1. Зависание только при редактировании? Если например просматривать список постов или плагинов в админке зависание происходит?
2. Какая мощность у сервера? Есть ли еще блоги?
3. Какие настройки в WP Super Cache? Сколько живет сам кеш?
4. пробовал отрубить плагины (кроме WP Super Cache)? Зависание происходит?
3. Какие настройки в WP Super Cache? Сколько живет сам кеш?
ON WP Cache and Super Cache enabled
Clear all cache files when a post or page is published. (This may significantly slow down saving of posts.)
Cache rebuild. Serve a supercache file to anonymous users while a new file is being generated. Recommended for very busy websites with lots of comments. Makes "directly cached pages" and "Lockdown mode" obsolete.
Garbage Collection
Last GC was 03:54 minutes ago
Next GC in 06:06 minutes
Expired files are files older than 3600 seconds. They are still used by the plugin and are deleted periodically.
Expiry Time & Garbage Collection
Expire time: 3600 seconds
Lock Down: Disabled
WordPress is not locked down. New comments will refresh Super Cache static files as normal.
Directly Cached Files
Warning! /home/xxx/domain.com/ is writable. Please make it readonly after your page is generated as this is a security risk.
Cache Plugins
Bad Behaviour support is disabled.(Only half-on caching supported, disabled compression and requires Bad Behavior in "/home/xxx/domain.com/wp-content/plugins/bad-behavior/")
No Adverts for Friends plugin is disabled. (requires friendsadverts.php too)