package mysql import ( "bytes" "database/sql" "fmt" "net/url" "strconv" "strings" "time" _ "github.com/go-sql-driver/mysql" "github.com/influxdata/telegraf" "github.com/influxdata/telegraf/plugins/inputs" ) type Mysql struct { Servers []string `toml:"servers"` PerfEventsStatementsDigestTextLimit int64 `toml:"perf_events_statements_digest_text_limit"` PerfEventsStatementsLimit int64 `toml:"perf_events_statements_limit"` PerfEventsStatementsTimeLimit int64 `toml:"perf_events_statemetns_time_limit"` TableSchemaDatabases []string `toml:"table_schema_databases"` GatherProcessList bool `toml:"gather_process_list"` GatherInfoSchemaAutoInc bool `toml:"gather_info_schema_auto_inc"` GatherSlaveStatus bool `toml:"gather_slave_status"` GatherBinaryLogs bool `toml:"gather_binary_logs"` GatherTableIOWaits bool `toml:"gather_table_io_waits"` GatherIndexIOWaits bool `toml:"gather_index_io_waits"` GatherTableSchema bool `toml:"gather_table_schema"` GatherFileEventsStats bool `toml:"gather_file_events_stats"` GatherPerfEventsStatements bool `toml:"gather_perf_events_statements"` IntervalSlow string `toml:"interval_slow"` } var sampleConfig = ` # 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. # root:passwd@tcp(127.0.0.1:3306)/?tls=false # root@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 databasee 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_SUMMART_BY_TABLE gather_table_io_waits = false # gather metrics from PERFORMANCE_SCHEMA.TABLE_IO_WAITS_SUMMART_BY_INDEX_USAGE gather_index_io_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" ` var defaultTimeout = time.Second * time.Duration(5) func (m *Mysql) SampleConfig() string { return sampleConfig } func (m *Mysql) Description() string { return "Read metrics from one or many mysql servers" } var ( localhost = "" lastT time.Time initDone = false scanIntervalSlow uint32 ) func (m *Mysql) InitMysql() { if len(m.IntervalSlow) > 0 { interval, err := time.ParseDuration(m.IntervalSlow) if err == nil && interval.Seconds() >= 1.0 { scanIntervalSlow = uint32(interval.Seconds()) } } initDone = true } func (m *Mysql) Gather(acc telegraf.Accumulator) error { if len(m.Servers) == 0 { // if we can't get stats in this case, thats fine, don't report // an error. m.gatherServer(localhost, acc) return nil } // Initialise additional query intervals if !initDone { m.InitMysql() } // Loop through each server and collect metrics for _, serv := range m.Servers { err := m.gatherServer(serv, acc) if err != nil { return err } } return nil } type mapping struct { onServer string inExport string } var mappings = []*mapping{ { onServer: "Aborted_", inExport: "aborted_", }, { onServer: "Bytes_", inExport: "bytes_", }, { onServer: "Com_", inExport: "commands_", }, { onServer: "Created_", inExport: "created_", }, { onServer: "Handler_", inExport: "handler_", }, { onServer: "Innodb_", inExport: "innodb_", }, { onServer: "Key_", inExport: "key_", }, { onServer: "Open_", inExport: "open_", }, { onServer: "Opened_", inExport: "opened_", }, { onServer: "Qcache_", inExport: "qcache_", }, { onServer: "Table_", inExport: "table_", }, { onServer: "Tokudb_", inExport: "tokudb_", }, { onServer: "Threads_", inExport: "threads_", }, { onServer: "Access_", inExport: "access_", }, { onServer: "Aria__", inExport: "aria_", }, { onServer: "Binlog__", inExport: "binlog_", }, { onServer: "Busy_", inExport: "busy_", }, { onServer: "Connection_", inExport: "connection_", }, { onServer: "Delayed_", inExport: "delayed_", }, { onServer: "Empty_", inExport: "empty_", }, { onServer: "Executed_", inExport: "executed_", }, { onServer: "Executed_", inExport: "executed_", }, { onServer: "Feature_", inExport: "feature_", }, { onServer: "Flush_", inExport: "flush_", }, { onServer: "Last_", inExport: "last_", }, { onServer: "Master_", inExport: "master_", }, { onServer: "Max_", inExport: "max_", }, { onServer: "Memory_", inExport: "memory_", }, { onServer: "Not_", inExport: "not_", }, { onServer: "Performance_", inExport: "performance_", }, { onServer: "Prepared_", inExport: "prepared_", }, { onServer: "Rows_", inExport: "rows_", }, { onServer: "Rpl_", inExport: "rpl_", }, { onServer: "Select_", inExport: "select_", }, { onServer: "Slave_", inExport: "slave_", }, { onServer: "Slow_", inExport: "slow_", }, { onServer: "Sort_", inExport: "sort_", }, { onServer: "Subquery_", inExport: "subquery_", }, { onServer: "Tc_", inExport: "tc_", }, { onServer: "Threadpool_", inExport: "threadpool_", }, } var ( // status counter generalThreadStates = map[string]uint32{ "after create": uint32(0), "altering table": uint32(0), "analyzing": uint32(0), "checking permissions": uint32(0), "checking table": uint32(0), "cleaning up": uint32(0), "closing tables": uint32(0), "converting heap to myisam": uint32(0), "copying to tmp table": uint32(0), "creating sort index": uint32(0), "creating table": uint32(0), "creating tmp table": uint32(0), "deleting": uint32(0), "executing": uint32(0), "execution of init_command": uint32(0), "end": uint32(0), "freeing items": uint32(0), "flushing tables": uint32(0), "fulltext initialization": uint32(0), "idle": uint32(0), "init": uint32(0), "killed": uint32(0), "waiting for lock": uint32(0), "logging slow query": uint32(0), "login": uint32(0), "manage keys": uint32(0), "opening tables": uint32(0), "optimizing": uint32(0), "preparing": uint32(0), "reading from net": uint32(0), "removing duplicates": uint32(0), "removing tmp table": uint32(0), "reopen tables": uint32(0), "repair by sorting": uint32(0), "repair done": uint32(0), "repair with keycache": uint32(0), "replication master": uint32(0), "rolling back": uint32(0), "searching rows for update": uint32(0), "sending data": uint32(0), "sorting for group": uint32(0), "sorting for order": uint32(0), "sorting index": uint32(0), "sorting result": uint32(0), "statistics": uint32(0), "updating": uint32(0), "waiting for tables": uint32(0), "waiting for table flush": uint32(0), "waiting on cond": uint32(0), "writing to net": uint32(0), "other": uint32(0), } // plaintext statuses stateStatusMappings = map[string]string{ "user sleep": "idle", "creating index": "altering table", "committing alter table to storage engine": "altering table", "discard or import tablespace": "altering table", "rename": "altering table", "setup": "altering table", "renaming result table": "altering table", "preparing for alter table": "altering table", "copying to group table": "copying to tmp table", "copy to tmp table": "copying to tmp table", "query end": "end", "update": "updating", "updating main table": "updating", "updating reference tables": "updating", "system lock": "waiting for lock", "user lock": "waiting for lock", "table lock": "waiting for lock", "deleting from main table": "deleting", "deleting from reference tables": "deleting", } ) func dsnAddTimeout(dsn string) (string, error) { // DSN "?timeout=5s" is not valid, but "/?timeout=5s" is valid ("" and "/" // are the same DSN) if dsn == "" { dsn = "/" } u, err := url.Parse(dsn) if err != nil { return "", err } v := u.Query() // Only override timeout if not already defined if _, ok := v["timeout"]; ok == false { v.Add("timeout", defaultTimeout.String()) u.RawQuery = v.Encode() } return u.String(), nil } // Math constants const ( picoSeconds = 1e12 ) // metric queries const ( globalStatusQuery = `SHOW GLOBAL STATUS` globalVariablesQuery = `SHOW GLOBAL VARIABLES` slaveStatusQuery = `SHOW SLAVE STATUS` binaryLogsQuery = `SHOW BINARY LOGS` infoSchemaProcessListQuery = ` SELECT COALESCE(command,''),COALESCE(state,''),count(*) FROM information_schema.processlist WHERE ID != connection_id() GROUP BY command,state ORDER BY null` infoSchemaAutoIncQuery = ` SELECT table_schema, table_name, column_name, auto_increment, CAST(pow(2, case data_type when 'tinyint' then 7 when 'smallint' then 15 when 'mediumint' then 23 when 'int' then 31 when 'bigint' then 63 end+(column_type like '% unsigned'))-1 as decimal(19)) as max_int FROM information_schema.tables t JOIN information_schema.columns c USING (table_schema,table_name) WHERE c.extra = 'auto_increment' AND t.auto_increment IS NOT NULL ` perfTableIOWaitsQuery = ` SELECT OBJECT_SCHEMA, OBJECT_NAME, COUNT_FETCH, COUNT_INSERT, COUNT_UPDATE, COUNT_DELETE, SUM_TIMER_FETCH, SUM_TIMER_INSERT, SUM_TIMER_UPDATE, SUM_TIMER_DELETE FROM performance_schema.table_io_waits_summary_by_table WHERE OBJECT_SCHEMA NOT IN ('mysql', 'performance_schema') ` perfIndexIOWaitsQuery = ` SELECT OBJECT_SCHEMA, OBJECT_NAME, ifnull(INDEX_NAME, 'NONE') as INDEX_NAME, COUNT_FETCH, COUNT_INSERT, COUNT_UPDATE, COUNT_DELETE, SUM_TIMER_FETCH, SUM_TIMER_INSERT, SUM_TIMER_UPDATE, SUM_TIMER_DELETE FROM performance_schema.table_io_waits_summary_by_index_usage WHERE OBJECT_SCHEMA NOT IN ('mysql', 'performance_schema') ` perfTableLockWaitsQuery = ` SELECT