I've got a big problem with my WordPress site: it's started taking more than 30 seconds to respond to visits to the homepage. When I checked with the hosting company, they said that WordPress is submitting a huge number of queries to the MySQL database.
They sent me the query file; it's 2.3 megabytes, and contains nearly 4,000 SELECTs alone.
They suggested that it's probably a plug-in that's at fault. Can anyone please advise me how to diagnose the problem so I can figure out what's going on?
The plug-ins currently installed are:
AVH Extended Categories WIdgets
Google Analytics for WordPress
Mingle Forum (one of the most recently added)
Online Backup for WordPress
Wordpress Backup to Dropbox
WUP Super Cache
WUP SUrvey & Quiz Tool (one of the most recently added)
Wufoo Shortcode Plugin
BTW, some of these were installed by my developer. If you know that any of them are redundant, please let me know so we can deactivate or uninstall them!
Thank you for helping.