we run a debian server with 64Gb of RAM to run large python simulations.
The problem we face is that a large amount of this memory is getting used and we don't know why or how to correct that.
It appears it is not a cache/buffer thing:
free -m
total used free shared buffers cached
Mem: 64454 56243 8211 20 6 113
-/+ buffers/cache: 56122 8332
Swap: 21051 5834 15217
When running smem, it shows us that after a few days, up to 37 Gb are allocated for the kernel dynamic memory.
Area Used Cache Noncache
firmware/hardware 0 0 0
kernel image 0 0 0
kernel dynamic memory 36.8G 431.0M 36.4G
userspace memory 4.5G 149.7M 4.4G
free memory 21.6G 21.6G 0
----------------------------------------------------------
62.9G 22.2G 40.8G
We rebooted the server yesterday, and while a the start it shows a kernel dynamic memory of 1.5 Gb, it slowly increases.
24 hours later, it has already reached 17Gb
Area Used Cache Noncache
firmware/hardware 0 0 0
kernel image 0 0 0
kernel dynamic memory 17.1G 269.3M 16.8G
userspace memory 36.4G 73.0M 36.3G
free memory 9.4G 9.4G 0
----------------------------------------------------------
62.9G 9.8G 53.2G
Any idea how to investigate further and if this is really a memory leak, what should we do? (kernel is 3.16)
Thanks in advance
