> From: [EMAIL PROTECTED] > Subject: Re: [PCI] Virtual memory > > At 02:32 PM +1000 06/22/2004, David Elmo wrote: >>> Photoshop is one of those programs that doesn't like VM. It has its >>> own virtual-memory scheme which will conflict with system VM. >> >> Not quite sure if this is right in respect to PS? Is there any stated info >> by Adobe that there is any actual conflict? PS likes you to have a scratch >> disk different to the vol on which VM is and also (btw) different to the one >> which has any large files you are editing. > > It is 100% correct, +/- your definition of "conflict". Well > documented on Adobe's web sites, Photoshop's docs, USENET, and > various other forums. > > Photoshop caches temp data in basically three ways: normal temp files > on disk, special scratch disk partitions, RAM. > > The algorithms used to cache data are a faux virtual memory. They're > so poorly implemented, they cause the Mac OS' virtual memory manager > to thrash. They often easily drag HFS/+ formatted hard drives to > their knees. > > Adobe's fix for this is for you to: > a) make fewer modifications on your image (save, quit, relaunch often), > b) add lots of real memory, > c) dedicate a HD scratch partition or preferrably a whole HD, > d) turn off virtual memory, > and > e) blame Apple. > > > IMO, Adobe needs a kick in the a**. Apps like GraphicConverter > perform the same functions without the whole thrash problem! If GC > et al can do it, why can't Adobe? ObConspiracy: How much stock in > the RAM manufacturers does Adobe own? :) > > - Dan.
OK Dan, I am sure you have *something* here. But I don't know about your "100%" correct" remark. My PS 5 shows no trouble with VM on, perhaps because I have 500 MB of real? I still would like a pointer to references by PS that clearly acknowledge trouble with VM on when there is plenty of RAM. I had a quick look at Adobe and did not see what I would have expected to see if it was "100% correct". Nor in my help files on PS 5. One obvious trouble with VM where real is scarce is the slowness of system and PS program resources having to be read back and forth from HDs. But this is not "thrashing" about. It is just slowness. I have HFS+ on my HDs. David Elmo Since your post arrived Dan, I have noticed my PS icon eye winking at me. What's this about? :) -- 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:[EMAIL PROTECTED]> 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/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
