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Startup Command and Parameter Reference
Startup Parameter Descriptions : Blocks in Database Buffers (-B)
 

Blocks in Database Buffers (-B)

Use Blocks in Database Buffers (-B) to specify the number of blocks in the database buffers. The optimum value depends on your application.
Operating system and syntax
UNIX / Windows
-B n
Use with
Maximum value
Minimum value
Single-user default
Multi-user default1
Client Connection, Database Server
1,000,000,000 or 125,000,0002
10
20
Maximum value of 3000 or 8 * users, whichever is higher
1 The users value is specified by the Number of Users (-n) parameter.

2 The maximum value of the sum of -B + -B2: 1,000,000,000 for 64-bit platforms; 125,000,000 for 32-bit platforms. The maximum is system dependent and limited by available memory.

n
The number of blocks in the database buffers.
Blocks in Database Buffers (-B) can be changed while the database is online with the PROUTIL INCREASETO utility.
Note: On the AIX platform, when starting a database with large shared memory requirements (for instance, when the -B exceeds the allotted system paging space), the system may become unstable if the PSALLOC=early environment variable is not set. For more information, see OpenEdge Getting Started: Installation and Configuration.
Note: Release 10.1C and forward, the OpenEdge RDBMS expands the range of internal validations used to ensure database consistency in both index and data blocks during forward processing. Validations using PROUTIL can be run online as part of routine health checks. For more information, see OpenEdge Data Management: Database Administration.