JCFLBUFF

Tasks are made to wait on resource type JCFLBUFF after they have issued a request to CLOSE a journal, while the buffer is flushed (written to the journal). You can identify the journal for which the close request has been made from the final two characters of the resource name, FLUSH_nn ("nn" is the journal number, in the range 01 through 99).

You are likely to have an extended wait on this resource type only if an I/O problem arises. Check to see if any diagnostic messages have been issued to indicate that this has happened.