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 tab 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
