hello all;
I am running a containerized application which is consist of micro-services , what I'm facing that there are a lot of those micro-services crashed after 5 hours of working and when I traced the logs the error was leak in memory, I checked the memory usage by free command then I noticed a big mount of memory is reserved as buffered/cached ,i tried to clear them by the following command but with no benefit "cached memory stayed as it was" :
sync;/sbin/sysctl vm.drop_caches=1
sync;/sbin/sysctl vm.drop_caches=2
sync;/sbin/sysctl vm.drop_caches=3
sync

please guide me how to force the kernel to free the cached memory.

High cache usage is normal, and usually beneficial - it may also indicate a memory problem, but even if so is merely a symptom, not the actual problem. Concentrate on finding and fixing the leak rather than the symptom that is telling you that you may have a real problem.
If you haven't already, go read linuxatemyram.

Post your /proc/meminfo for a better indication of memory allocation. Let's see the OOM messages as well.

1 members found this post helpful.

I had to learn the Linux way of doing this years ago and despite telling others in my organization about it they still immediately send me a screen shot of "free" outpout to "prove" the memory is all in use. I like your link - maybe I'll remember it to send to them the next time.