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mysql.go
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package mysql
import (
"bytes"
"database/sql"
"fmt"
"log"
"strconv"
"strings"
"sync"
"time"
"github.com/influxdata/telegraf"
"github.com/influxdata/telegraf/plugins/inputs"
"github.com/go-sql-driver/mysql"
)
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"`
GatherUserStatistics bool `toml:"gather_user_statistics"`
GatherInfoSchemaAutoInc bool `toml:"gather_info_schema_auto_inc"`
GatherInnoDBMetrics bool `toml:"gather_innodb_metrics"`
GatherSlaveStatus bool `toml:"gather_slave_status"`
GatherBinaryLogs bool `toml:"gather_binary_logs"`
GatherTableIOWaits bool `toml:"gather_table_io_waits"`
GatherTableLockWaits bool `toml:"gather_table_lock_waits"`
GatherIndexIOWaits bool `toml:"gather_index_io_waits"`
GatherEventWaits bool `toml:"gather_event_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.
## 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 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 thread state counts from INFORMATION_SCHEMA.USER_STATISTICS
gather_user_statistics = true
#
## gather auto_increment columns and max values from information schema
gather_info_schema_auto_inc = true
#
## gather metrics from INFORMATION_SCHEMA.INNODB_METRICS
gather_innodb_metrics = 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"
`
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 {
// default to localhost if nothing specified.
return m.gatherServer(localhost, acc)
}
// Initialise additional query intervals
if !initDone {
m.InitMysql()
}
var wg sync.WaitGroup
// Loop through each server and collect metrics
for _, server := range m.Servers {
wg.Add(1)
go func(s string) {
defer wg.Done()
acc.AddError(m.gatherServer(s, acc))
}(server)
}
wg.Wait()
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_",
},
{
onServer: "wsrep_",
inExport: "wsrep_",
},
{
onServer: "Uptime_",
inExport: "uptime_",
},
}
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",
}
)
// 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`
infoSchemaUserStatisticsQuery = `
SELECT *,count(*)
FROM information_schema.user_statistics
GROUP BY user`
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
`
innoDBMetricsQuery = `
SELECT NAME, COUNT
FROM information_schema.INNODB_METRICS
WHERE status='enabled'
`
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_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_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.GatherUserStatistics {
err = m.GatherUserStatisticsStatuses(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.GatherInnoDBMetrics {
err = m.gatherInnoDBMetrics(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
}
}
if m.GatherTableLockWaits {
err = m.gatherPerfTableLockWaits(db, serv, acc)
if err != nil {
return err
}
}
if m.GatherEventWaits {
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 := getDSNTag(serv)
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 mysql version and put into field and tag
if strings.Contains(key, "version") {
fields[key] = string(val)
tags[key] = string(val)
}
// 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 := getDSNTag(serv)
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
servtag := getDSNTag(serv)
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
servtag := getDSNTag(serv)
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 {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", name, err))
} else {
fields["queries"] = i
}
case "Questions":
i, err := strconv.ParseInt(string(val.([]byte)), 10, 64)
if err != nil {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", name, err))
} else {
fields["questions"] = i
}
case "Slow_queries":
i, err := strconv.ParseInt(string(val.([]byte)), 10, 64)
if err != nil {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", name, err))
} else {
fields["slow_queries"] = i
}
case "Connections":
i, err := strconv.ParseInt(string(val.([]byte)), 10, 64)
if err != nil {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", name, err))
} else {
fields["connections"] = i
}
case "Syncs":
i, err := strconv.ParseInt(string(val.([]byte)), 10, 64)
if err != nil {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", name, err))
} else {
fields["syncs"] = i
}
case "Uptime":
i, err := strconv.ParseInt(string(val.([]byte)), 10, 64)
if err != nil {
acc.AddError(fmt.Errorf("E! Error mysql: parsing %s int value (%s)", name, err))
} else {
fields["uptime"] = 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")
if err != nil {
log.Printf("E! MySQL Error gathering process list: %s", err)
} else {
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)
}
}
}
// gather connection metrics from user_statistics for each user
if m.GatherUserStatistics {
conn_rows, err := db.Query("select user, total_connections, concurrent_connections, connected_time, busy_time, cpu_time, bytes_received, bytes_sent, binlog_bytes_written, rows_fetched, rows_updated, table_rows_read, select_commands, update_commands, other_commands, commit_transactions, rollback_transactions, denied_connections, lost_connections, access_denied, empty_queries, total_ssl_connections FROM INFORMATION_SCHEMA.USER_STATISTICS GROUP BY user")
if err != nil {
log.Printf("E! MySQL Error gathering user stats: %s", err)
} else {
for conn_rows.Next() {
var user string
var total_connections int64
var concurrent_connections int64
var connected_time int64
var busy_time int64
var cpu_time int64
var bytes_received int64
var bytes_sent int64
var binlog_bytes_written int64
var rows_fetched int64
var rows_updated int64
var table_rows_read int64
var select_commands int64
var update_commands int64
var other_commands int64
var commit_transactions int64
var rollback_transactions int64
var denied_connections int64
var lost_connections int64
var access_denied int64
var empty_queries int64
var total_ssl_connections int64
err = conn_rows.Scan(&user, &total_connections, &concurrent_connections,
&connected_time, &busy_time, &cpu_time, &bytes_received, &bytes_sent, &binlog_bytes_written,
&rows_fetched, &rows_updated, &table_rows_read, &select_commands, &update_commands, &other_commands,
&commit_transactions, &rollback_transactions, &denied_connections, &lost_connections, &access_denied,
&empty_queries, &total_ssl_connections,
)
if err != nil {
return err
}
tags := map[string]string{"server": servtag, "user": user}
fields := map[string]interface{}{
"total_connections": total_connections,
"concurrent_connections": concurrent_connections,
"connected_time": connected_time,
"busy_time": busy_time,
"cpu_time": cpu_time,
"bytes_received": bytes_received,
"bytes_sent": bytes_sent,
"binlog_bytes_written": binlog_bytes_written,
"rows_fetched": rows_fetched,
"rows_updated": rows_updated,
"table_rows_read": table_rows_read,
"select_commands": select_commands,
"update_commands": update_commands,
"other_commands": other_commands,
"commit_transactions": commit_transactions,
"rollback_transactions": rollback_transactions,
"denied_connections": denied_connections,
"lost_connections": lost_connections,
"access_denied": access_denied,
"empty_queries": empty_queries,
"total_ssl_connections": total_ssl_connections,
}
acc.AddFields("mysql_user_stats", fields, tags)
}