Oracle Database Discussions

Hi,

I'm planning to use incremental backup with Block Change Tracking(BCT) enabled.
Well i see the good points of BCT like reducing network traffic and cpu cycles such that when RMAN checks for datafiles that has changed in block, it will use the BCT file instead of checking the datfile one by one.

Now it cannot yet implemented it because of this question?
"How is the performance hit of BCT?" If there is a block / blocks that are updated / changed, BCT will record it in the file, how much of the resources of the server will be used? Is it too much that it will cause slowness in daily transactions?"

Hope someone will help,

Jay