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DBSizesAllowed

Specify possible database block sizes when creating a database.

Synopsis

[Startup]    DBSizesAllowed=n[n,n...]

n can be 8192, 16384, 32768, or 65536. The default value is 8192.

Description

DBSizesAllowed lists the database block sizes (in bytes) that you can select when creating a database.

For more information about creating and managing databases, see the Configuring Databases section of the “Configuring InterSystems IRIS” chapter in System Administration Guide.

Examples

DBSizesAllowed=8192,16384

DBSizesAllowed=8192,65536

Changing This Parameter

On the Startup page of the Management Portal (System Administration > Configuration > Additional Settings > Startup), in the DBSizesAllowed row, select Edit. Select each desired database block size. You cannot clear 8192.

Important:

When you enable an additional database block size, you must allocate memory for that block size using the globals parameter. This allows InterSystems IRIS® data platform to create the needed pool of global buffers for that size.

Instead of using the Management Portal, you can change DBSizesAllowed in the Config.StartupOpens in a new window class (as described in the class reference) or by editing the CPF in a text editor (as described in the Editing the Active CPF file section of the “Introduction to the Configuration Parameter File” chapter in this book).

See Also

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