QOS is a must for me and 5.1 has the same QOs issues i ran into with 5.027. Also smarthost is not working right. I have started threads on both in their respective forums.
POP3 proxy seems to go bockwild! (CPU usage exploding & approx. 100MB more memory usage.) Network usage graphs for my interfaces are missing. Also started threads in their respective forums.
I have also noticed and incease of about 60Mb of ram after the upgrade to 51. Everything is working fine though. I guess that is just a bit more stuff going on. traffic to the LO interface has dropped quite a bit, and the current connections graph is also showing a drop in the number of connections.
5.100 works now after another reboot. But the CPU usage has increased from 0.2 to 1.0! Memory from 200 to 300 MB... Maybe that's the DNS graph, that's working again... [;)]
The higher memory usage might be related to the way the linux kernel handles RAM and swap. Is your swap usage also higher? Or is it maybe lower. Maybe the kernel moves somes more data into memory and less data to swap.
Swapping space is indeed a little bit lower than before... And since 10:00 this morning, the CPU graph is also at the old near-zero level. Monday virus!