Slow Replicat

I have this particular REPLICAT that's 47 hours behind, and  8 gigs of logs to apply.  Any suggestions how I can speed this up, or what to check for?
GGSCI (sandbox) 4> info all

Program     Status      Group       Lag at Chkpt  Time Since Chkpt

MANAGER     RUNNING                                           
EXTRACT     RUNNING     ESBICGAD    00:00:00      00:00:00    
EXTRACT     RUNNING     ESBISDBX    00:00:00      00:00:08    
EXTRACT     RUNNING     ESUNSTSB    00:00:00      00:00:07    
EXTRACT     RUNNING     PSBICGAD    00:00:00      00:00:01    
EXTRACT     RUNNING     PSBISDBX    00:00:00      00:00:04    
EXTRACT     RUNNING     PSUNSTSB    00:00:00      00:00:01    
REPLICAT    RUNNING     RPUNCGAD    47:02:39      00:00:00    
REPLICAT    RUNNING     RSBICGAD    00:00:00      00:00:05    


GGSCI (sandbox) 5> info replicat RPUNCGAD

REPLICAT   RPUNCGAD  Last Started 2014-01-16 21:26   Status RUNNING
Checkpoint Lag       46:41:17 (updated 00:00:10 ago)
Log Read Checkpoint  File /cgdb/oggsb/dirdat/r1002398
                     2014-01-26 11:37:08.001119  RBA 455419544


GGSCI (sandbox) 6> sh ls -ltr /cgdb/oggsb/dirdat/r1*