Error while sending QUERY packet I have a includeJS variable set that populates a javascript calendar from an entries loop, with a large amount of entries which needs to be cached. 

Whenever I cache this section I get this error:

Error while sending QUERY packet. PID=11878

What's the problem here?
So turns out this is to do with the size of the packet being sent to the database cache.

My server had a limit of: 
max_allowed_packet = 1M

Doubling this solved my problem.