cheers,
tumbleweed KDE user over here stalked by a little problem
when booting up RAM usage is about 600mb.
After starting firefox RAM goes up.
When closing firefox the RAM usage stays higher than at the start up, about 750mb.
how come?
shouldn´t the usage go down to its initial value(600mb)?
Network Buffers and routing tables don’t shrink they grow. Firefox called for them, the Kernel sees the need and allocates them. Since others might need them - they don’t go away for a while sometimes not til the next boot.
Cron jobs also run while Firefox is up - PackKit also uses network resources (the thing that says updates are available) is call by systemd timers.
Run top and iotop to see what happens when Firefox starts.
Probably pages are kept in memory. When you start Firefox again, it will startup faster, because the code pages are still there (the startup time difference will of course depend on how fast your mass storage is, e.g. SSD vs. revolving disk).
And that is of course not restricted to Firefox.
I assume you mean “next shutdown”. I doubt they will be in use by a not running system. lol!
Hi
It also caches the info in memory for later use, what you need to do for example it run free before and after;
free -h
total used free shared buff/cache available
Mem: 62Gi 3.5Gi 48Gi 88Mi 10Gi 58Gi
Swap: 3.6Gi 0B 3.6Gi
echo 3 > /proc/sys/vm/drop_caches
free -h
total used free shared buff/cache available
Mem: 62Gi 2.8Gi 58Gi 88Mi 1.0Gi 59Gi
Swap: 3.6Gi 0B 3.6Gi