Release 10.1A: OpenEdge Data Management:
Database Administration

> ## PROBIW command

> Starts a before-image writer (BIW) process.

> #### Syntax

>     probiw db-name

> #### Parameters

> ``db-name``

> Specifies the database where you want to start a BIW.

> The BIW improves database performance by performing before-image overhead operations in the background. For more information on the BIW, see Chapter 13, " Managing Performance."

> #### Notes

> - To stop the BIW process, disconnect it by using the PROSHUT command. You can start and stop the BIW at any time without shutting down the database.

> - 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.

> - 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.

> - Before-image writers are only available on Enterprise systems.

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