I notice there are frequent big gaps in time between  
"remoteHelperThread_1_1: allocate line buffers" "remoteWorkerThread_1: 
returning lines to pool". What is going on during this time?

2009-10-13 20:55:34 EDT DEBUG4 remoteWorkerThread_1: returning lines to pool
2009-10-13 20:55:34 EDT DEBUG4 remoteHelperThread_1_1: fetch from cursor
2009-10-13 20:55:34 EDT DEBUG4 remoteHelperThread_1_1: fetched 100 log rows
2009-10-13 20:55:34 EDT DEBUG4 remoteHelperThread_1_1: deliver 10 lines 
to worker
2009-10-13 20:55:34 EDT DEBUG4 remoteHelperThread_1_1: allocate line buffers
2009-10-13 20:55:37 EDT DEBUG4 remoteWorkerThread_1: returning lines to pool
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: fetch from cursor
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: fetched 100 log rows
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: deliver 10 lines 
to worker
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: allocate line buffers
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: fetch from cursor
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: fetched 100 log rows
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: deliver 10 lines 
to worker
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: allocate line buffers
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: fetch from cursor
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: fetched 100 log rows
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: deliver 10 lines 
to worker
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: allocate line buffers
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: fetch from cursor
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: fetched 100 log rows
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: deliver 10 lines 
to worker
2009-10-13 20:55:37 EDT DEBUG4 remoteHelperThread_1_1: allocate line buffers
2009-10-13 20:55:38 EDT DEBUG4 remoteWorkerThread_1: returning lines to pool
2009-10-13 20:55:38 EDT DEBUG4 remoteHelperThread_1_1: fetch from cursor
2009-10-13 20:55:38 EDT DEBUG4 remoteHelperThread_1_1: fetched 100 log rows
2009-10-13 20:55:38 EDT DEBUG4 remoteHelperThread_1_1: deliver 10 lines 
to worker
2009-10-13 20:55:38 EDT DEBUG4 remoteHelperThread_1_1: allocate line buffers
2009-10-13 20:55:47 EDT DEBUG4 remoteWorkerThread_1: returning lines to pool
2009-10-13 20:55:47 EDT DEBUG4 remoteHelperThread_1_1: fetch from cursor
2009-10-13 20:55:47 EDT DEBUG4 remoteHelperThread_1_1: fetched 100 log rows
2009-10-13 20:55:47 EDT DEBUG4 remoteHelperThread_1_1: deliver 10 lines 
to worker
2009-10-13 20:55:47 EDT DEBUG4 remoteHelperThread_1_1: allocate line buffers
2009-10-13 20:55:47 EDT DEBUG4 remoteHelperThread_1_1: fetch from cursor
2009-10-13 20:55:47 EDT DEBUG4 remoteHelperThread_1_1: fetched 100 log rows
2009-10-13 20:55:47 EDT DEBUG4 remoteHelperThread_1_1: deliver 10 lines 
to worker
2009-10-13 20:55:47 EDT DEBUG4 remoteHelperThread_1_1: allocate line buffers
2009-10-13 20:55:47 EDT DEBUG4 remoteHelperThread_1_1: fetch from cursor