In my case, high memory/CPU utilization in polkitd and CPU utilization in dbus was the result of repeated calls to nm-tool that I was making in conky to determine my wireless essid. In previous versions, this was not a problem, and there is clearly a memory leak in polkitd associated with this. However, I can work around the problem by dropping the calls to nm-tool from my conky config.
In my case, high memory/CPU utilization in polkitd and CPU utilization in dbus was the result of repeated calls to nm-tool that I was making in conky to determine my wireless essid. In previous versions, this was not a problem, and there is clearly a memory leak in polkitd associated with this. However, I can work around the problem by dropping the calls to nm-tool from my conky config.