/
perf_schema_events_statements.go
235 lines (223 loc) · 8.87 KB
/
perf_schema_events_statements.go
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// Scrape `performance_schema.events_statements_summary_by_digest`.
package collector
import (
"context"
"database/sql"
"fmt"
"github.com/prometheus/client_golang/prometheus"
"gopkg.in/alecthomas/kingpin.v2"
)
const 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 (
SELECT *
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 LAST_SEEN DESC
)Q
GROUP BY
Q.SCHEMA_NAME,
Q.DIGEST,
Q.DIGEST_TEXT,
Q.COUNT_STAR,
Q.SUM_TIMER_WAIT,
Q.SUM_ERRORS,
Q.SUM_WARNINGS,
Q.SUM_ROWS_AFFECTED,
Q.SUM_ROWS_SENT,
Q.SUM_ROWS_EXAMINED,
Q.SUM_CREATED_TMP_DISK_TABLES,
Q.SUM_CREATED_TMP_TABLES,
Q.SUM_SORT_MERGE_PASSES,
Q.SUM_SORT_ROWS,
Q.SUM_NO_INDEX_USED
ORDER BY SUM_TIMER_WAIT DESC
LIMIT %d
`
// Tuning flags.
var (
perfEventsStatementsLimit = kingpin.Flag(
"collect.perf_schema.eventsstatements.limit",
"Limit the number of events statements digests by response time",
).Default("250").Int()
perfEventsStatementsTimeLimit = kingpin.Flag(
"collect.perf_schema.eventsstatements.timelimit",
"Limit how old the 'last_seen' events statements can be, in seconds",
).Default("86400").Int()
perfEventsStatementsDigestTextLimit = kingpin.Flag(
"collect.perf_schema.eventsstatements.digest_text_limit",
"Maximum length of the normalized statement text",
).Default("120").Int()
)
// Metric descriptors.
var (
performanceSchemaEventsStatementsDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_total"),
"The total count of events statements by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
performanceSchemaEventsStatementsTimeDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_seconds_total"),
"The total time of events statements by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
performanceSchemaEventsStatementsErrorsDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_errors_total"),
"The errors of events statements by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
performanceSchemaEventsStatementsWarningsDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_warnings_total"),
"The warnings of events statements by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
performanceSchemaEventsStatementsRowsAffectedDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_rows_affected_total"),
"The total rows affected of events statements by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
performanceSchemaEventsStatementsRowsSentDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_rows_sent_total"),
"The total rows sent of events statements by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
performanceSchemaEventsStatementsRowsExaminedDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_rows_examined_total"),
"The total rows examined of events statements by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
performanceSchemaEventsStatementsTmpTablesDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_tmp_tables_total"),
"The total tmp tables of events statements by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
performanceSchemaEventsStatementsTmpDiskTablesDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_tmp_disk_tables_total"),
"The total tmp disk tables of events statements by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
performanceSchemaEventsStatementsSortMergePassesDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_sort_merge_passes_total"),
"The total number of merge passes by the sort algorithm performed by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
performanceSchemaEventsStatementsSortRowsDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_sort_rows_total"),
"The total number of sorted rows by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
performanceSchemaEventsStatementsNoIndexUsedDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "events_statements_no_index_used_total"),
"The total number of statements that used full table scans by digest.",
[]string{"schema", "digest", "digest_text"}, nil,
)
)
// ScrapePerfEventsStatements collects from `performance_schema.events_statements_summary_by_digest`.
type ScrapePerfEventsStatements struct{}
// Name of the Scraper.
func (ScrapePerfEventsStatements) Name() string {
return "perf_schema.eventsstatements"
}
// Help returns additional information about Scraper.
func (ScrapePerfEventsStatements) Help() string {
return "Collect metrics from performance_schema.events_statements_summary_by_digest"
}
// Version of MySQL from which scraper is available.
func (ScrapePerfEventsStatements) Version() float64 {
return 5.6
}
// Scrape collects data.
func (ScrapePerfEventsStatements) Scrape(ctx context.Context, db *sql.DB, ch chan<- prometheus.Metric) error {
perfQuery := fmt.Sprintf(
perfEventsStatementsQuery,
*perfEventsStatementsDigestTextLimit,
*perfEventsStatementsTimeLimit,
*perfEventsStatementsLimit,
)
// Timers here are returned in picoseconds.
perfSchemaEventsStatementsRows, err := db.QueryContext(ctx, perfQuery)
if err != nil {
return err
}
defer perfSchemaEventsStatementsRows.Close()
var (
schemaName, digest, digestText string
count, queryTime, errors, warnings uint64
rowsAffected, rowsSent, rowsExamined uint64
tmpTables, tmpDiskTables uint64
sortMergePasses, sortRows uint64
noIndexUsed uint64
)
for perfSchemaEventsStatementsRows.Next() {
if err := perfSchemaEventsStatementsRows.Scan(
&schemaName, &digest, &digestText, &count, &queryTime, &errors, &warnings, &rowsAffected, &rowsSent, &rowsExamined, &tmpTables, &tmpDiskTables, &sortMergePasses, &sortRows, &noIndexUsed,
); err != nil {
return err
}
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsDesc, prometheus.CounterValue, float64(count),
schemaName, digest, digestText,
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsTimeDesc, prometheus.CounterValue, float64(queryTime)/picoSeconds,
schemaName, digest, digestText,
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsErrorsDesc, prometheus.CounterValue, float64(errors),
schemaName, digest, digestText,
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsWarningsDesc, prometheus.CounterValue, float64(warnings),
schemaName, digest, digestText,
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsRowsAffectedDesc, prometheus.CounterValue, float64(rowsAffected),
schemaName, digest, digestText,
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsRowsSentDesc, prometheus.CounterValue, float64(rowsSent),
schemaName, digest, digestText,
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsRowsExaminedDesc, prometheus.CounterValue, float64(rowsExamined),
schemaName, digest, digestText,
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsTmpTablesDesc, prometheus.CounterValue, float64(tmpTables),
schemaName, digest, digestText,
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsTmpDiskTablesDesc, prometheus.CounterValue, float64(tmpDiskTables),
schemaName, digest, digestText,
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsSortMergePassesDesc, prometheus.CounterValue, float64(sortMergePasses),
schemaName, digest, digestText,
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsSortRowsDesc, prometheus.CounterValue, float64(sortRows),
schemaName, digest, digestText,
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaEventsStatementsNoIndexUsedDesc, prometheus.CounterValue, float64(noIndexUsed),
schemaName, digest, digestText,
)
}
return nil
}