Error code: 1153 – Got a packet bigger than ‘max_allowed_packet’ bytes
So of course I looked it up.
It turns out that MySQL views a single SQL statement as a communication packet, with a built in limit of 1GB. However, servers usually have a set maximum packet size they are allowed to accept and clients a maximum packet size they are allowed to send, both of which is controlled by a variable called max_allowed_packet. If it receives a packet bigger than this limit, the server will spit back a 1153 error and close the connection.
If you wish to check what your current maximum packet size is, run the following query:
SHOW VARIABLES LIKE ‘max_allowed_packet’
Of course, you would also want to increase these limits at some point in time, something which is easily achieved like so:
To increase a client program’s default, run: shell> mysql –max_allowed_packet=32MB.
To increase a server’s default, run: shell> mysqld –max_allowed_packet=16M.
Note that this is fairly safe to increase this value as memory is allocated only when needed. So now you know! :)