OBJECT_SCHEMA, OBJECT_NAME, COUNT_READ_NORMAL, COUNT_READ_WITH_SHARED_LOCKS, COUNT_READ_HIGH_PRIORITY, COUNT_READ_NO_INSERT, COUNT_READ_EXTERNAL, COUNT_WRITE_ALLOW_WRITE, COUNT_WRITE_CONCURRENT_INSERT, COUNT_WRITE_DELAYED, COUNT_WRITE_LOW_PRIORITY, COUNT_WRITE_NORMAL, COUNT_WRITE_EXTERNAL, SUM_TIMER_READ_NORMAL, SUM_TIMER_READ_WITH_SHARED_LOCKS, SUM_TIMER_READ_HIGH_PRIORITY, SUM_TIMER_READ_NO_INSERT, SUM_TIMER_READ_EXTERNAL, SUM_TIMER_WRITE_ALLOW_WRITE, SUM_TIMER_WRITE_CONCURRENT_INSERT, SUM_TIMER_WRITE_DELAYED, SUM_TIMER_WRITE_LOW_PRIORITY, SUM_TIMER_WRITE_NORMAL, SUM_TIMER_WRITE_EXTERNAL FROM performance_schema.table_lock_waits_summary_by_table WHERE OBJECT_SCHEMA NOT IN ('mysql', 'performance_schema', 'information_schema') ` perfEventsStatementsQuery = ` SELECT ifnull(SCHEMA_NAME, 'NONE') as SCHEMA_NAME, DIGEST, LEFT(DIGEST_TEXT, %d) as DIGEST_TEXT, COUNT_STAR, SUM_TIMER_WAIT, SUM_ERRORS, SUM_WARNINGS, SUM_ROWS_AFFECTED, SUM_ROWS_SENT, SUM_ROWS_EXAMINED, SUM_CREATED_TMP_DISK_TABLES, SUM_CREATED_TMP_TABLES, SUM_SORT_MERGE_PASSES, SUM_SORT_ROWS, SUM_NO_INDEX_USED FROM performance_schema.events_statements_summary_by_digest WHERE SCHEMA_NAME NOT IN ('mysql', 'performance_schema', 'information_schema') AND last_seen > DATE_SUB(NOW(), INTERVAL %d SECOND) ORDER BY SUM_TIMER_WAIT DESC LIMIT %d ` perfEventWaitsQuery = ` SELECT EVENT_NAME, COUNT_STAR, SUM_TIMER_WAIT FROM performance_schema.events_waits_summary_global_by_event_name ` perfFileEventsQuery = ` SELECT EVENT_NAME, COUNT_READ, SUM_TIMER_READ, SUM_NUMBER_OF_BYTES_READ, COUNT_WRITE, SUM_TIMER_WRITE, SUM_NUMBER_OF_BYTES_WRITE, COUNT_MISC, SUM_TIMER_MISC FROM performance_schema.file_summary_by_event_name ` tableSchemaQuery = ` SELECT TABLE_SCHEMA, TABLE_NAME, TABLE_TYPE, ifnull(ENGINE, 'NONE') as ENGINE, ifnull(VERSION, '0') as VERSION, ifnull(ROW_FORMAT, 'NONE') as ROW_FORMAT, ifnull(TABLE_ROWS, '0') as TABLE_ROWS, ifnull(DATA_LENGTH, '0') as DATA_LENGTH, ifnull(INDEX_LENGTH, '0') as INDEX_LENGTH, ifnull(DATA_FREE, '0') as DATA_FREE, ifnull(CREATE_OPTIONS, 'NONE') as CREATE_OPTIONS FROM information_schema.tables WHERE TABLE_SCHEMA = '%s' ` dbListQuery = ` SELECT SCHEMA_NAME FROM information_schema.schemata WHERE SCHEMA_NAME NOT IN ('mysql', 'performance_schema', 'information_schema') ` perfSchemaTablesQuery = ` SELECT table_name FROM information_schema.tables WHERE table_schema = 'performance_schema' AND table_name = ? ` ) func (m *Mysql) gatherServer(serv string, acc telegraf.Accumulator) error { serv, err := dsnAddTimeout(serv) if err != nil { return err } db, err := sql.Open("mysql", serv) if err != nil { return err } defer db.Close() err = m.gatherGlobalStatuses(db, serv, acc) if err != nil { return err } // Global Variables may be gathered less often if len(m.IntervalSlow) > 0 { if uint32(time.Since(lastT).Seconds()) > scanIntervalSlow { err = m.gatherGlobalVariables(db, serv, acc) if err != nil { return err } lastT = time.Now() } else { err = m.gatherGlobalVariables(db, serv, acc) if err != nil { return err } } } if m.GatherBinaryLogs { err = m.gatherBinaryLogs(db, serv, acc) if err != nil { return err } } if m.GatherProcessList { err = m.GatherProcessListStatuses(db, serv, acc) if err != nil { return err } } if m.GatherSlaveStatus { err = m.gatherSlaveStatuses(db, serv, acc) if err != nil { return err } } if m.GatherInfoSchemaAutoInc { err = m.gatherInfoSchemaAutoIncStatuses(db, serv, acc) if err != nil { return err } } if m.GatherTableIOWaits { err = m.gatherPerfTableIOWaits(db, serv, acc) if err != nil { return err } } if m.GatherIndexIOWaits { err = m.gatherPerfIndexIOWaits(db, serv, acc) if err != nil { return err } } err = m.gatherPerfTableLockWaits(db, serv, acc) if err != nil { return err } err = m.gatherPerfEventWaits(db, serv, acc) if err != nil { return err } if m.GatherFileEventsStats { err = m.gatherPerfFileEventsStatuses(db, serv, acc) if err != nil { return err } } if m.GatherPerfEventsStatements { err = m.gatherPerfEventsStatements(db, serv, acc) if err != nil { return err } } if m.GatherTableSchema { err = m.gatherTableSchema(db, serv, acc) if err != nil { return err } } return nil } // gatherGlobalVariables can be used to fetch all global variables from // MySQL environment. func (m *Mysql) gatherGlobalVariables(db *sql.DB, serv string, acc telegraf.Accumulator) error { // run query rows, err := db.Query(globalVariablesQuery) if err != nil { return err } defer