The other day I had updated to the new FDT 3.0.1 build 1002 and I restarted Eclipse like you usually do when you make software updates. When I restarted Eclipse I got an error saying that I don’t have enough startup memory and to change it in eclipse.ini to be set to -Xmx512m. Of course, my first reaction to this was “English please…” and I couldn’t find the eclipse.ini file on my HD. After some swift Google work I found the solution for OSX.
Go to your Applications/eclipse folder (or wherever you installed Eclipse). Right click on Eclipse.app and go to Show Package Contents. From there, go into the Contents folder and then the MacOS folder. This is where eclipse.ini lives and you can open it up in a text editor. Change the line that reads -Xmx256m to -Xmx512m (just like the cryptic message told us!).
Basically, this allows 512MB to be used in the heap for the JVM which gives you more maximum memory to play with (wow that was nerdy, and no, I didn’t make that up, I don’t talk like that, I just found that on Google ). Hope this helps!