When I reboot my server, the Virtual Memory, according to the webmin home screen, is 0, but thereafter it only increases. I would expect that the figure would fluxuate in relation to server load, but it doesn't seem to.
As I'm writing this, my real memory is only about 50% utilised, yet my virtual memory isn't 0.
I've tried using a number of command line tools to try and determine what the webmin figure is comprised of but without success. I'm obviously concerned about running out of memory over time.
Can anyone help with explaining how the Virtual Memory figure is determined? (I couldn't find anything in the Wiki about this.) I would like to see if I can tweak some settings to improve the server's performance.
(Ubuntu 14.04 LTS, Apache 2.4.7, MySQL 5.5.38, PHP 5.5.9, Webmin, PureFTP & Quota, phpMyAdmin, postfix, dovecot, amavis, clamav, spamassassin, awstats, fail2ban, Jailkit, bind9, vlogger, webalizer)