I have 3 sites which, overnight, have become very slow to respond.
I have contacted my host provider and they are not hitting any CPU, disk or memory usage. The sites seem to be just waiting.
Other non-wordpress sites work fine for me on the same hosting provider & even PHP/MySQL based pages written by myself (separate to wordpress stuff) on the same domain work instantly!
One site I have upgraded to WordPress 3.6, but the other two sites I have not upgraded for a month or two. They suddenly started going slow at 01:30 BST on Tue 6 Aug 2013.
On one of the sites I have two plugins enabled ("Jetpack" & "All-In-One SEO Plugin"). I disabled both and the site gave instant response! I then enabled AIOSEOP and it became slow again, so I disabled AIOSEOP and it became quick again! I then enabled Jetpack and it became slow again, so I disabled Jetpack and it became quick again! I then enabled both and it became slow again.
Is anyone else experiencing this issue??
What is going on??
Thanks in advance! :-)