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Java Forum / General / March 2007prevent a garpage Collection
hi can we prevent a garpage Collection in java if so how is it possible > hi > can we prevent a garpage Collection in java > if so how is it possible No. Hi, >>hi >>can we prevent a garpage Collection in java >>if so how is it possible > > No. Or... Yes - simply keep a reference to the Object you want to prevent from being collected. :-) Or... Please describe your question in detail. Ciao, Ingo > Hi, > [quoted text clipped - 8 lines] > > Or... Please describe your question in detail. Go not to the Internet Elves for advice, for they will say both "WTF, dude?!?" and "RTFM!!" ;-) > > Hi, > [quoted text clipped - 12 lines] > Go not to the Internet Elves for advice, for they will say both "WTF, > dude?!?" and "RTFM!!" ;-) hey not in program while running the program is there any option to prvent the garpage collection daemon it means i ma talking abt garpage collectioon daemon Hi, >>>>No. > [quoted text clipped - 3 lines] > collection daemon > it means i ma talking abt garpage collectioon daemon Then, the above answer is correct. The only possibility to influence the GC is to use the commandline options and to call System.gc() (which does the opposite of "preventing" gc). Ciao, Ingo > Hi, > [quoted text clipped - 12 lines] > Ciao, > Ingo Of course, System.gc() only *suggests* to the virtual machine that you want the garbage collector to run at that point -- the vm doesn't actually have to do it then, or reclaim all unreferenced memory. > Hi, > [quoted text clipped - 9 lines] > GC is to use the commandline options and to call System.gc() (which does > the opposite of "preventing" gc). Perhaps you could run the VM in debugging mode, and then find the GC thread, and pause it indefinitely (this is assuming your VM implementation actually dedicates an entire thread to the GC, and promises not to do any GC-ing in other threads). - Oliver > can we prevent a garpage Collection in java > if so how is it possible Why? On Mar 22, 6:10 am, Esmond Pitt <esmond.p...@nospam.bigpond.com> wrote: > > can we prevent a garpage Collection in java > > if so how is it possible > > Why? Usually the GC daemon will only "take over" if the heap has become full. Possibly this can be made to happen much less often by properly disposing of objects as you go along. If you are creating really large objects in the heap and not disposing them properly, the GC will have to run. You might need to profile your application to see if that is happening. > Usually the GC daemon will only "take over" if the heap has become > full. Possibly this can be made to happen much less often by properly > disposing of objects as you go along. If you are creating really > large objects in the heap and not disposing them properly, the GC will > have to run. Meaningless advice. Disposing of objects "properly" or not has no effect on how often GC runs, only on how much it reclaims when it does. In fact the programmer cannot "dispose" of objects in any case, only dereference them. It is the GC that disposes of the objects. The GC runs when heap gets cramped, which happens from the /creation/ of objects. The only way to try to prevent GC from running is not to create objects, which of course, is silly. -- Lew Free MagazinesGet these publications absolutely FREE for up to 12 months. There are no hidden fees and no obligation. Simply choose a title, complete the application form and submit it. Read more ...
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