optimizer_disk_read_ratio

Overview

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

In 10.6 ES, 10.5 ES, 10.4 ES:

Not present

See also: System Variables 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

See also: System Variables for MariaDB Enterprise Server 11.4, in 10.6 ES, in 10.5 ES, and in 10.4 ES

USAGE

DETAILS

SYNONYMS

SCHEMA

PARAMETERS

Command-line

--optimizer_disk_read_ratio=#

Configuration file

Supported

Dynamic

Yes

Scope

Global

Data Type

DOUBLE

Minimum Value

0

Maximum Value

1

Product Default Value

0.020000

SKYSQL

Cloud

SkySQL Topology

ES Ver

Service Default

AWS

Multi-Node Analytics

10.6

Not present

Single Node Analytics

10.6

Not present

Replicated Transactions

10.4

Not present

10.5

Not present

10.6

Not present

Single Node Transactions

10.4

Not present

10.5

Not present

10.6

Not present

GCP

Multi-Node Analytics

10.6

Not present

Single Node Analytics

10.6

Not present

Replicated Transactions

10.4

Not present

10.5

Not present

10.6

Not present

Single Node Transactions

10.4

Not present

10.5

Not present

10.6

Not present

Cloud

SkySQL Topology

ES Ver

Service Default

AWS

ColumnStore Data Warehouse

10.6

Not present

Enterprise Server With Replica(s)

10.4

Not present

10.5

Not present

10.6

Not present

Enterprise Server Single Node

10.4

Not present

10.5

Not present

10.6

Not present

GCP

ColumnStore Data Warehouse

10.6

Not present

Enterprise Server With Replica(s)

10.4

Not present

10.5

Not present

10.6

Not present

Enterprise Server Single Node

10.4

Not present

10.5

Not present

10.6

Not present

PRIVILEGES

EXAMPLES

ERROR HANDLING

FEATURE INTERACTION

RESPONSES

DIAGNOSIS

ISO 9075:2016

CHANGE HISTORY

Release Series

History

11.4 Enterprise

  • Present starting in MariaDB Enterprise Server 11.4.3-1.

10.6 Enterprise

  • Not present.

10.6 Community

  • Not present.

10.5 Enterprise

  • Not present.

10.5 Community

  • Not present.

10.4 Enterprise

  • Not present.

10.4 Community

  • Not present.

10.3 Enterprise

  • Not present.

10.3 Community

  • Not present.

10.2 Enterprise

  • Not present.

10.2 Community

  • Not present.

Release Series

History

11.4 Enterprise

  • Present starting in MariaDB Enterprise Server 11.4.3-1.

10.6 Enterprise

  • Not present.

10.5 Enterprise

  • Not present.

10.4 Enterprise

  • Not present.

EXTERNAL REFERENCES