I recently bought a realme xt phone 8gb ram varient. I usually get only 4 gb ram free and rest of the ram used by system. So i want to know that it's usual for 8gb ram system to take up to 4 gb ram for system process.
I attached two screenshot taken from the 'developer options -> running services'
ps --ppid $(pgrep zygote64) -o %mem,cmd --sort %mem
and use methods described in given link to make sure they don't run in background. Then setBackground process limit
to zero and checkDon't keep activities
in Developer Options