I have occasional episodes of unresponsiveness from my sites/ VPS. I've looked at my VPS container's stats and everything appears normal - RAM usage is about 50%, CPU at 5%, HD space use at 5% and the sites are all low-traffic.
Sometimes, my VEPortal control panel is slow to respond or just times out - just like my sites.
Judging by my resource usage, I don't think the server is being overburdened.
What could the problem be?