RAM/5GB Partition scheme, applications
> started crashing. BUT... my swap files themselves still
> had not reached 512 MB total! Yet VM use showed
> above 5GB using Activity Monitor! (Hence my apps
> dropping like flies.)

OK. This gives me the sensation that there is another parameter that needs to be adjusted in High RAM configurations. It seems that 512 MB of swap file space is generally plenty. The swapfiles run 80MB a piece, how many are you going to need at once?

Something else is making the apps crash, I suspect. 10MB of SwapDisk per 1 MB of RAM is overkill. The best older reccommendation I could find is 2:1 Disk:RAM.

If I install 4 GB of RAM, I'd need 40 GB of swap disk, which is, well, somehow excessive for 80 MB swap files when more RAM is supposed to reduce the amount of swapping VM bothers to do.

I bet there is another parameter in the Startup process that needs to be tweeked when you get up past 1 GB of RAM to smooth this problem out, but I'm not the guy to find it.

Anyone want to track this down?

My one gig Powerbook Pismo shows VM at:
VM: 4.68G + 77.5M 156(0) pageouts

My three (one gig is in the shop) Dual G5 shows VM at:
VM: 3.13G + 70.2M 0(0) pageouts


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