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Add innodb compression statistic (#275)

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* Add innodb commpression statistic
https://dev.mysql.com/doc/refman/5.5/en/innodb-cmp-table.html
https://dev.mysql.com/doc/refman/5.5/en/innodb-cmpmem-table.html

* Add innodb commpression statistic
https://dev.mysql.com/doc/refman/5.5/en/innodb-cmp-table.html
https://dev.mysql.com/doc/refman/5.5/en/innodb-cmpmem-table.html
This commit is contained in:
Vadim Yalovets
2018-04-23 16:39:29 +03:00
committed by Ben Kochie
parent 1645bb4d70
commit 170f6645e8
7 changed files with 275 additions and 0 deletions
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76
collector/info_schema_innodb_cmp.go Normal file
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// Scrape `information_schema.INNODB_CMP`.
package collector
import (
"database/sql"
"github.com/prometheus/client_golang/prometheus"
)
const innodbCmpQuery = `
SELECT
page_size, compress_ops, compress_ops_ok, compress_time, uncompress_ops, uncompress_time
FROM information_schema.innodb_cmp
`
var (
infoSchemaInnodbCmpCompressOps = prometheus.NewDesc(
prometheus.BuildFQName(namespace, informationSchema, "innodb_cmp_compress_ops_total"),
"Number of times a B-tree page of the size PAGE_SIZE has been compressed.",
[]string{"page_size"}, nil,
)
infoSchemaInnodbCmpCompressOpsOk = prometheus.NewDesc(
prometheus.BuildFQName(namespace, informationSchema, "innodb_cmp_compress_ops_ok_total"),
"Number of times a B-tree page of the size PAGE_SIZE has been successfully compressed.",
[]string{"page_size"}, nil,
)
infoSchemaInnodbCmpCompressTime = prometheus.NewDesc(
prometheus.BuildFQName(namespace, informationSchema, "innodb_cmp_compress_time_seconds_total"),
"Total time in seconds spent in attempts to compress B-tree pages.",
[]string{"page_size"}, nil,
)
infoSchemaInnodbCmpUncompressOps = prometheus.NewDesc(
prometheus.BuildFQName(namespace, informationSchema, "innodb_cmp_uncompress_ops_total"),
"Number of times a B-tree page of the size PAGE_SIZE has been uncompressed.",
[]string{"page_size"}, nil,
)
infoSchemaInnodbCmpUncompressTime = prometheus.NewDesc(
prometheus.BuildFQName(namespace, informationSchema, "innodb_cmp_uncompress_time_seconds_total"),
"Total time in seconds spent in uncompressing B-tree pages.",
[]string{"page_size"}, nil,
)
)
// ScrapeInnodbCmp collects from `information_schema.innodb_cmp`.
func ScrapeInnodbCmp(db *sql.DB, ch chan<- prometheus.Metric) error {
informationSchemaInnodbCmpRows, err := db.Query(innodbCmpQuery)
if err != nil {
return err
}
defer informationSchemaInnodbCmpRows.Close()
var (
page_size string
compress_ops, compress_ops_ok, compress_time, uncompress_ops, uncompress_time float64
)
for informationSchemaInnodbCmpRows.Next() {
if err := informationSchemaInnodbCmpRows.Scan(
&page_size, &compress_ops, &compress_ops_ok, &compress_time, &uncompress_ops, &uncompress_time,
); err != nil {
return err
}
ch <- prometheus.MustNewConstMetric(infoSchemaInnodbCmpCompressOps, prometheus.CounterValue, compress_ops, page_size)
ch <- prometheus.MustNewConstMetric(infoSchemaInnodbCmpCompressOpsOk, prometheus.CounterValue, compress_ops_ok, page_size)
ch <- prometheus.MustNewConstMetric(infoSchemaInnodbCmpCompressTime, prometheus.CounterValue, compress_time, page_size)
ch <- prometheus.MustNewConstMetric(infoSchemaInnodbCmpUncompressOps, prometheus.CounterValue, uncompress_ops, page_size)
ch <- prometheus.MustNewConstMetric(infoSchemaInnodbCmpUncompressTime, prometheus.CounterValue, uncompress_time, page_size)
}
return nil
}