Is there any way to diagnose Unmanaged memory leak ? I am using .NET 5.0 Console App with NETCode (barcode) library. The program it self is simple it calls barcode library & creates a base64string from Image 5000 times, I am using ‘using blocks’ therefore disposing is also being handled. On wi…
Tag: memory-leaks
What is using so much memory on an idle linux server? Comparing output of “htop” and “ps aux”
I am trying to understand and compare the output I see from htop (sorted by mem%) and “ps aux –sort=-%mem | grep query.jar” and determine why 24.2G out of 32.3G is in use on an idle server. The ps command shows a single parent (not child process I assume): Whereas htop shows PID 6790 as well…
Which Valgrind tool and option to use for investigation of RAM allocation for each function?
I have never used Valgrind, but I think this tool can help me with my question. I would be grateful for any help. In my R code, I use the MixedModels Julia package. I integrate Julia in R using the JuliaCall package. I work with very large datasets (~1 GB, ~4×10^6 observations) and at the modeling step (…
How do I find a system memory leak in linux?
I’ve got a monolithic piece of software, a game on a basic linux kernel, that seems to leak memory in swap space. The memory usage of the process itself is reported as constant over a day or so but the free memory on the system is consistently decreasing until there is no more physical ram space. There …
valgrind Address 0x421688c is 0 bytes after a block of size 4 alloc’d for linked list having integer data
Although there were multiple threads related to valgrind Address 0x421688c is 0 bytes after a block of size 4 alloc’d kind of questions, but all were expressed with either strlen, or ” related issues and I understand them. I am having with linked list insertion dealing with integers. I did inserti…
‘top’ shows Java program using more memory than Java profiler shows
What are the possible causes for when the Linux top command shows a Java process is using 14GBs of memory while Java profiling shows only 2GBs being used? Answer That means that your JVM / Java application is using off-heap memory. Lots of it. It could be memory-mapped files. It could be native libraries: unl…
Socket Server Memory usage goes up, becomes unresponsive
I have the following socket server code for Linux using Pthreads. If I start stress testing this with: The memory increases to about 270MB then the server becomes unresponsive: On ARMv7 architecture this takes a shorter time. If I stop the requests with the for loop, the memory does not get freed up, meaning …
Mem alloced via mmap without munmap will cause leak after process exits or terminals
there is the code about alloc mem via mmap void *ret = mmap(NULL, 4 * 1024, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANON, -1, 0); when process exits normally, the memory will be return to os ? Answer According to the man and under unmap: The region is also automatically unmapped when the process is terminat…