April 6, 2006
PGA_AGGREGATE_TARGET参数的变更
作者:eygle
出处:http://blog.eygle.com
从Oracle9i开始,Oracle引入了自动PGA管理的新特型,PGA_AGGREGATE_TARGET参数用于控制PGA的总体期望目标:
$ sqlplus "/ as sysdba" SQL*Plus: Release 9.2.0.4.0 - Production on Thu Apr 6 16:40:13 2006 Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.
SQL> show parameter pga NAME TYPE VALUE |
但是在Oracle9i中，PGA_AGGREGATE_TARGET参数仅对专用服务器模式下（Dedicated Server）的专属连接有效，对共享服务器（Shared Server）连接无效；从Oracle10g开始PGA_AGGREGATE_TARGET对专用服务器连接和共享服务器连接同时生效。
Posted by eygle at 4:37 PM | Comments (0)
Oracle10g与各版本的连通性
作者:eygle
出处:http://blog.eygle.com
昨天有朋友问到Oracle10g和Oracle8i的连通性问题,一时记不清楚,同事作了一些测试.得到的结论是:
Oracle8.1.5可以连接Oracle10g
Oracle8.1.7也可以连接Oracle10g
Oracle10gR2可以连接Oracle8.1.7,但是不能连接Oracle8.1.5
Oracle10g和Oracle9i各版本可以互连.
简要记录于此:
1.Oracle8.1.5连接Oracle10gR1
oracle:/oracle/oracle8/network/admin>sqlplus /nolog
SQL*Plus: Release 8.1.5.0.0 - Production on Wed Apr 5 17:21:30 2006
(c) Copyright 1999 oracle Corporation. All rights reserved.
SQL> conn mlqin/*****@mmsdb
Connected.
SQL> select * from v$version
2 /
BANNER
----------------------------------------------------------------
oracle Database 10g Enterprise Edition Release 10.1.0.3.0 - 64bi
PL/SQL Release 10.1.0.3.0 - Production
CORE 10.1.0.3.0 Production
TNS for Solaris: Version 10.1.0.3.0 - Production
NLSRTL Version 10.1.0.3.0 - Production
SQL> exit
|
2.Oracle8.1.7连接Oracle10gR2
$ sqlplus /nolog
SQL*Plus: Release 8.1.7.0.0 - Production on Wed Apr 5 16:58:05 2006
(c) Copyright 2000 oracle Corporation. All rights reserved.
SQL> conn mlqin/*****@hsstat
Connected.
SQL> select * from v$version;
BANNER
----------------------------------------------------------------
oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bi
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for Solaris: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
SQL> exit
Disconnected from oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
|
3.Oracle10gR2连接Oracle8.1.7.4
$ sqlplus /nolog
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Apr 5 17:19:01 2006
Copyright (c) 1982, 2005, oracle. All rights reserved.
SQL> conn mlqin/*****@test8
Connected.
SQL> select * from v$version;
BANNER
----------------------------------------------------------------
Oracle8i Enterprise Edition Release 8.1.7.4.0 - 64bit Production
PL/SQL Release 8.1.7.4.0 - Production
CORE 8.1.7.0.0 Production
TNS for Solaris: Version 8.1.7.4.0 - Production
NLSRTL Version 3.4.1.0.0 - Production
SQL>
|
4.Oracle10gR2不能连接Oracle8.1.5
$ sqlplus /nolog
SQL*Plus: Release 10.2.0.1.0 - Production on Wed Apr 5 17:09:38 2006
Copyright (c) 1982, 2005, oracle. All rights reserved.
SQL> conn mlqin/****@199
ERROR:
ORA-03134: Connections to this server version are no longer supported.
|
Posted by eygle at 4:35 PM | Comments (2)