Oracle Database Discussions

Hi everybody,

I have a process that executes four times per day, and in a specific execution the process consome most time. The quantites of data to be process in each moment is same.
Last day, I enabled trace to comper and I get the event gc cr disk read very difente from other execution.

Some one can explain what means the gc cr disk read event?

I have looking on the net but i found no documentation about it?

Thanks

Marcelo Barleta