MySQL¶

CREATE USER 'datakit'@'localhost' IDENTIFIED BY '<UNIQUEPASSWORD>';

-- MySQL 8.0+ create the datakit user with the caching_sha2_password method
CREATE USER 'datakit'@'localhost' IDENTIFIED WITH caching_sha2_password by '<UNIQUEPASSWORD>';

GRANT PROCESS ON *.* TO 'datakit'@'localhost';
GRANT SELECT ON *.* TO 'datakit'@'localhost';
show databases like 'performance_schema';
GRANT SELECT ON performance_schema.* TO 'datakit'@'localhost';
GRANT SELECT ON mysql.user TO 'datakit'@'localhost';
GRANT replication client on *.*  to 'datakit'@'localhost';

-- ON: turn on, OFF: turn off
SHOW VARIABLES LIKE 'log_bin';

[[inputs.mysql]]

# Turn on database performance metric collection
dbm = true

...

# Monitor metric configuration
[inputs.mysql.dbm_metric]
  enabled = true

# Monitor sampling configuration
[inputs.mysql.dbm_sample]
  enabled = true

# Waiting for event collection
[inputs.mysql.dbm_activity]
  enabled = true   
...

[mysqld]
performance_schema = on
max_digest_length = 4096
performance_schema_max_digest_length = 4096
performance_schema_max_sql_text_length = 4096
performance-schema-consumer-events-statements-current = on
performance-schema-consumer-events-waits-current = on
performance-schema-consumer-events-statements-history-long = on
performance-schema-consumer-events-statements-history = on

-- MySQL 5.6 & 5.7
GRANT REPLICATION CLIENT ON *.* TO datakit@'%' WITH MAX_USER_CONNECTIONS 5;
GRANT PROCESS ON *.* TO datakit@'%';

-- MySQL >= 8.0
ALTER USER datakit@'%' WITH MAX_USER_CONNECTIONS 5;
GRANT REPLICATION CLIENT ON *.* TO datakit@'%';
GRANT PROCESS ON *.* TO datakit@'%';

CREATE SCHEMA IF NOT EXISTS datakit;
GRANT EXECUTE ON datakit.* to datakit@'%';
GRANT CREATE TEMPORARY TABLES ON datakit.* TO datakit@'%';

DELIMITER $$
CREATE PROCEDURE datakit.explain_statement(IN query TEXT)
    SQL SECURITY DEFINER
BEGIN
    SET @explain := CONCAT('EXPLAIN FORMAT=json ', query);
    PREPARE stmt FROM @explain;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
END $$
DELIMITER ;

DELIMITER $$
CREATE PROCEDURE <db_name>.explain_statement(IN query TEXT)
    SQL SECURITY DEFINER
BEGIN
    SET @explain := CONCAT('EXPLAIN FORMAT=json ', query);
    PREPARE stmt FROM @explain;
    EXECUTE stmt;
    DEALLOCATE PREPARE stmt;
END $$
DELIMITER ;
GRANT EXECUTE ON PROCEDURE <db_name>.explain_statement TO datakit@'%';

DELIMITER $$
CREATE PROCEDURE datakit.enable_events_statements_consumers()
    SQL SECURITY DEFINER
BEGIN
    UPDATE performance_schema.setup_consumers SET enabled='YES' WHERE name LIKE 'events_statements_%';
    UPDATE performance_schema.setup_consumers SET enabled='YES' WHERE name = 'events_waits_current';
END $$
DELIMITER ;

GRANT EXECUTE ON PROCEDURE datakit.enable_events_statements_consumers TO datakit@'%';

UPDATE performance_schema.setup_consumers SET enabled='YES' WHERE name LIKE 'events_statements_%';
UPDATE performance_schema.setup_consumers SET enabled='YES' WHERE name = 'events_waits_current';

 [inputs.mysql.tags]
  # some_tag = "some_value"
  # more_tag = "some_other_value"
  # ...

SET GLOBAL slow_query_log = 'ON';

-- Queries that do not use indexes are also considered a possible slow query
set global log_queries_not_using_indexes = 'ON';

[inputs.mysql.log]
    # Fill in the absolute path
    files = ["/var/log/mysql/*.log"]

2017-12-29T12:33:33.095243Z         2 Query     SELECT TABLE_SCHEMA, TABLE_NAME FROM INFORMATION_SCHEMA.TABLES WHERE CREATE_OPTIONS LIKE '%partitioned%';

# Time: 2019-11-27T10:43:13.460744Z
# User@Host: root[root] @ localhost [1.2.3.4]  Id:    35
# Query_time: 0.214922  Lock_time: 0.000184 Rows_sent: 248832  Rows_examined: 72
# Thread_id: 55   Killed: 0  Errno: 0
# Bytes_sent: 123456   Bytes_received: 0
SET timestamp=1574851393;
SELECT * FROM fruit f1, fruit f2, fruit f3, fruit f4, fruit f5

show variables like "performance_schema";

+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| performance_schema | ON    |
+--------------------+-------+