Currently Being ModeratedFeb 10, 2013 12:14 AM (in response to gaggy)
Logic 9.0 is generally as buggy as *****. You should update, and you will need to if you want to run Logic in 64bit mode to access the extra RAM.
Any application running in 32bit mode can only access approx 4G of memory, Logic gets unstable when it's using in the order of 3G.
Running in 64bit mode effectively removes this restriction, but you will need to check that any 3rd party plugs you use also run in 64bit mode where possible, otherwise you will have to deal with Logic's 32bit bridge (which does have it's "quirks").
Currently Being ModeratedFeb 10, 2013 4:15 AM (in response to gaggy)
And you could delete your undo history more often. Large edits in a long undo list take up a lot of ram.
Logic's 32 bit bridge, for the most part, works fine for me. I don't like it because of its "quirks", but they are only a minor inconvenience compared to the tremendous advantage of working in 64 bit, even though half of your plugs are only 32 bit. 64 bit is particularly useful if you are using large instrument libraries, like EWQL orchestras.