Hi, A few days ago I checked the health of my main public server running CentOS 7, a quad-core machine with 16 GB RAM. It had been running non-stop for 65 days, hosting only a handful of services (BIND, NTP, Apache, Postfix, Dovecot) for two domains. I was surprised to see that RAM consumption was relatively high, and apparently, the machine even had to swap at some time. I read up a bit on RAM consumption, and now I wonder if flushing the memory cache regularly is a good idea. https://tecadmin.net/flush-memory-cache-on-linux-server/ Any suggestions? Niki -- Microlinux - Solutions informatiques durables 7, place de l'église - 30730 Montpezat Web : http://www.microlinux.fr Mail : info at microlinux.fr Tél. : 04 66 63 10 32