“Heap corruption” generally means you wrote into unallocated memory, damaging the data structures used to make the memory allocator work. There may be more problems, but the first one I see is on this line: This will write strlen(n) + 1 bytes to buffer, but buffer is only strlen(n) bytes long (the extra byte is the terminating \0.) Writing that extra byte results … Read more
You can increase to 2GB on a 32 bit system. If you’re on a 64 bit system you can go higher. No need to worry if you’ve chosen incorrectly, if you ask for 5g on a 32 bit system java will complain about an invalid value and quit. As others have posted, use the cmd-line flags – e.g. You … Read more
I am writing my own functions for malloc and free in C for an assignment. I need to take advantage of the C sbrk() wrapper function. From what I understand sbrk() increments the program’s data space by the number of bytes passed as an argument and points to the location of the program break. If … Read more
Run the JVM with -XX:MaxHeapSize=512m (or any big number as you need) (or -Xmx512m for short)
If I remember correctly, there is a strict standard limit for the memory usage in V8 of around 1.7 GB, if you do not increase it manually. In one of our products we followed this solution in our deploy script: There would also be a new space command but as I read here: a-tour-of-v8-garbage-collection the new space … Read more
This message means that for some reason the garbage collector is taking an excessive amount of time (by default 98% of all CPU time of the process) and recovers very little memory in each run (by default 2% of the heap). This effectively means that your program stops doing any progress and is busy running … Read more
Well there are couple of things. Program will start with -Xms value and if the value is lesser it will eventually force GC to occur more frequently Once the program reaches -Xms heap, jvm request OS for additional memory and eventually grabs -Xmx that requires additional time leading to performance issue, you might as well … Read more
Ultimately you always have a finite max of heap to use no matter what platform you are running on. In Windows 32 bit this is around 2GB (not specifically heap but total amount of memory per process). It just happens that Java chooses to make the default smaller (presumably so that the programmer can’t create … Read more
Ultimately you always have a finite max of heap to use no matter what platform you are running on. In Windows 32 bit this is around 2GB (not specifically heap but total amount of memory per process). It just happens that Java chooses to make the default smaller (presumably so that the programmer can’t create … Read more
The stack is the memory set aside as scratch space for a thread of execution. When a function is called, a block is reserved on the top of the stack for local variables and some bookkeeping data. When that function returns, the block becomes unused and can be used the next time a function is … Read more