The BIW improves database performance by performing before-image overhead operations in the background. For more information on the BIW, see
Managing Performance.
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The BIW process counts as one user. You might have to increment the value of the Number of Users (
-n) parameter to allow for the BIW. However, the BIW does not count as a licensed user.
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You can increase the number of before-image buffers with the Before-image Buffers (
-bibufs) parameter. Increasing the number of buffers increases the availability of empty buffers to client and server processes.