Help with connections

Guys i need some help.

Initially the connections to the database were 3 as seen using
netstat -a -n | grep "ESTAB" | grep <ip>
and ps -ef | grep postgres

After some time the connections suddenly incresed to 53 using the
above commands.

if i do
/usr/local/pgsql/bin/psql -d <database> -c "select
c.relname,d.datname,transaction,pid,mode,granted from pg_locks
l,pg_class c,pg_database d where l.relation=c.oid and
l.database=d.oid";

i get only
relname | datname | transaction | pid | mode
| granted
--------------------+----------------+-------------+-------+-----------------+---------
pg_class | rpt_production | | 25903 | AccessShareLock | t
pg_locks | rpt_production | | 25903 | AccessShareLock | t
pg_class_oid_index | rpt_production | | 25903 | AccessShareLock | t

That means there were no tables accessed at this particular time. But
why is the connections to database showing 53 ?.

The Applicatoin is closing the connections. After about 30 -40 secs
the connections drop to 4 or 5 agian.

Please advice the max number of conenctions are 100 in the conf file
.. how about increasing to 200 ?.

--
Best,
Gourish Singbal