On Tue, 19 Jan 2016 10:12:12 AM Piers Rowan via luv-main wrote:
The server is a VM on a host server that also provides http / mysql services. The host server runs cron jobs to poll the email server (importing data from mail boxes into the CRM) so - to clutch at straws - I am not sure if the host and guest are competing for the disk IO at the same time with these calls. Contrary to that is that the host server does not experience any slow downs.
Some ideas that I've not seen mentioned before yet: 1) perf top - to see where the system is spending time as a whole (and if you need to drill down on a process you can do perf top -p $PID). 2) latencytop - as long as your kernel has CONFIG_LATENCYTOP 3) iotop - if your version is new enough then the -o option will hide idle processes, otherwise just press 'o' when you get the main display. Best of luck! Chris -- Chris Samuel : http://www.csamuel.org/ : Melbourne, VIC