No no no. Python has a garbage collector that has very strong territory issues – it won’t mess with you creating objects, you don’t mess with it deleting objects. Simply put, it can’t be done, and for a good reason. If, for instance, your need comes from cases of, say, caching algorithms that keep references, … Read more
I found the answer provided by greyfairer is wrong. The JVM runtime does not gather the root set from stack by looking at what bytecodes are used to push data on the stack. The stack frame consists of 4 byte(32bit arch) slots. Each slot could be a reference to a heap object or a primitive … Read more
When you set the reference of any object to null, it becomes available for garbage collection. It still occupies the memory until the garbage collector actually runs. There are no guarantees regarding when GC will run except that it will definitely run and reclaim memory from unreachable objects before an OutOfMemoryException is thrown. You can … Read more
I guess that when GC (Garbage Collector) is working the application stops and resumes when GC finishes I don’t think that is a safe assumption. Are you sure the garbage collector is not working in parallel with your application code? To measure the time spent in collecting garbage you can query the Garbage Collector MXBean. … Read more
This is not an exact answer to the original question, “how to force GC’, yet, I think it will help you to reexamine your issue. After seeing your comment, Putting the GC.Collect(); does seem to help, altought it still does not solve the problem completely – for some reason the program still crashes when about … Read more
-XX:+PrintCommandLineFlags Prints flags passed on command line or configured by the ergonomics (auto-sizing) features. -XX:+PrintFlagsInitial Dumps ALL the default flags and values. -XX:+PrintFlagsFinal Dumps ALL the flags after processing command line and ergonomics. So I think the latter will do for you, just add it to your command line script.
Dispose of an object the instant your are done with it. Disposable objects represent objects holding a valuable resource which the CLR is not intrinsically aware of. Consequently the GC is also unaware of the resources and is unable to make intelligent decisions as to when it should collect a disposable object and hence free … Read more
Python (the language) doesn’t say which form of garbage collection it uses. The main implementation (often known as CPython) acts as you describe. Other versions such as Jython or IronPython use a purely garbage collected system. Yes, there is a benefit of earlier collection with reference counting, but the main reason CPython uses it is … Read more
You can find tutorials on interpreting verbose GC output eg. in: verbosegc output tutorial – Java 7 Heap settings and reading verbose GC output Looking at verbosegc output tutorial – Java 7, you can see YoungGen space analysis: UPDATE 03/27/2014: The “Collection time (secs)” is actually a Timestamp showing the when the GC occurred. The … Read more
I have found out the following: If you change your RAF function into two “ping-pong” like functions, you get alot less garbage. You can’t avoid the first initial “big GC”, but after that you see only minor GCs of about 50kb instead of 700kb-1mb GCs. The code will look like this: <script type=”text/javascript” charset=”utf-8″> window.frameA … Read more