Dual processor server is running smoothly and coping with all the traffic. The problem is probably local to you. If you know how do a Traceroute from your ISP to pprune.org and you will see where the bottleneck is. It isn't the PPRuNe server and most likely one of the routers from your ISP to the PPRuNe server.
Now off to the appropriate forum with this.
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Capt PPRuNe
aka Danny Fyne
The Professional Pilots RUmour NEtwork