I am experiencing some really strange behaviors with a large Drupal 7.8 site (185K nodes) and I'm pulling my hair out at this point.
For some reason, whenever I save stuff from the admin panel (especially views), the site grinds to a halt, and the page I submitted times out completely (usually resulting in a WSOD or partially rendered/unstyled page). The site becomes unusable until I clear the cache, and the CPU starts spinning.
When I clear the cache, everything works fine. Now ... get this:
When I use drush to clear the cache, I have to run it, and quickly stop it then start it again for it work. lol. I get a stream of these error messages if I don't.
$ ../drush/drush cc all
WD filter: Missing text format: 1. [error]
WD filter: Missing text format: 1. [error]
WD filter: Missing text format: 1. [error]
WD filter: Missing text format: 1. [error]
WD filter: Missing text format: 1. [error]
WD filter: Missing text format: 1. [error]
WD filter: Missing text format: 1. [error]
WD filter: Missing text format: 1. [error]
WD filter: Missing text format: 1. [error]
WD filter: Missing text format: 1. [error]
WD filter: Missing text format: 1. [error]
(CTRL-C here to stop it, otherwise it goes for a LONG time then eventually craps out with OOM error).
$ ../drush/drush cc all
'all' cache was cleared in /var/www/html#default [success]If I let the first drush command run, it will eventually run out of memory and stop. I have jacked memory up to 2048M in Apache, just to see, and it still exhausts all the memory. But again, if I quickly stop it, then run it again, it works.
It's like Drupal is churning in the background trying to rebuild the menus or something. Dunno.
Any ideas? I've jacked up memory, jacked up the timeout values to 2 minutes or more, there are no errors in the Apache log, I've disabled Watchdog, thinking that was the culprit, disabled lots of recently installed mods (including XML Sitemap and jQuery Update), but no dice.
Argh!! Thanks in advance for any guidance!