I run 100 user on OpenERP, I have some error message.....

would you please kindly help me, Thank you....

1、
2014-01-05 15:49:14,305 7295 ERROR ? openerp.netsvc: FATAL:  sorry, too many clients already
Traceback (most recent call last):
  File "/home/landy/openerp-7.0-20131121-002445/openerp/netsvc.py", line 292, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)

  File "/home/landy/openerp-7.0-20131121-002445/openerp/service/web_services.py", line 122, in dispatch
    return fn(*params)

  File "/home/landy/openerp-7.0-20131121-002445/openerp/service/web_services.py", line 359, in exp_list
    cr = db.cursor()

  File "/home/landy/openerp-7.0-20131121-002445/openerp/sql_db.py", line 484, in cursor
    return Cursor(self._pool, self.dbname, serialized=serialized)

  File "/home/landy/openerp-7.0-20131121-002445/openerp/sql_db.py", line 182, in __init__
    self._cnx = pool.borrow(dsn(dbname))

  File "/home/landy/openerp-7.0-20131121-002445/openerp/sql_db.py", line 377, in _locked
    return fun(self, *args, **kwargs)

  File "/home/landy/openerp-7.0-20131121-002445/openerp/sql_db.py", line 440, in borrow
    result = psycopg2.connect(dsn=dsn, connection_factory=PsycoConnection)

  File "/usr/lib/python2.7/dist-packages/psycopg2/__init__.py", line 179, in connect
    connection_factory=connection_factory, async=async)

OperationalError: FATAL:  sorry, too many clients already



2、
2013-12-23 08:43:51,600 2347 ERROR ? openerp.netsvc: The Connection Pool Is Full
Traceback (most recent call last):

  File "/home/landy/openerp-7.0-20131121-002445/openerp/netsvc.py", line 292, in dispatch_rpc
    result = ExportService.getService(service_name).dispatch(method, params)

  File "/home/landy/openerp-7.0-20131121-002445/openerp/service/web_services.py", line 122, in dispatch
    return fn(*params)

  File "/home/landy/openerp-7.0-20131121-002445/openerp/service/web_services.py", line 359, in exp_list
    cr = db.cursor()

  File "/home/landy/openerp-7.0-20131121-002445/openerp/sql_db.py", line 484, in cursor
    return Cursor(self._pool, self.dbname, serialized=serialized)

  File "/home/landy/openerp-7.0-20131121-002445/openerp/sql_db.py", line 182, in __init__
    self._cnx = pool.borrow(dsn(dbname))

  File "/home/landy/openerp-7.0-20131121-002445/openerp/sql_db.py", line 377, in _locked
    return fun(self, *args, **kwargs)

  File "/home/landy/openerp-7.0-20131121-002445/openerp/sql_db.py", line 437, in borrow
    raise PoolError('The Connection Pool Is Full')

PoolError: The Connection Pool Is Full