The users
table contains a row
for each user who has connected to the MySQL server. For each
user name, the table counts the current and total number of
connections. The table size is autosized at server startup. To
set the table size explicitly, set the
performance_schema_users_size
system variable at server startup. To disable user statistics,
set this variable to 0.
The users
table has the following
columns. For a description of how the Performance Schema
maintains rows in this table, including the effect of
TRUNCATE TABLE
, see
Section 29.12.8, “Performance Schema Connection Tables”.
USER
The client user name for the connection. This is
NULL
for an internal thread, or for a user session that failed to authenticate.CURRENT_CONNECTIONS
The current number of connections for the user.
TOTAL_CONNECTIONS
The total number of connections for the user.
MAX_SESSION_CONTROLLED_MEMORY
Reports the maximum amount of controlled memory used by a session belonging to the user.
This column was added in MySQL 8.0.31.
MAX_SESSION_TOTAL_MEMORY
Reports the maximum amount of memory used by a session belonging to the user.
This column was added in MySQL 8.0.31.
The users
table has these
indexes:
Primary key on (
USER
)