Thank you. I'll be happy to post all those stats. Unfortunately, now that I'm trying to repeat the condition, it isn't happening. But I'm sure it will some time soon, and I'll post back again with this info, once it does.

I do recall, however, that when this was occurring before, the rest of my system was not overloaded, and other apps started and ran without any problem ... including X apps. It was only the Phex app which was sluggish.

Therefore, my sense is that it has to do with threads being starved rather than memory/CPU being overloaded, but that's only a guess.

I'll be back once I have more data.