Confused on a warning message on Logic Pro

Question

I'm working JUST FINE with this song, then suddenly a message pops up along the lines of:
"Warning! Memory is getting short. UNDO history might get smaller"
And since then, everything has slowed down. It takes forever to cut'n'paste, record, move anything, and the curser no longer runs smoothly but jumps when I play the song
So my question is: what "memory" is this referring to and how can I reduce the memory? My UNDO history only shows 30 UNDOs. So how could that possibly slow down anything? Is there a file/folder I can go into and be like "oh yeah, I need to delete all of this clutter" so Logic can run more smooth again?
Thanks for any help!
-jake

Answer 1

It is referring to your song/event memory. Once your songs get big this one pops up-the limit of 'events' is really low IMO. These events are detailed in the memory column in the song information panel. 30 steps is actually pretty big for the amount of events Logic will handle. I have mine set to 5 and 30 backups for songs, in other words I use song backups as undo history and manage the events closely. Removing unused regions from the arrange and audio windows, removing unused sequences, and enabling "empty trash after song save" will help keep these low, some people recommend reorganizing memory, if memory is tight this is not a solution unless there have been several incoming MIDI messages, because Logic keeps those in record. Saving the song will reorganize the memory. So going to the audio window, select unused, delete (not from disk) is what works for many instances to reduce this if you are not in the practice. Consolidating regions helps too if you have a recording which has been cut up and crossfaded 300 times, for example. You can search for more on this in the forum, there is a lot more-seems to show up every week.