Group:
Connection History
Name:
Percentage of refused connections
Description:
High number of Connection attempts failed.
If this number is high then it seems that your clients don't have privileges to connect or they are using an incorrect password to connect. A high number might also indicate that someone is trying to hack your server!
Formula:
Aborted_connects / Connections
Mail Alert Enabled?:
Yes
Advice:
1. Try to isolate users/applications that are using an incorrect password or trying to connect from unauthorized hosts.
2. A client will be disallowed to connect if it takes more than connect_timeout seconds to connect.
3. Set the value of log_warnings system variable to 2. This will force the MySQL server to log further information about the error