Each account that connects to the server is stored as a row in the accounts table, along with current and total connections.
The table size is determined at startup by the value of the performance_schema_accounts_size system variable. If this is set to 0, account statistics will be disabled.
USER
The connection's client user name for the connection, or NULL if an internal thread.
HOST
The connection client's host name, or NULL if an internal thread.
CURRENT_CONNECTIONS
Current connections for the account.
TOTAL_CONNECTIONS
Total connections for the account.
The USER
and HOST
values shown here are the username and host used for user connections, not the patterns used to check permissions.
SELECT * FROM performance_schema.accounts;
+------------------+-----------+---------------------+-------------------+
| USER | HOST | CURRENT_CONNECTIONS | TOTAL_CONNECTIONS |
+------------------+-----------+---------------------+-------------------+
| root | localhost | 1 | 2 |
| NULL | NULL | 20 | 23 |
| debian-sys-maint | localhost | 0 | 35 |
+------------------+-----------+---------------------+-------------------+
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