/
perf_schema_table_io_waits.go
108 lines (96 loc) · 3.65 KB
/
perf_schema_table_io_waits.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
// Scrape `performance_schema.table_io_waits_summary_by_table`.
package collector
import (
"context"
"database/sql"
"github.com/prometheus/client_golang/prometheus"
)
const 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')
`
// Metric descriptors.
var (
performanceSchemaTableWaitsDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "table_io_waits_total"),
"The total number of table I/O wait events for each table and operation.",
[]string{"schema", "name", "operation"}, nil,
)
performanceSchemaTableWaitsTimeDesc = prometheus.NewDesc(
prometheus.BuildFQName(namespace, performanceSchema, "table_io_waits_seconds_total"),
"The total time of table I/O wait events for each table and operation.",
[]string{"schema", "name", "operation"}, nil,
)
)
// ScrapePerfTableIOWaits collects from `performance_schema.table_io_waits_summary_by_table`.
type ScrapePerfTableIOWaits struct{}
// Name of the Scraper.
func (ScrapePerfTableIOWaits) Name() string {
return "perf_schema.tableiowaits"
}
// Help returns additional information about Scraper.
func (ScrapePerfTableIOWaits) Help() string {
return "Collect metrics from performance_schema.table_io_waits_summary_by_table"
}
// Version of MySQL from which scraper is available.
func (ScrapePerfTableIOWaits) Version() float64 {
return 5.6
}
// Scrape collects data.
func (ScrapePerfTableIOWaits) Scrape(ctx context.Context, db *sql.DB, ch chan<- prometheus.Metric) error {
perfSchemaTableWaitsRows, err := db.QueryContext(ctx, perfTableIOWaitsQuery)
if err != nil {
return err
}
defer perfSchemaTableWaitsRows.Close()
var (
objectSchema, objectName string
countFetch, countInsert, countUpdate, countDelete uint64
timeFetch, timeInsert, timeUpdate, timeDelete uint64
)
for perfSchemaTableWaitsRows.Next() {
if err := perfSchemaTableWaitsRows.Scan(
&objectSchema, &objectName, &countFetch, &countInsert, &countUpdate, &countDelete,
&timeFetch, &timeInsert, &timeUpdate, &timeDelete,
); err != nil {
return err
}
ch <- prometheus.MustNewConstMetric(
performanceSchemaTableWaitsDesc, prometheus.CounterValue, float64(countFetch),
objectSchema, objectName, "fetch",
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaTableWaitsDesc, prometheus.CounterValue, float64(countInsert),
objectSchema, objectName, "insert",
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaTableWaitsDesc, prometheus.CounterValue, float64(countUpdate),
objectSchema, objectName, "update",
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaTableWaitsDesc, prometheus.CounterValue, float64(countDelete),
objectSchema, objectName, "delete",
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaTableWaitsTimeDesc, prometheus.CounterValue, float64(timeFetch)/picoSeconds,
objectSchema, objectName, "fetch",
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaTableWaitsTimeDesc, prometheus.CounterValue, float64(timeInsert)/picoSeconds,
objectSchema, objectName, "insert",
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaTableWaitsTimeDesc, prometheus.CounterValue, float64(timeUpdate)/picoSeconds,
objectSchema, objectName, "update",
)
ch <- prometheus.MustNewConstMetric(
performanceSchemaTableWaitsTimeDesc, prometheus.CounterValue, float64(timeDelete)/picoSeconds,
objectSchema, objectName, "delete",
)
}
return nil
}