I should first say that I'm pretty familiar with configuring Eclipses memory settings. I'm currently using a variant of one of the posted configurations:
... --launcher.XXMaxPermSize 256m -vmargs -Xms40m -Xmx512m -Xss2m -Djava.net.preferIPv4Stack=true -Dcom.sun.management.jmxremote
And according to JConsole and the internal heap monitor, Eclipse never gets close to running out of heap.
What it DOES do is crash constantly with OOMEs, like every 30-50 minutes. Sometimes it tells me there was an OOME, other times it just closes silently. Strangely, the OTHER eclipse instance that is running all the time (the J2EE version) has never crashed once, even with a lot more source files.
There's been once or twice where it's been a zombie process after the crash and I got to see its memory footprint - around 1.5gigs, well above what the heap monitor said it was using. So, what's the deal? Something leaking? I do notice that the number of active threads appears to constantly go up.
Anyone had this problem and fixed it?
According to this site, the proper memory settings for Eclipse/Flex Builder is:
-Xms256m
-Xmx512m
Those are the mem settings I use for eclipse and it seems to work fine. Hope that helps.