Hi John, what is it eating the memory up? Or is it Virtual Memory being Eaten, or Free Disk Space gone?
Open Activity Monitor in Applications>Utilities, select All Processes & sort on Real Memory, any indications there?
How much RAM & free space do you have also, click on the Memory & Disk Usage Tabs.
Open Console in Utilities & see if there are any clues or repeating messages when this happens.
In the Memory tab of Activity Monitor, are there a lot of Pageouts?
I'd point you to the Activity Monitor too. In the lower area choose System Memory. Look at the Free and Inactive memory. Together they constitute your total free memory. If you still have some it's all good. Don't worry about much else but do check your Page Outs. They are cumulative since the last boot so if you haven't rebooted in 6 months the number could be really high and hard to interpret. As described above you can see which processes are using what amount of Real Mem. Virtual Mem has no meaning. Editing music may not be too memory intensive but it certainly has the potential to be an issue with 8GB. I'm currently using 12GB of real mem for Photoshop, Lightroom, Firefox and FCPx along with a group of less demanding apps. With 8GB ram you may learn it's best to quit all your other programs or you may learn you're fine....learning to understand the Activity Monitor helps greatly with that.
John, BD is quite right, page outs are indicative of not enough physical memory. If that's the case, disk space becomes the priority as any cache gets temporarily written to disk. Not the speediest solution.
However, I've also noticed that dormant sessions get written to disk, rather than sit in physical mem.
As my disk space decreases, my Mac runs slower ...
I've found 8Gb of ram to be adequate for most apps, including Photoshop, iTunes unless you intend to run background apps like burning DVDs, re-rendering images, while watching a film remotely and any other stuff in the background.
Amazon is a good starting source, at good prices for mem upgrades, especially Kingston devices. Very reliable.
Ok when logic begins to lag th system memory reads 2.07 gigs inactive and free is 2.76 BUT when i try and run anything else at all w/ it free and inactive virtually dissapear also when logic lags it is using about 482 mb real mem finally when logic is lagging there is 0 bytes worth of page outs anything else you want just ask thnx for the help