Mysql max_allowed_packet error

You are probably here because you tried to import a big database (several GB) and got the following error:

ERROR 1153 (08S01) at line 2533: Got a packet bigger than 'max_allowed_packet' bytes

If you have access to your mysql server and SUPER privileges things are easy, you just need to log in as superuser to mysql and type this:

mysql>set global max_allowed_packet=64*1024*1024;

and then import the database normally, just adding “–max_allowed_packet=64M” to the parameter list. Example:

$mysql --max_allowed_packet=64M database < database.sql

Everything is so easy. But if you are using Amazon RDS you are out of luck. You setup a user when you create the instance but of course it doesn’t have the SUPER privilege so if you try to execute the above command it will fail. Not even “grant super on *.* to myuberuser” will help you, no no. So after some googling and reading a lot of crap I found this blog which had the same error as mine. Yuppy! Thanks Henry!

The solution is to use DB Parameter Groups. Grab your mouse and start copy pasting fast.

Download Amazon RDS Command Line Toolkit
The latest version can be found here

cd RDSCli-1.3.003 (this will surely change so make sure you cd to the right directory)
export AWS_RDS_HOME=`pwd`
export JAVA_HOME=/usr/lib/jvm/java-1.6.0-openjdk (this may vary depending on your java location and may not have to set it)
cp credential-file-path.template credential-file
vi credential-file (set your aws credentials there, use whatever text editor you like)
export AWS_CREDENTIAL_FILE=${AWS_RDS_HOME}/credential-file
cd bin
./rds --help

If everything went well you should get some output. On Henry blog he says he suggests that you create a parameter group. Well the reality is you have to create it since Amazon won’t let you modify parameters inside the default group.

./rds-create-db-parameter-group mygroup -f MySQL5.1 -d "My group"
./rds-modify-db-parameter-group mygroup --parameters "name=max_allowed_packet,value=67108864,method=immediate"
./rds-modify-db-instance YOURINSTANCENAMEHERE --db-parameter-group-name mygroup

Go to Amazon management console and check that the new parameter group is created and applied to your instance. You can begin now the import as you would do normally just add “–max_allowed_packet=64M” to the list of your options.

Hope it helps!

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