I'm having a problem with the WordPress sites hosted on our server. Each page load is stalled for exactly one minute before serving content, making the site extremely painful to navigate.
I've already checked that the CPU levels are under 5% utilization and the free RAM is over 1.5 GB on both the web server and the database server. Other sites, including other PHP sites as well as static HTML, running on the same webserver and connecting to the same database server are responding very quickly. I tried restarting both the apache and mysqld processes to make sure they were not hung up on something.
It seems like some part of the WP script is timing out after exactly 60 seconds, but I can't figure out what it would be. Resources (images, css, js, etc) are loading very quickly. Any thoughts?