XF 1.5 Server error Lock wait timeout exceeded


What is this server error telling me? I have 4 pages of this.

Mysqli statement execute error : Lock wait timeout exceeded; try restarting transaction Yesterday at 8:41 AM - library/Zend/Db/Statement/Mysqli.php:214


XenForo developer
Staff member
Did they generally happen at the same time?

It basically just means that database actions timed out because they were waiting for something to finish and it took too long. If it's happening consistently and within a certain time period, there's likely something else on the server (such as a backup process) holding a lock. If it happened once or as a burst within a short time frame, that probably indicates the server was overloaded at that period of time.