oracle8i的数据库连接问题

mol008

请大侠援手，谢谢！
问题：proc中连oracle8i的数据库，如果多个进程同时并发连会发现速度下降的比较厉害
如：
EVENT: connect to database ok: 1.690255
EVENT: connect to database ok: 1.627003
EVENT: connect to database ok: 4.796632
EVENT: connect to database ok: 1.811054
EVENT: connect to database ok: 10.643778
EVENT: connect to database ok: 10.682975
EVENT: connect to database ok: 1.673851
EVENT: connect to database ok: 1.730793
EVENT: connect to database ok: 1.783833
EVENT: connect to database ok: 1.842732
EVENT: connect to database ok: 1.764685
EVENT: connect to database ok: 1.816217
EVENT: connect to database ok: 4.625328

有的甚至达到了10s钟，请问各位是否有方法优化？