My webserver startup times have become longer that 1 minute. Much of the time is spent in ad_parameter_cache_all loading about 22,000 parameters.
I looked at ad_parameter_cache and it now caches parameters that were not cached before so I commented out ad_parameter_cache_all and the server starts much faster now.
Everything seems to work fine. I guess I'm wondering is there a need for ad_parameter_cache_all?