majid hajibaba majid hajibaba - 1 year ago 95
Linux Question

resize physical memory in linux

I wanna to test a program in a system with 512MB memory. But my system has 1GB RAM slot. I don't want use VM or docker. How can I decrease physical system memory in linux by commands such that

free -m
and
top
commands show the 512MB size for memory.

I do it before but forget that and cannot find it again.

Answer Source

The mem kernel parameter will allow you to limit the maximum amount of physical RAM visible to the kernel.

kernel=... mem=512M ...