My 2ยข on this interesting topic is inserted below: David Elmo wrote: > > > From: lovek <[EMAIL PROTECTED]> > > Subject: Re: [PCI] ram doubler question > > > >>> From: ken ross <[EMAIL PROTECTED]> > >>> Subject: Re: [PCI] ram doubler question > >>> > >>> i think that it's the fact that it [VM] uses a lump of your HD to do the > >>> biz gives > >>> it a bad rep, so compared the way RD behaves of course it's going to look > >>> bad . > >> > >> Remind me how RD works if it does not use HD space... > >> > >> David Elmo > >> > > > > it stuffs and de stuffs the files being placed in the physical ram, > > makin the ram seem bigger since the files are smaller. > > Interesting idea. My understanding of VM is that HD is used when real RAM is > used up. If it is not needed you do not get a slow down. If the RD stuffing > occurs as default this would be whether the real could not cope or not and > would seem to mean you would get a slow down. Perhaps it is better overall > to have it for smaller real ram configurations? Though surely real ram is > cheap enough these days, how much is this RD suitable for a PowerPC running > 9x? > > As it happens, this conversation has jinxed my machine! The other day it > would not start because it said it could not find VM... I am looking into > it. (This is a powerfully evil Mac news group!) > > David Elmo > > Quoting David again: > > Interesting idea. My understanding of VM is that HD is used when real RAM > is used up. If it is not needed you do not get a slow down. If the RD stuffing > occurs as default this would be whether the real could not cope or not and > would seem to mean you would get a slow down. > When VM is turned on, whatever is allocated for it, that same amount of VM is subtracted from the HDD space. Seems to me that all memory is stored on the HDD and real RAM is not even used, whereas RAM Doubler doesn't decrease the size of the HDD, as VM does. Here is an excerpt from RD's *ReadMe*:
"For most Macs, RAM Doubler makes virtual memory obsolete - RAM Doubler provides better performance without decreasing hard drive space. And for Power Macs, RAM Doubler provides 'file mapping', which reduces the memory footprint of Power Mac native applications; do a Get Info on a Power Mac native application to find much memory is saved by using RAM Doubler's file mapping." I've not used RD or VM since getting 192 real RAM on my 8500, but am going to reload once again to see if I notice any change in speed, er wut ivver. ReadMe says I will only get 256MB, or 2x the 128MB max. which RD can double. But RD is great for those Macs starving for real RAM. I have used it a lot, on such. Didn't try it on OS 9.1, before I lost the OS because of HDD that went deep south. BTW- anyone have OS 8.6 or 9.1, willing to let go of it, for my PM8500? I have an app. for digi JamCam- specs require min. of OS 8.5 (8.6 is better, but my copy of it doesn't load--"a problem reading the Tome") I'm 'stuck with 8.1', now. If so, contact me off list, if that's the proper edi-ket to cut down on list clutter. Anyone want the ReadMe? Give a holler-it may send, but RD requires master disk. TYVM- Jim Kilponen (who seeked list help sev. mos. ago-8500's running good!) -- PCI-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> PCI-PowerMacs list info: <http://lowendmac.com/lists/pci-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:pci-powermacs@mail.maclaunch.com> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/pci-powermacs%40mail.maclaunch.com/> iPod Accessories for Less at 1-800-iPOD.COM Fast Delivery, Low Price, Good Deal www.1800ipod.com
