If you use --socket, you will be comparing Apples (Drizzle over TCP/IP) with Oranges (MySQL over unix domain sockets).
In addition, --socket=/tmp/mysqld.sock is quite likely to be the socket that the MySQL server used in d-a data collection is on, which will make running d-a a bit, well, unpredictable.
I highly recommend instead using MySQL over TCP/IP, which would mean specifying the MySQL --host and --port properly.
If you use --socket, you will be comparing Apples (Drizzle over TCP/IP) with Oranges (MySQL over unix domain sockets).
In addition, --socket= /tmp/mysqld. sock is quite likely to be the socket that the MySQL server used in d-a data collection is on, which will make running d-a a bit, well, unpredictable.
I highly recommend instead using MySQL over TCP/IP, which would mean specifying the MySQL --host and --port properly.