When using ConfigServer Firewall (CSF) you may encounter a large volume of email notifications warning of the virtual memory limit being exceeded. This may often happen in an event_mpm PHP-FPM environment. The tweak below allows you to adjust the value to a higher one.
vi /etc/csf/csf.conf # use " / " and type PT_MEMORY # Capital A to append end of line, or I to insert # Adjust value high enough to stop lfd alerts to stop firing # hit esc :wq