ORA-12519, TNS:no appropriate service handler found

Microsoft Windows XP [版本 5.1.2600]
(C) 版权所有 1985-2001 Microsoft Corp.

C:\Documents and Settings\Administrator>sqlplus

SQL*Plus: Release 10.2.0.1.0 - Production on 星期五 7月 1 10:46:30 2011

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

请输入用户名:  sys as sysdba
输入口令:

连接到:
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Production

SQL> show parameter processes;

NAME                                 TYPE
------------------------------------ ----------------------
VALUE
------------------------------
aq_tm_processes                      integer
0
db_writer_processes                  integer
1
gcs_server_processes                 integer
0
job_queue_processes                  integer
4
log_archive_max_processes            integer

NAME                                 TYPE
------------------------------------ ----------------------
VALUE
------------------------------
2
processes                            integer
40
SQL> alter system set processes = 900 scope = spfile;

系统已更改。

SQL> shutdown immediate
数据库已经关闭。
已经卸载数据库。
ORACLE 例程已经关闭。
SQL> startup
ORACLE 例程已经启动。

Total System Global Area  805306368 bytes
Fixed Size                  1289996 bytes
Variable Size             209715444 bytes
Database Buffers          591396864 bytes
Redo Buffers                2904064 bytes
数据库装载完毕。
数据库已经打开。
SQL> select value from v$parameter where name = 'processes';

VALUE
--------------------------------------------------------------------------------

900

SQL> select count(*) from v$process;

  COUNT(*)
----------
        36

SQL>