rows.Close() var key string var val sql.RawBytes // parse DSN and save server tag servtag, err := parseDSN(serv) if err != nil { servtag = "localhost" } tags := map[string]string{"server": servtag} fields := make(map[string]interface{}) for rows.Next() { if err := rows.Scan(&key, &val); err != nil { return err } key = strings.ToLower(key) // parse value, if it is numeric then save, otherwise ignore if floatVal, ok := parseValue(val); ok { fields[key] = floatVal } // Send 20 fields at a time if len(fields) >= 20 { acc.AddFields("mysql_variables", fields, tags) fields = make(map[string]interface{}) } } // Send any remaining fields if len(fields) > 0 { acc.AddFields("mysql_variables", fields, tags) } return nil } // gatherSlaveStatuses can be used to get replication analytics // When the server is slave, then it returns only one row. // If the multi-source replication is set, then everything works differently // This code does not work with multi-source replication. func (m *Mysql) gatherSlaveStatuses(db *sql.DB, serv string, acc telegraf.Accumulator) error { // run query rows, err := db.Query(slaveStatusQuery) if err != nil { return err } defer rows.Close() servtag, err := parseDSN(serv) if err != nil { servtag = "localhost" } tags := map[string]string{"server": servtag} fields := make(map[string]interface{}) // to save the column names as a field key // scanning keys and values separately if rows.Next() { // get columns names, and create an array with its length cols, err := rows.Columns() if err != nil { return err } vals := make([]interface{}, len(cols)) // fill the array with sql.Rawbytes for i := range vals { vals[i] = &sql.RawBytes{} } if err = rows.Scan(vals...); err != nil { return err } // range over columns, and try to parse values for i, col := range cols { // skip unparsable values if value, ok := parseValue(*vals[i].(*sql.RawBytes)); ok { fields["slave_"+col] = value } } acc.AddFields("mysql", fields, tags) } return nil } // gatherBinaryLogs can be used to collect size and count of all binary files // binlogs metric requires the MySQL server to turn it on in configuration func (m *Mysql) gatherBinaryLogs(db *sql.DB, serv string, acc telegraf.Accumulator) error { // run query rows, err := db.Query(binaryLogsQuery) if err != nil { return err } defer rows.Close() // parse DSN and save host as a tag var servtag string servtag, err = parseDSN(serv) if err != nil { servtag = "localhost" } tags := map[string]string{"server": servtag} var ( size uint64 = 0 count uint64 = 0 fileSize uint64 fileName string ) // iterate over rows and count the size and count of files for rows.Next() { if err := rows.Scan(&fileName, &fileSize); err != nil { return err } size += fileSize count++ } fields := map[string]interface{}{ "binary_size_bytes": size, "binary_files_count": count, } acc.AddFields("mysql", fields, tags) return nil } // gatherGlobalStatuses can be used to get MySQL status metrics // the mappings of actual names and names of each status to be exported // to output is provided on mappings variable func (m *Mysql) gatherGlobalStatuses(db *sql.DB, serv string, acc telegraf.Accumulator) error { // If user forgot the '/', add it if strings.HasSuffix(serv, ")") { serv = serv + "/" } else if serv == "localhost" { serv = "" } // run query rows, err := db.Query(globalStatusQuery) if err != nil { return err } // parse the DSN and save host name as a tag var servtag string servtag, err = parseDSN(serv) if err != nil { servtag = "localhost" } tags := map[string]string{"server": servtag} fields := make(map[string]interface{}) for rows.Next() { var name string var val interface{} err = rows.Scan(&name, &val) if err != nil { return err } var found bool // iterate over mappings and gather metrics that is provided on mapping for _, mapped := range mappings { if strings.HasPrefix(name, mapped.onServer) { // convert numeric values to integer i, _ := strconv.Atoi(string(val.([]byte))) fields[mapped.inExport+name[len(mapped.onServer):]] = i found = true } } // Send 20 fields at a time if len(fields) >= 20 { acc.AddFields("mysql", fields, tags) fields = make(map[string]interface{}) } if found { continue } // search for specific values switch name { case "Queries": i, err := strconv.ParseInt(string(val.([]byte)), 10, 64) if err != nil { return err } fields["queries"] = i case "Slow_queries": i, err := strconv.ParseInt(string(val.