Accidentally set SQL Server 2008R2 Max memory to 0

Do SQL Server memory Max memory set the idea, the maximum value of 0, how can not connect to the database, which is really urgent ah, finally saw a text command to save back, other very simple urgency is not come up.
1. Pause all SQL Server services.

2. With Sqlservr.exe-m "sqlcmd", the Sqlsever can only perform sqlcmd commands.

3. Perform the sqlcmd command.

4. Perform all of the following commands in sequence.

sp_configure ' show advanced options ', 1;
Go
RECONFIGURE;
Go sp_configure ' max server memory ', 2147483647;
Go
RECONFIGURE;
Go

Finally restart SQL Server finally normal, today is lantern this is a test of their own experience.

Accidentally set SQL Server 2008R2 Max memory to 0