The WordPress person who was key in my particular solution – see above – is Esmi – Thank you, Esmi.
Our problems are quite similar in that they are load based. To understand that loading takes careful study of log files if one is to customize WordPress in that way. Again, I minimized that possibility by using multiple themes based on one base. I never mentioned that I’m new to WordPress but not to technology, been in that since before desktop computers, so I’m used to the world of command lines and log files. No programmer though, again, that’s why I chose WordPress. If your background, or chosen method doesn’t involve the debugging side of WordPress, I really suggest staying within WP’s boundaries. Theme switching is in a gray area. It’s been a fight here also.
To move toward a solution to your particular issue reedbird8, I suggest a systematic approach. There are two ways to do that: Start fresh and add every module you have one, by one, piece by piece, until you get a crash – Gotta have your logs here. The other is the reverse of this – starting with what you have running without making it crash, and de-install everything until it works, then rebuild from there. I don’t know what your particular installation is, but if I were assigned to a field tech job to diagnose your issue, that’s the method I’d use, without knowing any particulars. That’s the tech world I’m from. I’d also look at the overall strategy and look at alternative ways to get the same look and feel you get from theme switching. Load analysis is a must when you have a ton of pages. The available, lo cost services offer what the average customer uses most. We’re way outside of that. I didn’t want my site to be pounding the server so hard that timeouts would be generate by either load or network traffic. I’m working out and extension to a present script – php – right now instead of creating a new and separate one. Both methods “work” but one uses a separate set of queries. I use the one that is both faster and gets the job done.
Hope that’s of some help.
“Small Change (Got Rained on with His Own .38)”–Tom Waits