# MySQL Input plugin This plugin gathers the statistic data from MySQL server * Global statuses * Global variables * Slave statuses * Binlog size * Process list * Info schema auto increment columns * Table I/O waits * Index I/O waits * Perf Schema table lock waits * Perf Schema event waits * Perf Schema events statements * File events statistics * Table schema statistics ## Configuration ``` # Read metrics from one or many mysql servers [[inputs.mysql]] ## specify servers via a url matching: ## [username[:password]@][protocol[(address)]]/[?tls=[true|false|skip-verify]] ## see https://github.com/go-sql-driver/mysql#dsn-data-source-name ## e.g. ## servers = ["user:passwd@tcp(127.0.0.1:3306)/?tls=false"] ## servers = ["user@tcp(127.0.0.1:3306)/?tls=false"] # ## If no servers are specified, then localhost is used as the host. servers = ["tcp(127.0.0.1:3306)/"] ## the limits for metrics form perf_events_statements perf_events_statements_digest_text_limit = 120 perf_events_statements_limit = 250 perf_events_statements_time_limit = 86400 # ## if the list is empty, then metrics are gathered from all database tables table_schema_databases = [] # ## gather metrics from INFORMATION_SCHEMA.TABLES for databases provided above list gather_table_schema = false # ## gather thread state counts from INFORMATION_SCHEMA.PROCESSLIST gather_process_list = true # ## gather auto_increment columns and max values from information schema gather_info_schema_auto_inc = true # ## gather metrics from SHOW SLAVE STATUS command output gather_slave_status = true # ## gather metrics from SHOW BINARY LOGS command output gather_binary_logs = false # ## gather metrics from PERFORMANCE_SCHEMA.TABLE_IO_WAITS_SUMMARY_BY_TABLE gather_table_io_waits = false # ## gather metrics from PERFORMANCE_SCHEMA.TABLE_LOCK_WAITS gather_table_lock_waits = false # ## gather metrics from PERFORMANCE_SCHEMA.TABLE_IO_WAITS_SUMMARY_BY_INDEX_USAGE gather_index_io_waits = false # ## gather metrics from PERFORMANCE_SCHEMA.EVENT_WAITS gather_event_waits = false # ## gather metrics from PERFORMANCE_SCHEMA.FILE_SUMMARY_BY_EVENT_NAME gather_file_events_stats = false # ## gather metrics from PERFORMANCE_SCHEMA.EVENTS_STATEMENTS_SUMMARY_BY_DIGEST gather_perf_events_statements = false # ## Some queries we may want to run less often (such as SHOW GLOBAL VARIABLES) interval_slow = "30m" ``` ## Measurements & Fields * Global statuses - all numeric and boolean values of `SHOW GLOBAL STATUSES` * Global variables - all numeric and boolean values of `SHOW GLOBAL VARIABLES` * Slave status - metrics from `SHOW SLAVE STATUS` the metrics are gathered when the single-source replication is on. If the multi-source replication is set, then everything works differently, this metric does not work with multi-source replication. * slave_[column name]() * Binary logs - all metrics including size and count of all binary files. Requires to be turned on in configuration. * binary_size_bytes(int, number) * binary_files_count(int, number) * Process list - connection metrics from processlist for each user. It has the following tags * connections(int, number) * Perf Table IO waits - total count and time of I/O waits event for each table and process. It has following fields: * table_io_waits_total_fetch(float, number) * table_io_waits_total_insert(float, number) * table_io_waits_total_update(float, number) * table_io_waits_total_delete(float, number) * table_io_waits_seconds_total_fetch(float, milliseconds) * table_io_waits_seconds_total_insert(float, milliseconds) * table_io_waits_seconds_total_update(float, milliseconds) * table_io_waits_seconds_total_delete(float, milliseconds) * Perf index IO waits - total count and time of I/O waits event for each index and process. It has following fields: * index_io_waits_total_fetch(float, number) * index_io_waits_seconds_total_fetch(float, milliseconds) * index_io_waits_total_insert(float, number) * index_io_waits_total_update(float, number) * index_io_waits_total_delete(float, number) * index_io_waits_seconds_total_insert(float, milliseconds) * index_io_waits_seconds_total_update(float, milliseconds) * index_io_waits_seconds_total_delete(float, milliseconds) * Info schema autoincrement statuses - autoincrement fields and max values for them. It has following fields: * auto_increment_column(int, number) * auto_increment_column_max(int, number) * Perf table lock waits - gathers total number and time for SQL and external lock waits events for each table and operation. It has following fields. The unit of fields varies by the tags. * read_normal(float, number/milliseconds) * read_with_shared_locks(float, number/milliseconds) * read_high_priority(float, number/milliseconds) * read_no_insert(float, number/milliseconds) * write_normal(float, number/milliseconds) * write_allow_write(float, number/milliseconds) * write_concurrent_insert(float, number/milliseconds) * write_low_priority(float, number/milliseconds) * read(float, number/milliseconds) * write(float, number/milliseconds) * Perf events waits - gathers total time and number of event waits * events_waits_total(float, number) * events_waits_seconds_total(float, milliseconds) * Perf file events statuses - gathers file events statuses * file_events_total(float,number) * file_events_seconds_total(float, milliseconds) * file_events_bytes_total(float, bytes) * Perf events statements - gathers attributes of each event * events_statements_total(float, number) * events_statements_seconds_total(float, millieconds) * events_statements_errors_total(float, number) * events_statements_warnings_total(float, number) * events_statements_rows_affected_total(float, number) * events_statements_rows_sent_total(float, number) * events_statements_rows_examined_total(float, number) * events_statements_tmp_tables_total(float, number) * events_statements_tmp_disk_tables_total(float, number) * events_statements_sort_merge_passes_totales(float, number) * events_statements_sort_rows_total(float, number) * events_statements_no_index_used_total(float, number) * Table schema - gathers statistics of each schema. It has following measurements * info_schema_table_rows(float, number) * info_schema_table_size_data_length(float, number) * info_schema_table_size_index_length(float, number) * info_schema_table_size_data_free(float, number) * info_schema_table_version(float, number) ## Tags * All measurements has following tags * server (the host name from which the metrics are gathered) * Process list measurement has following tags * user (username for whom the metrics are gathered) * Perf table IO waits measurement has following tags * schema * name (object name for event or process) * Perf index IO waits has following tags * schema * name * index * Info schema autoincrement statuses has following tags * schema * table * column * Perf table lock waits has following tags * schema * table * sql_lock_waits_total(fields including this tag have numeric unit) * external_lock_waits_total(fields including this tag have numeric unit) * sql_lock_waits_seconds_total(fields including this tag have millisecond unit) * external_lock_waits_seconds_total(fields including this tag have millisecond unit) * Perf events statements has following tags * event_name * Perf file events statuses has following tags * event_name * mode * Perf file events statements has following tags * schema * digest * digest_text * Table schema has following tags * schema * table * component * type * engine * row_format * create_options