Try OpenEdge Now
skip to main content
Database Administration
Reference : Database Startup Parameters : Alphabetical listing of database startup parameters : Blocks in Database Buffers (-B)
 
Blocks in Database Buffers (-B)
Operating system and syntax
UNIX / Windows
-B n
Use with
Maximum value1
Minimum value
Single-user default
Multi-user default2
CC, DBS
1,000,000,000 or 125,000,000
10
20
Maximum of (8 * users) or 3000
1 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.

2 The users value is specified by the Number of Users (-n) parameter.

n
The number of blocks in the database buffers.
Use Blocks in Database Buffers (-B) to specify the number of blocks in the database buffers. The optimum value depends on your application. Validations to ensure database consistency in both index and data blocks during forward processing.using -B can be run online as part of routine health checks. For more information, see PROUTIL 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.