--optimizer-disk-read-ratio

This page is part of MariaDB's Documentation.

The parent of this page is: mariadbd & mysqld for MariaDB Enterprise Server

Topics on this page:

• Overview

• USAGE

• DETAILS

  • SYNONYMS

  • SCHEMA

  • PARAMETERS

  • SKYSQL

  • PRIVILEGES

• EXAMPLES

• ERROR HANDLING

• FEATURE INTERACTION

• RESPONSES

• DIAGNOSIS

• ISO 9075:2016

• CHANGE HISTORY

• RELATED TOPICS

• EXTERNAL REFERENCES

Overview

This is a command-line option for the mariadbd & mysqld commands (arg: Required).

In 11.4 ES:

Chance that we have to do a disk read to find a row or index entry from the engine cache (cache_misses/total_cache_requests). 0.0 means that everything is cached and 1.0 means that nothing is expected to be in the engine cache.

In 10.6 ES, 10.6 CS, 10.5 ES, 10.5 CS, 10.4 ES, 10.4 CS, 10.3 ES, 10.3 CS, 10.2 ES, 10.2 CS:

Not present

See also: mariadbd & mysqld for MariaDB Enterprise Server 11.4, in 10.6 ES, in 10.5 ES, in 10.4 ES, in 10.3 ES, in 10.2 ES, in 10.6 CS, in 10.5 CS, in 10.4 CS, in 10.3 CS, and in 10.2 CS