Yesterday my node used 7GB of RAM, today it uses 12GB and the system's starting to swap itself to death.
Someone said memory usage doesn't matter since it just uses the available RAM.. it uses more than that now.
Any way to diagnose what takes up all the memory before I restart it?

 PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND
    7 root      20   0  0.103t 0.012t 0.011t S   0.7 48.9 217:09.01 monerod