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Yourkit profiler - option to force GC

Suma Rangaraj
Ranch Hand

Joined: Feb 02, 2005
Posts: 50

Hello all-

I am confused with the option that is given in Yourkit profiler. They have an option to explicitly force GC before taking a snapshot of memory.
Haven't we told time again that a GC cannot be forced? So what does this option mean?

Chris Hurst
Ranch Hand

Joined: Oct 26, 2003
Posts: 433

Its not guaranteed to work but does (Sun VM) unless you explicitly disable it with a command line option (DisableExplicitGC). (You need to check your VM's documentation or just do it and observe the results ;-) )

Attach visual WM and force a GC and you can see the results, we do it all the time for debugging purposes.

Obviously writing a program relying on this behaviour is different, there's no guarantee it'll do anything.

"Eagles may soar but weasels don't get sucked into jet engines" SCJP 1.6, SCWCD 1.4, SCJD 1.5,SCBCD 5
Consider Paul's rocket mass heater.
subject: Yourkit profiler - option to force GC