Too Many "Change User" in connection

[ShiningRush]

Hi，
Our project use MySqlConnector to connect mysql instance of cloud,
then we find that there are too many db operation "Change User" in logs, and it is very cost time.

Some times it will cause timeout in opening connection.

What cause the "Change User" operation and how to avoid it ?
any helps is appreciated.

[bgrainger]

What is your database server and version?

"Change user" (COM_CHANGE_USER) is used when retrieving a connection from the connection pool (to reset it back to a known good state) on MySQL Server v5.6.x and earlier.

If you're using MariaDB, make sure you're using MySqlConnector v0.50.0 or later: #613.

It is strongly recommended that you reset the connection so that server variables are reset, user-defined variables are cleared, temp tables are removed, etc. However, if you must disable this feature for performance reasons, you can set ConnectionReset=false in your connection string.