It was because I ran an SQL query, and just at that time the world was supposed to save, and be backed up. Which required much more ram that was available, so I suppose the server started to use virtual ram, which is much slower.
As far as i recall there was a 168 second save once, like 2 years ago.
+Colibri, Administrator of UO Excelsior Shard
Don't know what the purpose of your life is? Well then make something up!
(Old Colibrian proverb)