Before-image Buffers (-bibufs)

Operating system and syntax UNIX / Windows 

                  -bibufs n
Use with Maximum value Minimum value Single-user default Multi-user default
DBS – 3 – 64
n
The number of before-image buffers.

Use Before-image Buffers (-bibufs) to specify the number of before-image buffers. This parameter is useful only when running the before-image writer (BIW). The BIW continually writes the filled before-image buffers to disk, making the buffers available to other client and server processes. Without a BIW writing the buffers, any gain from increasing the number of buffers is negligible.

Note: Validations using -bibufs can be run online as part of routine health checks. For more information, see PROUTIL Utility.

To modify this parameter while the database is online, use PROUTIL INCREASETO.

You can use this parameter to support continuous operation of the database. For more information, see Change database parameters while the database is running.