[oracle@jtwy02 ~]$ sqlplus ‘/as sysdba‘

SQL*Plus: Release 11.2.0.4.0 Production on Sat Oct 13 14:14:13 2018

Copyright (c) 1982, 2013, Oracle.  All rights reserved.

ERROR:
ORA-00020: maximum number of processes (150) exceeded

解决方法：[root@oracle 11g ~]$ps -ef|grep "oracleXXXX (LOCAL=NO)"|grep -v grep|awk ‘{print $2}‘|xargs kill -9

重新登录数据库