Upgrading question (recycled transaction log)

Doing an upgrade from 7.3.6 to 7.4.2 and I keep seeing the recycled
transaction log about every 2 mins. For future upgrades, is there
something that can be set so that I don't have as many recycles? It seems
to slow down the importing of data.
Here's my current settings:

#---------------------------------------------------------------------------
# WRITE AHEAD LOG
#---------------------------------------------------------------------------

# - Settings -

#fsync = true # turns forced synchronization on or off
#wal_sync_method = fsync # the default varies across platforms:
# fsync, fdatasync, open_sync, or
open_datasync
wal_buffers = 32 # min 4, 8KB each

# - Checkpoints -

checkpoint_segments = 30 # in logfile segments, min 1, 16MB each
checkpoint_timeout = 600 # range 30-3600, in seconds
#checkpoint_warning = 30 # 0 is off, in seconds
#commit_delay = 0 # range 0-100000, in microseconds
#commit_siblings = 5 # range 1-1000

TIA
Patrick Hatcher