echo 3 > /proc/sys/vm/drop_caches on Mac OSX

Question

Linux's command

echo 3 > /proc/sys/vm/drop_caches

I read this command in URL:

https://unix.stackexchange.com/questions/58553/how-to-clear-memory-cache-in-linux

What command is similar on Mac?

Answer 1

On OSX there is a purge command for that:

sync && sudo purge

sync - force completion of pending disk writes (flush cache)

purge - force disk cache to be purged (flushed and emptied)