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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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68
collector/info_schema_innodb_cmpmem.go Normal file
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// Scrape `information_schema.INNODB_CMPMEM`.
package collector
import (
"database/sql"
"github.com/prometheus/client_golang/prometheus"
)
const innodbCmpMemQuery = `
SELECT
page_size, buffer_pool_instance, pages_used, pages_free, relocation_ops, relocation_time
FROM information_schema.innodb_cmpmem
`
var (
infoSchemaInnodbCmpMemPagesRead = prometheus.NewDesc(
prometheus.BuildFQName(namespace, informationSchema, "innodb_cmpmem_pages_used_total"),
"Number of blocks of the size PAGE_SIZE that are currently in use.",
[]string{"page_size", "buffer_pool"}, nil,
)
infoSchemaInnodbCmpMemPagesFree = prometheus.NewDesc(
prometheus.BuildFQName(namespace, informationSchema, "innodb_cmpmem_pages_free_total"),
"Number of blocks of the size PAGE_SIZE that are currently available for allocation.",
[]string{"page_size", "buffer_pool"}, nil,
)
infoSchemaInnodbCmpMemRelocationOps = prometheus.NewDesc(
prometheus.BuildFQName(namespace, informationSchema, "innodb_cmpmem_relocation_ops_total"),
"Number of times a block of the size PAGE_SIZE has been relocated.",
[]string{"page_size", "buffer_pool"}, nil,
)
infoSchemaInnodbCmpMemRelocationTime = prometheus.NewDesc(
prometheus.BuildFQName(namespace, informationSchema, "innodb_cmpmem_relocation_time_seconds_total"),
"Total time in seconds spent in relocating blocks.",
[]string{"page_size", "buffer_pool"}, nil,
)
)
// ScrapeInnodbCmp collects from `information_schema.innodb_cmp`.
func ScrapeInnodbCmpMem(db *sql.DB, ch chan<- prometheus.Metric) error {
informationSchemaInnodbCmpMemRows, err := db.Query(innodbCmpMemQuery)
if err != nil {
return err
}
defer informationSchemaInnodbCmpMemRows.Close()
var (
page_size, buffer_pool string
pages_used, pages_free, relocation_ops, relocation_time float64
)
for informationSchemaInnodbCmpMemRows.Next() {
if err := informationSchemaInnodbCmpMemRows.Scan(
&page_size, &buffer_pool, &pages_used, &pages_free, &relocation_ops, &relocation_time,
); err != nil {
return err
}
ch <- prometheus.MustNewConstMetric(infoSchemaInnodbCmpMemPagesRead, prometheus.CounterValue, pages_used, page_size, buffer_pool)
ch <- prometheus.MustNewConstMetric(infoSchemaInnodbCmpMemPagesFree, prometheus.CounterValue, pages_free, page_size, buffer_pool)
ch <- prometheus.MustNewConstMetric(infoSchemaInnodbCmpMemRelocationOps, prometheus.CounterValue, relocation_ops, page_size, buffer_pool)
ch <- prometheus.MustNewConstMetric(infoSchemaInnodbCmpMemRelocationTime, prometheus.CounterValue, (relocation_time / 1000), page_size, buffer_pool)
}
return nil
}