by Bente Olsen.
Thanks Ken, I'll try that.
Besides, BTW, rsync and course backup also use a lot of memory, rsync it all, course backup almost all. Afterwards it takes quite a while (hours) before the memory usage is down to normal.
I have seen somewhere else that rsync do use what's available of memory, and you should be able to clear cache with
sh -c': sh -c "sync; echo 3 > /proc/sys/vm/drop_caches"
But I do not have permissions for that on the web server. The server support can not help me.