max number connections exceeded

[smnorris]

When loading ~250 tables via ogr2pg, the loader bails at ~220 or so with:

ERROR 1: PQconnectdb failed.
FATAL:  sorry, too many clients already

in postgresql.conf, max_connections = 25

No luck reproducing this with a simple test (test_n_connections()). I'm not sure where the connection closing is being held up. Disabling the NullPool required for multiprocessing didn't help (137e8c9)

Setting max_connections = 50 eliminates the problem