Information Schema CLIENT_STATISTICS Table

MariaDB 5.2.0

The CLIENT_STATISTICS table was introduced in MariaDB 5.2.0 as part of the User Statistics feature.

MariaDB starting with 10.1.1

The TOTAL_SSL_CONNECTIONS and MAX_STATEMENT_TIME_EXCEEDED columns were added in MariaDB 10.1.1

The Information Schema CLIENT_STATISTICS table holds statistics about client connections. This is part of the User Statistics feature, which is not enabled by default.

It contains the following columns:

FieldTypeNotes
CLIENTVARCHAR(64)The IP address or hostname the connection originated from.
TOTAL_CONNECTIONSINT(21)The number of connections created for this client.
CONCURRENT_CONNECTIONSINT(21)The number of concurrent connections for this client.
CONNECTED_TIMEINT(21)The cumulative number of seconds elapsed while there were connections from this client.
BUSY_TIMEDOUBLEThe cumulative number of seconds there was activity on connections from this client.
CPU_TIMEDOUBLEThe cumulative CPU time elapsed while servicing this client's connections. Note that this number may be wrong on SMP system if there was a CPU migration for the thread during the execution of the query.
BYTES_RECEIVEDINT(21)The number of bytes received from this client's connections.
BYTES_SENTINT(21)The number of bytes sent to this client's connections.
BINLOG_BYTES_WRITTENINT(21)The number of bytes written to the binary log from this client's connections.
ROWS_READINT(21)The number of rows read by this client's connections.
ROWS_SENTINT(21)The number of rows sent by this client's connections.
ROWS_DELETEDINT(21)The number of rows deleted by this client's connections.
ROWS_INSERTEDINT(21)The number of rows inserted by this client's connections.
ROWS_UPDATEDINT(21)The number of rows updated by this client's connections.
SELECT_COMMANDSINT(21)The number of SELECT commands executed from this client's connections.
UPDATE_COMMANDSINT(21)The number of UPDATE commands executed from this client's connections.
OTHER_COMMANDSINT(21)The number of other commands executed from this client's connections.
COMMIT_TRANSACTIONSINT(21)The number of COMMIT commands issued by this client's connections.
ROLLBACK_TRANSACTIONSINT(21)The number of ROLLBACK commands issued by this client's connections.
DENIED_CONNECTIONSINT(21)The number of connections denied to this client.
LOST_CONNECTIONSINT(21)The number of this client's connections that were terminated uncleanly.
ACCESS_DENIEDINT(21)The number of times this client's connections issued commands that were denied.
EMPTY_QUERIESINT(21)The number of times this client's connections sent queries that returned no results to the server.
TOTAL_SSL_CONNECTIONSINT(21)The number of TLS connections created for this client. (>= MariaDB 10.1.1)
MAX_STATEMENT_TIME_EXCEEDEDINT(21)The number of times a statement was aborted, because it was executed longer than its MAX_STATEMENT_TIME threshold. (>= MariaDB 10.1.1)

Example

SELECT * FROM information_schema.CLIENT_STATISTICS\G
*************************** 1. row ***************************
                CLIENT: localhost
     TOTAL_CONNECTIONS: 3
CONCURRENT_CONNECTIONS: 0
        CONNECTED_TIME: 4883
             BUSY_TIME: 0.009722
              CPU_TIME: 0.0102131
        BYTES_RECEIVED: 841
            BYTES_SENT: 13897
  BINLOG_BYTES_WRITTEN: 0
             ROWS_READ: 0
             ROWS_SENT: 214
          ROWS_DELETED: 0
         ROWS_INSERTED: 207
          ROWS_UPDATED: 0
       SELECT_COMMANDS: 10
       UPDATE_COMMANDS: 0
        OTHER_COMMANDS: 13
   COMMIT_TRANSACTIONS: 0
 ROLLBACK_TRANSACTIONS: 0
    DENIED_CONNECTIONS: 0
      LOST_CONNECTIONS: 0
         ACCESS_DENIED: 0
         EMPTY_QUERIES: 1

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