([]byte)), 10, 64) if err != nil { return err } fields["slow_queries"] = i case "Connections": i, err := strconv.ParseInt(string(val.([]byte)), 10, 64) if err != nil { return err } fields["connections"] = i case "Syncs": i, err := strconv.ParseInt(string(val.([]byte)), 10, 64) if err != nil { return err } fields["syncs"] = i } } // Send any remaining fields if len(fields) > 0 { acc.AddFields("mysql", fields, tags) } // gather connection metrics from processlist for each user if m.GatherProcessList { conn_rows, err := db.Query("SELECT user, sum(1) FROM INFORMATION_SCHEMA.PROCESSLIST GROUP BY user") for conn_rows.Next() { var user string var connections int64 err = conn_rows.Scan(&user, &connections) if err != nil { return err } tags := map[string]string{"server": servtag, "user": user} fields := make(map[string]interface{}) if err != nil { return err } fields["connections"] = connections acc.AddFields("mysql_users", fields, tags) } } return nil } // GatherProcessList can be used to collect metrics on each running command // and its state with its running count func (m *Mysql) GatherProcessListStatuses(db *sql.DB, serv string, acc telegraf.Accumulator) error { // run query rows, err := db.Query(infoSchemaProcessListQuery) if err != nil { return err } defer rows.Close() var ( command string state string count uint32 ) var servtag string fields := make(map[string]interface{}) servtag, err = parseDSN(serv) if err != nil { servtag = "localhost" } // mapping of state with its counts stateCounts := make(map[string]uint32, len(generalThreadStates)) // set map with keys and default values for k, v := range generalThreadStates { stateCounts[k] = v } for rows.Next() { err = rows.Scan(&command, &state, &count) if err != nil { return err } // each state has its mapping foundState := findThreadState(command, state) // count each state stateCounts[foundState] += count } tags := map[string]string{"server": servtag} for s, c := range stateCounts { fields[newNamespace("threads", s)] = c } acc.AddFields("mysql_info_schema", fields, tags) return nil } // gatherPerfTableIOWaits can be used to get total count and time // of I/O wait event for each table and process func (m *Mysql) gatherPerfTableIOWaits(db *sql.DB, serv string, acc telegraf.Accumulator) error { rows, err := db.Query(perfTableIOWaitsQuery) if err != nil { return err } defer rows.Close() var ( objSchema, objName, servtag string countFetch, countInsert, countUpdate, countDelete float64 timeFetch, timeInsert, timeUpdate, timeDelete float64 ) servtag, err = parseDSN(serv) if err != nil { servtag = "localhost" } for rows.Next() { err = rows.Scan(&objSchema, &objName, &countFetch, &countInsert, &countUpdate, &countDelete, &timeFetch, &timeInsert, &timeUpdate, &timeDelete, ) if err != nil { return err } tags := map[string]string{ "server": servtag, "schema": objSchema, "name": objName, } fields := map[string]interface{}{ "table_io_waits_total_fetch": countFetch, "table_io_waits_total_insert": countInsert, "table_io_waits_total_update": countUpdate, "table_io_waits_total_delete": countDelete, "table_io_waits_seconds_total_fetch": timeFetch / picoSeconds, "table_io_waits_seconds_total_insert": timeInsert / picoSeconds, "table_io_waits_seconds_total_update": timeUpdate / picoSeconds, "table_io_waits_seconds_total_delete": timeDelete / picoSeconds, } acc.AddFields("mysql_perf_schema", fields, tags) } return nil } // gatherPerfIndexIOWaits can be used to get total count and time // of I/O wait event for each index and process func (m *Mysql) gatherPerfIndexIOWaits(db *sql.DB, serv string, acc telegraf.Accumulator) error { rows, err := db.Query(perfIndexIOWaitsQuery) if err != nil { return err } defer rows.Close() var ( objSchema, objName, indexName, servtag string countFetch, countInsert, countUpdate, countDelete float64 timeFetch, timeInsert, timeUpdate, timeDelete float64 ) servtag, err = parseDSN(serv) if err != nil { servtag = "localhost" } for rows.Next() { err = rows.Scan(&objSchema, &objName, &indexName, &countFetch, &countInsert, &countUpdate, &countDelete, &timeFetch, &timeInsert, &timeUpdate, &timeDelete, ) if err != nil { return err } tags := map[string]string{ "server": servtag, "schema": objSchema, "name": objName, "index": indexName, } fields := map[string]interface{}{ "index_io_waits_total_fetch": countFetch, "index_io_waits_seconds_total_fetch": timeFetch / picoSeconds, } // update write