Information Schema CLIENT_STATISTICS Table
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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:
| Field | Type | Notes |
|---|---|---|
CLIENT | VARCHAR(64) | The IP address or hostname the connection originated from. |
TOTAL_CONNECTIONS | BIGINT(21) | The number of connections created for this client. |
CONCURRENT_CONNECTIONS | BIGINT(21) | The number of concurrent connections for this client. |
CONNECTED_TIME | BIGINT(21) | The cumulative number of seconds elapsed while there were connections from this client. |
BUSY_TIME | DOUBLE | The cumulative number of seconds there was activity on connections from this client. |
CPU_TIME | DOUBLE | The 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_RECEIVED | BIGINT(21) | The number of bytes received from this client's connections. |
BYTES_SENT | BIGINT(21) | The number of bytes sent to this client's connections. |
BINLOG_BYTES_WRITTEN | BIGINT(21) | The number of bytes written to the binary log from this client's connections. |
ROWS_READ | BIGINT(21) | The number of rows read by this client's connections. |
ROWS_SENT | BIGINT(21) | The number of rows sent by this client's connections. |
ROWS_DELETED | BIGINT(21) | The number of rows deleted by this client's connections. |
ROWS_INSERTED | BIGINT(21) | The number of rows inserted by this client's connections. |
ROWS_UPDATED | BIGINT(21) | The number of rows updated by this client's connections. |
KEY_READ_HITS | BIGINT(21) | From MariaDB 11.5 |
KEY_READ_MISSES | BIGINT(21) | From MariaDB 11.5 |
SELECT_COMMANDS | BIGINT(21) | The number of SELECT commands executed from this client's connections. |
UPDATE_COMMANDS | BIGINT(21) | The number of UPDATE commands executed from this client's connections. |
OTHER_COMMANDS | BIGINT(21) | The number of other commands executed from this client's connections. |
COMMIT_TRANSACTIONS | BIGINT(21) | The number of COMMIT commands issued by this client's connections. |
ROLLBACK_TRANSACTIONS | BIGINT(21) | The number of ROLLBACK commands issued by this client's connections. |
DENIED_CONNECTIONS | BIGINT(21) | The number of connections denied to this client. |
LOST_CONNECTIONS | BIGINT(21) | The number of this client's connections that were terminated uncleanly. |
ACCESS_DENIED | BIGINT(21) | The number of times this client's connections issued commands that were denied. |
EMPTY_QUERIES | BIGINT(21) | The number of times this client's connections sent queries that returned no results to the server. |
TOTAL_SSL_CONNECTIONS | BIGINT(21) | The number of TLS connections created for this client. (>= MariaDB 10.1.1) |
MAX_STATEMENT_TIME_EXCEEDED | BIGINT(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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