Class CreateHashIndexOptionSyntax

Inheritance
object
AbstractCreateIndexMethodOptionsSyntax
CreateHashIndexOptionSyntax
Implements
Inherited Members
Namespace: FluentMigrator.Builder.Create.Index
Assembly: FluentMigrator.Extensions.Postgres.dll
Syntax
public class CreateHashIndexOptionSyntax : AbstractCreateIndexMethodOptionsSyntax, ICreateHashIndexOptionSyntax, ICreateIndexMethodOptionsSyntax, ICreateIndexOptionsSyntax

Constructors

CreateHashIndexOptionSyntax(ICreateIndexOptionsSyntax)

Declaration
public CreateHashIndexOptionSyntax(ICreateIndexOptionsSyntax createIndexOptionsSyntax)
Parameters
Type Name Description
ICreateIndexOptionsSyntax createIndexOptionsSyntax

Methods

Fillfactor(int)

The fillfactor for an index is a percentage that determines how full the index method will try to pack index pages.

Declaration
public ICreateHashIndexOptionSyntax Fillfactor(int fillfactor)
Parameters
Type Name Description
int fillfactor

The fillfactor value from 10 to 100 can be selected
Returns
Type Description
ICreateHashIndexOptionSyntax

The next step
Remarks

For B-trees, leaf pages are filled to this percentage during initial index build, and also when extending the index at the right (adding new largest key values). If pages subsequently become completely full, they will be split, leading to gradual degradation in the index's efficiency. B-trees use a default fillfactor of 90, but any integer value from 10 to 100 can be selected. If the table is static then fillfactor 100 is best to minimize the index's physical size, but for heavily updated tables a smaller fillfactor is better to minimize the need for page splits. The other index methods use fillfactor in different but roughly analogous ways; the default fillfactor varies between methods.

Implements

Extension Methods