columns only when index is NONE if indexName == "NONE" { fields["index_io_waits_total_insert"] = countInsert fields["index_io_waits_total_update"] = countUpdate fields["index_io_waits_total_delete"] = countDelete fields["index_io_waits_seconds_total_insert"] = timeInsert / picoSeconds fields["index_io_waits_seconds_total_update"] = timeUpdate / picoSeconds fields["index_io_waits_seconds_total_delete"] = timeDelete / picoSeconds } acc.AddFields("mysql_perf_schema", fields, tags) } return nil } // gatherInfoSchemaAutoIncStatuses can be used to get auto incremented values of the column func (m *Mysql) gatherInfoSchemaAutoIncStatuses(db *sql.DB, serv string, acc telegraf.Accumulator) error { rows, err := db.Query(infoSchemaAutoIncQuery) if err != nil { return err } defer rows.Close() var ( schema, table, column string incValue, maxInt uint64 ) servtag, err := parseDSN(serv) if err != nil { servtag = "localhost" } for rows.Next() { if err := rows.Scan(&schema, &table, &column, &incValue, &maxInt); err != nil { return err } tags := map[string]string{ "server": servtag, "schema": schema, "table": table, "column": column, } fields := make(map[string]interface{}) fields["auto_increment_column"] = incValue fields["auto_increment_column_max"] = maxInt acc.AddFields("mysql_info_schema", fields, tags) } return nil } // gatherPerfTableLockWaits can be used to get // the total number and time for SQL and external lock wait events // for each table and operation // requires the MySQL server to be enabled to save this metric func (m *Mysql) gatherPerfTableLockWaits(db *sql.DB, serv string, acc telegraf.Accumulator) error { // check if table exists, // if performance_schema is not enabled, tables do not exist // then there is no need to scan them var tableName string err := db.QueryRow(perfSchemaTablesQuery, "table_lock_waits_summary_by_table").Scan(&tableName) switch { case err == sql.ErrNoRows: return nil case err != nil: return err } rows, err := db.Query(perfTableLockWaitsQuery) if err != nil { return err } defer rows.Close() servtag, err := parseDSN(serv) if err != nil { servtag = "localhost" } var ( objectSchema string objectName string countReadNormal float64 countReadWithSharedLocks float64 countReadHighPriority float64 countReadNoInsert float64 countReadExternal float64 countWriteAllowWrite float64 countWriteConcurrentInsert float64 countWriteDelayed float64 countWriteLowPriority float64 countWriteNormal float64 countWriteExternal float64 timeReadNormal float64 timeReadWithSharedLocks float64 timeReadHighPriority float64 timeReadNoInsert float64 timeReadExternal float64 timeWriteAllowWrite float64 timeWriteConcurrentInsert float64 timeWriteDelayed float64 timeWriteLowPriority float64 timeWriteNormal float64 timeWriteExternal float64 ) for rows.Next() { err = rows.Scan( &objectSchema, &objectName, &countReadNormal, &countReadWithSharedLocks, &countReadHighPriority, &countReadNoInsert, &countReadExternal, &countWriteAllowWrite, &countWriteConcurrentInsert, &countWriteDelayed, &countWriteLowPriority, &countWriteNormal, &countWriteExternal, &timeReadNormal, &timeReadWithSharedLocks, &timeReadHighPriority, &timeReadNoInsert, &timeReadExternal, &timeWriteAllowWrite, &timeWriteConcurrentInsert, &timeWriteDelayed, &timeWriteLowPriority, &timeWriteNormal, &timeWriteExternal, ) if err != nil { return err } tags := map[string]string{ "server": servtag, "schema": objectSchema, "table": objectName, } sqlLWTags := copyTags(tags) sqlLWTags["perf_query"] = "sql_lock_waits_total" sqlLWFields := map[string]interface{}{ "read_normal": countReadNormal, "read_with_shared_locks": countReadWithSharedLocks, "read_high_priority": countReadHighPriority, "read_no_insert": countReadNoInsert, "write_normal": countWriteNormal, "write_allow_write": countWriteAllowWrite, "write_concurrent_insert": countWriteConcurrentInsert, "write_delayed": countWriteDelayed, "write_low_priority": countWriteLowPriority, } acc.AddFields("mysql_perf_schema", sqlLWFields, sqlLWTags) externalLWTags := copyTags(tags) externalLWTags["perf_query"] = "external_lock_waits_total" externalLWFields := map[string]interface{}{ "read": countReadExternal, "write": countWriteExternal, } acc.AddFields("mysql_perf_schema", externalLWFields, externalLWTags) sqlLWSecTotalTags := copyTags(tags) sqlLWSecTotalTags["perf_query"] = "sql_lock_waits_seconds_total" sqlLWSecTotalFields := map[string]interface{}{ "read_normal": timeReadNormal / picoSeconds, "read_with_shared_locks": timeReadWithSharedLocks / picoSeconds, "read_high_priority": timeReadHighPriority / picoSeconds, "read_no_insert": timeReadNoInsert / picoSeconds, "write_normal": timeWriteNormal / picoSeconds, "write_allow_write": timeWriteAllowWrite / picoSeconds, "write_concurrent_insert": timeWriteConcurrentInsert / picoSeconds, "write_delayed": timeWriteDelayed / picoSeconds, "write_low_priority": timeWriteLowPriority / picoSeconds, } acc.AddFields("mysql_perf_schema", sqlLWSecTotalFields, sqlLWSecTotalTags) externalLWSecTotalTags := copyTags(tags) externalLWSecTotalTags["perf_query"] = "external_lock_waits_seconds_total" externalLWSecTotalFields := map[string]interface{}{ "read": timeReadExternal / picoSeconds, "write": timeWriteExternal / picoSeconds, } acc.AddFields("mysql_perf_schema", externalLWSecTotalFields, externalLWSecTotalTags) } return nil } // gatherPerfEventWaits can be used to get total time and number of event waits func (m *Mysql) gatherPerfEventWaits(db *sql.DB, serv string, acc telegraf.Accumulator) error { rows, err := db.Query(perfEventWaitsQuery) if err != nil { return err } defer rows.Close() var ( event string starCount, timeWait float64 ) servtag, err := parseDSN(serv) if err != nil { servtag = "localhost" } tags := map[string]string{ "server": servtag, } for rows.Next() { if err := rows.Scan(&event, &starCount, &timeWait); err != nil { return err } tags["event_name"] = event fields := map[string]interface{}{ "events_waits_total": starCount, "events_waits_seconds_total": timeWait / picoSeconds, } acc.AddFields("mysql_perf_schema", fields, tags) } return nil } // gatherPerfFileEvents can be used to get stats on file events func (m *Mysql) gatherPerfFileEventsStatuses(db *sql.DB, serv string, acc telegraf.Accumulator) error { rows, err := db.Query(perfFileEventsQuery) if err != nil { return err } defer rows.Close() var ( eventName string countRead, countWrite, countMisc float64 sumTimerRead, sumTimerWrite, sumTimerMisc float64 sumNumBytesRead, sumNumBytesWrite float64 ) servtag, err := parseDSN(serv) if err != nil { servtag = "localhost" } tags := map[string]string{ "server": servtag, } for rows.Next() { err = rows.Scan( &eventName, &countRead, &sumTimerRead, &sumNumBytesRead, &countWrite, &sumTimerWrite, &sumNumBytesWrite, &countMisc, &sumTimerMisc, ) if err != nil { return err } tags["event_name"] = eventName fields := make(map[string]interface{}) miscTags := copyTags(tags) miscTags["mode"] = "misc" fields["file_events_total"] = countWrite fields["file_events_seconds_total"] = sumTimerMisc / picoSeconds acc.AddFields("mysql_perf_schema", fields, miscTags) readTags := copyTags(tags) readTags["mode"] = "read" fields["file_events_total"] = countRead fields["file_events_seconds_total"] = sumTimerRead / picoSeconds fields["file_events_bytes_totals"] = sumNumBytesRead acc.AddFields("mysql_perf_schema", fields, readTags) writeTags := copyTags(tags) writeTags["mode"] = "write" fields["file_events_total"] = countWrite fields["file_events_seconds_total"] = sumTimerWrite / picoSeconds fields["file_events_bytes_totals"] = sumNumBytesWrite acc.AddFields("mysql_perf_schema", fields, writeTags) } return nil } // gatherPerfEventsStatements can be used to get attributes of each event func (m *Mysql) gatherPerfEventsStatements(db *sql.DB, serv string, acc telegraf.Accumulator) error { query := fmt.Sprintf( perfEventsStatementsQuery, m.PerfEventsStatementsDigestTextLimit, m.PerfEventsStatementsTimeLimit, m.PerfEventsStatementsLimit, ) rows, err := db.Query(query) if err != nil { return err } defer rows.Close() var ( schemaName, digest, digest_text string count, queryTime, errors, warnings float64 rowsAffected, rowsSent, rowsExamined float64 tmpTables, tmpDiskTables float64 sortMergePasses, sortRows float64 noIndexUsed float64 ) servtag, err := parseDSN(serv) if err != nil { servtag = "localhost" } tags := map[string]string{ "server": servtag, } for rows.Next() { err = rows.Scan( &schemaName, &digest, &digest_text, &count, &queryTime, &errors, &warnings, &rowsAffected, &rowsSent, &rowsExamined, &tmpTables, &tmpDiskTables, &sortMergePasses, &sortRows, ) if err != nil { return err } tags["schema"] = schemaName tags["digest"] = digest tags["digest_text"] = digest_text fields := map[string]interface{}{ "events_statements_total": count, "events_statements_seconds_total": queryTime / picoSeconds, "events_statements_errors_total": errors, "events_statements_warnings_total": warnings, "events_statements_rows_affected_total": rowsAffected, "events_statements_rows_sent_total": rowsSent, "events_statements_rows_examined_total": rowsExamined, "events_statements_tmp_tables_total": tmpTables, "events_statements_tmp_disk_tables_total": tmpDiskTables, "events_statements_sort_merge_passes_total": sortMergePasses, "events_statements_sort_rows_total": sortRows, "events_statements_no_index_used_total": noIndexUsed, } acc.AddFields("mysql_perf_schema", fields, tags) } return nil } // gatherTableSchema can be used to gather stats on each schema func (m *Mysql) gatherTableSchema(db *sql.DB, serv string, acc telegraf.Accumulator) error { var ( dbList []string servtag string ) servtag, err := parseDSN(serv) if err != nil { servtag = "localhost" } // if the list of databases if empty, then get all databases if len(m.TableSchemaDatabases) == 0 { rows, err := db.Query(dbListQuery) if err != nil { return err } defer rows.Close() var database string for rows.Next() { err = rows.Scan(&database) if err != nil { return err } dbList = append(dbList, database) } } else { dbList = m.TableSchemaDatabases } for _, database := range dbList { rows, err := db.Query(fmt.Sprintf(tableSchemaQuery, database)) if err != nil { return err } defer rows.Close() var ( tableSchema string tableName string tableType string engine string version float64 rowFormat string tableRows float64 dataLength float64 indexLength float64 dataFree float64 createOptions string ) for rows.Next() { err = rows.Scan( &tableSchema, &tableName, &tableType, &engine, &version, &rowFormat, &tableRows, &dataLength, &indexLength, &dataFree, &createOptions, ) if err != nil { return err } tags := map[string]string{"server": servtag} tags["schema"] = tableSchema tags["table"] = tableName acc.Add(newNamespace("info_schema", "table_rows"), tableRows, tags) dlTags := copyTags(tags) dlTags["component"] = "data_length" acc.Add(newNamespace("info_schema", "table_size", "data_length"), dataLength, dlTags) ilTags := copyTags(tags) ilTags["component"] = "index_length" acc.Add(newNamespace("info_schema", "table_size", "index_length"), indexLength, ilTags) dfTags := copyTags(tags) dfTags["component"] = "data_free" acc.Add(newNamespace("info_schema", "table_size", "data_free"), dataFree, dfTags) versionTags := copyTags(tags) versionTags["type"] = tableType versionTags["engine"] = engine versionTags["row_format"] = rowFormat versionTags["create_options"] = createOptions acc.Add(newNamespace("info_schema", "table_version"), version, versionTags) } } return nil } // parseValue can be used to convert values such as "ON","OFF","Yes","No" to 0,1 func parseValue(value sql.RawBytes) (float64, bool) { if bytes.Compare(value, []byte("Yes")) == 0 || bytes.Compare(value, []byte("ON")) == 0 { return 1, true } if bytes.Compare(value, []byte("No")) == 0 || bytes.Compare(value, []byte("OFF")) == 0 { return 0, false } n, err := strconv.ParseFloat(string(value), 64) return n, err == nil } // findThreadState can be used to find thread state by command and plain state func findThreadState(rawCommand, rawState string) string { var ( // replace '_' symbol with space command = strings.Replace(strings.ToLower(rawCommand), "_", " ", -1) state = strings.Replace(strings.ToLower(rawState), "_", " ", -1) ) // if the state is already valid, then return it if _, ok := generalThreadStates[state]; ok { return state } // if state is plain, return the mapping if mappedState, ok := stateStatusMappings[state]; ok { return mappedState } // if the state is any lock, return the special state if strings.Contains(state, "waiting for") && strings.Contains(state, "lock") { return "waiting for lock" } if command == "sleep" && state == "" { return "idle" } if command == "query" { return "executing" } if command == "binlog dump" { return "replication master" } // if no mappings found and state is invalid, then return "other" state return "other" } // newNamespace can be used to make a namespace func newNamespace(words ...string) string { return strings.Replace(strings.Join(words, "_"), " ", "_", -1) } func copyTags(in map[string]string) map[string]string { out := make(map[string]string) for k, v := range in { out[k] = v } return out } func init() { inputs.Add("mysql", func() telegraf.Input { return &Mysql{} }) }