Managing buffer pools - Amazon Relational Database Service
rdsadmin.create_bufferpoolrdsadmin.alter_bufferpoolrdsadmin.drop_bufferpool
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Managing buffer pools

The following stored procedures manage buffer pools for Amazon RDS for Db2 databases. To run these procedures, the master user must first connect to the rdsadmin database.

rdsadmin.create_bufferpool

Creates a buffer pool.

Syntax

db2 "call rdsadmin.create_bufferpool(
    'database_name', 
    'buffer_pool_name', 
    buffer_pool_size, 
    'immediate', 
    'automatic', 
    page_size, 
    number_block_pages, 
    block_size)"

Parameters

The following parameters are required:

database_name

The name of the database to run the command on. The data type is varchar.

buffer_pool_name

The name of the buffer pool to create. The data type is varchar.

The following parameters are optional:

buffer_pool_size

The size of the buffer pool in number of pages. The data type is integer. The default is -1.

immediate

Specifies whether the command runs immediately. The data type is char. The default is Y.

automatic

Specifies whether to set the buffer pool to automatic. The data type is char. The default is Y.

page_size

The page size of the buffer pool. The data type is integer. Valid values: 4096, 8192, 16384, 32768. The default is 8192.

number_block_pages

The number of block pages in the buffer pools. The data type is integer. The default is 0.

block_size

The block size for the block pages. The data type is integer. Valid values: 2 to 256. The default is 32.

Usage notes

For information about checking the status of creating a buffer pool, see rdsadmin.get_task_status.

Examples

The following example creates a buffer pool called BP8 for a database called TESTDB with default parameters, so the buffer pool uses an 8 KB page size. 

db2 "call rdsadmin.create_bufferpool(
    'TESTDB', 
    BP8')"

The following example creates a buffer pool called BP16 for a database called TESTDB that uses a 16 KB page size with an initial page count of 1,000 and is set to automatic. Db2 runs the command immediately. If you use an initial page count of -1, then Db2 will use automatic allocation of pages.

db2 "call rdsadmin.create_bufferpool(
    'TESTDB', 
    'BP16', 
    1000, 
    'Y', 
    'Y', 
    16384)"

The following example creates a buffer pool called BP16 for a database called TESTDB. This buffer pool has a 16 KB page size with an initial page count of 10,000. Db2 runs the command immediately using 500 block pages with a block size of 512.

db2 "call rdsadmin.create_bufferpool(
    'TESTDB', 
    'BP16',
    10000, 
    'Y', 
    'Y', 
    16384, 
    500, 
    512)"

rdsadmin.alter_bufferpool

Alters a buffer pool.

Syntax

db2 "call rdsadmin.alter_bufferpool(
    'database_name', 
    'buffer_pool_name', 
    buffer_pool_size, 
    'immediate', 
    'automatic', 
    change_number_blocks, 
    number_block_pages, 
    block_size)"

Parameters

The following parameters are required:

database_name

The name of the database to run the command on. The data type is varchar.

buffer_pool_name

The name of the buffer pool to alter. The data type is varchar.

buffer_pool_size

The size of the buffer pool in number of pages. The data type is integer.

The following parameters are optional:

immediate

Specifies whether the command runs immediately. The data type is char. The default is Y.

automatic

Specifies whether to set the buffer pool to automatic. The data type is char. The default is N.

change_number_blocks

Specifies whether there is a change to the number of block pages in the buffer pool. The data type is char. The default is N.

number_block_pages

The number of block pages in the buffer pools. The data type is integer. The default is 0.

block_size

The block size for the block pages. The data type is integer. Valid values: 2 to 256. The default is 32.

Usage notes

For information about checking the status of altering a buffer pool, see rdsadmin.get_task_status.

Examples

The following example alters a buffer pool called BP16 for a database called TESTDB to non-automatic, and changes the size to 10,000 pages. Db2 runs this command immediately. 

db2 "call rdsadmin.alter_bufferpool(
    'TESTDB',
    'BP16', 
    10000, 
    'Y', 
    'N')"

rdsadmin.drop_bufferpool

Drops a buffer pool.

Syntax

db2 "call rdsadmin.drop_bufferpool(
    'database_name', 
    'buffer_pool_name'"

Parameters

The following parameters are required:

database_name

The name of the database that the buffer pool belongs to. The data type is varchar.

buffer_pool_name

The name of the buffer pool to drop. The data type is varchar.

Usage notes

For information about checking the status of dropping a buffer pool, see rdsadmin.get_task_status.

Examples

The following example drops a buffer pool called BP16 for a database called TESTDB.

db2 "call rdsadmin.drop_bufferpool(
    'TESTDB',
    'BP16')"