Thread:Project:Support desk/Saving Pages takes Over 40 Seconds

My Versions: MediaWiki: 1.16.5, PHP: 5.2.17, MySQL: 5.1.61

Within the last couple of days whenever I edit a page in my MediaWiki site it takes up to 40 seconds to save the page. Previously it only took a few seconds. What is causing this problem? It's just saving pages that's slow, browsing my site by clicking on page links is fast.

I have over 2000 pages in my site but surely that's not causing the problem? I have a dedicated server with no visitors to my site. I know it's not my internet connection that's the problem because I also have another MediaWiki site on another host (shared hosting) and the pages only take a few seconds to save there.