In this example, a global buffer (gbuf01) is added, and an RDAREA (RDAREA1) added for that global buffer is assigned.

 
pdbufmod -k add -a gbuf01 -r RDAREA1 -n 1000
 

Explanation

-k add: Specifies addition of a global buffer.

-a: Specifies a name for the global buffer being added.

-r: Specifies an RDAREA to assign.

-n: Specifies the number of buffer sectors for the global buffer.

In this example, a global buffer (gbuf02) is added. At the same time, the global buffer to which an RDAREA (RDAREA1) is assigned (the RDAREA global buffer assignment) is changed from gbuf01 to gbuf02.

 
pdbufmod -k add -a gbuf02 -r RDAREA1 -n 1000
 

Explanation

-k add: Specifies addition of a global buffer.

-a: Specifies a name for the global buffer to be added.

-r: Specifies an RDAREA to assign.

-n: Specifies the number of buffer sectors for the global buffer.

In this example, an added RDAREA (RDAREA1) is assigned to an existing global buffer (gbuf01).

 
pdbufmod -k add -a gbuf01 -r RDAREA1
 

Explanation

-k add: Specifies assignment of an RDAREA to an existing global buffer.

-a: Specifies the name of the target global buffer.

-r: Specifies the RDAREA to be assigned.

In this example, the global buffer assignment of an RDAREA (RDAREA1) is changed from gbuf01 to gbuf02. Both gbuf01 and gbuf02 are existing global buffers.

 
pdbufmod -k add -a gbuf02 -r RDAREA1
 

Explanation

-k add: Specifies assignment of an RDAREA to an existing global buffer.

-a: Specifies the name of the target global buffer.

-r: Specifies the RDAREA to be assigned.

In this example, a global buffer (gbuf01) to which no RDAREA is assigned is deleted.

 
pdbufmod -k del -a gbuf01
 

Explanation

-k del: Specifies deletion of a global buffer.

-a: Specifies the name of the global buffer to be deleted.

In this example, a global buffer (gbuf01) to which an RDAREA (RDAREA1) is assigned is deleted.

 
pdhold -r RDAREA1 -c                              1
pdbufmod -k del -a gbuf01                         2
 

Explanation

1. The RDAREA is placed in shutdown status. If gbuf01 is an index global buffer, the index storage RDAREA is placed in shutdown status. If the inner replica facility is being used, index storage RDAREAs of all generations are placed in shutdown status.
2. The global buffer is deleted.

In this example, an RDAREA (RDAREA1) is separated from a global buffer (gbuf01).

 
pdhold -r RDAREA1 -c                              1
pdbufmod -k del -r RDAREA1                        2
 

Explanation

1. The RDAREA is placed in shutdown status.
2. The RDAREA is separated from the global buffer.

In this example, the number of buffer sectors comprising a global buffer (gbuf01) is changed from 1,000 to 2,000.

 
pdbufmod -k upd -a gbuf01 -n 2000
 

Explanation

-k upd: Specifies a change in a global buffer definition.

-a: Specifies the name of the global buffer whose definition is to be changed.

-n: Specifies the number of buffer sectors after the change.

The pdbufmod command can be used to change the following items:

• Number of buffer sectors
• Buffer size
• Maximum number of concurrently executing prefetch processes
• Maximum number of concurrent input pages
• Updated input page rate during deferred write trigger