问题，RAC安装后一切正常，但是sqlplus 进入空闲连接
[oracle@hzcity dbs]$ sqlplus / as sysdba SQL*Plus: Release 12.2.0.1.0 Production on Wed Nov 11 18:26:07 2020 Copyright (c) 1982, 2016, Oracle. All rights reserved. Connected to an idle instance.
检查RAC状态，一切显示正常
[root@gzcity 122]# crsctl status res -t -------------------------------------------------------------------------------- Name Target State Server State details -------------------------------------------------------------------------------- Local Resources -------------------------------------------------------------------------------- ora.ASMNET1LSNR_ASM.lsnr ONLINE ONLINE gzcity STABLE ONLINE ONLINE hzcity STABLE ONLINE ONLINE nycity STABLE ora.DATA.dg ONLINE ONLINE gzcity STABLE ONLINE ONLINE hzcity STABLE ONLINE ONLINE nycity STABLE ora.LISTENER.lsnr ONLINE ONLINE gzcity STABLE ONLINE ONLINE hzcity STABLE ONLINE ONLINE nycity STABLE ora.chad ONLINE ONLINE gzcity STABLE ONLINE ONLINE hzcity STABLE ONLINE ONLINE nycity STABLE ora.net1.network ONLINE ONLINE gzcity STABLE ONLINE ONLINE hzcity STABLE ONLINE ONLINE nycity STABLE ora.ons ONLINE ONLINE gzcity STABLE ONLINE ONLINE hzcity STABLE ONLINE ONLINE nycity STABLE -------------------------------------------------------------------------------- Cluster Resources -------------------------------------------------------------------------------- ora.LISTENER_SCAN1.lsnr 1 ONLINE ONLINE gzcity STABLE ora.LISTENER_SCAN2.lsnr 1 ONLINE ONLINE nycity STABLE ora.LISTENER_SCAN3.lsnr 1 ONLINE ONLINE hzcity STABLE ora.MGMTLSNR 1 ONLINE ONLINE hzcity 169.254.54.9 10.10.1 0.4,STABLE ora.asm 1 ONLINE ONLINE gzcity Started,STABLE 2 ONLINE ONLINE nycity Started,STABLE 3 ONLINE ONLINE hzcity Started,STABLE ora.cncity.db 1 ONLINE ONLINE gzcity Open,HOME=/oracle/ap p/oracle/122,STABLE 2 ONLINE ONLINE nycity Open,HOME=/oracle/ap p/oracle/122,STABLE 3 ONLINE ONLINE hzcity Open,HOME=/oracle/ap p/oracle/122,STABLE ora.cvu 1 ONLINE ONLINE hzcity STABLE ora.gzcity.vip 1 ONLINE ONLINE gzcity STABLE ora.hzcity.vip 1 ONLINE ONLINE hzcity STABLE ora.mgmtdb 1 ONLINE ONLINE hzcity Open,STABLE ora.nycity.vip 1 ONLINE ONLINE nycity STABLE ora.qosmserver 1 ONLINE ONLINE hzcity STABLE ora.scan1.vip 1 ONLINE ONLINE gzcity STABLE ora.scan2.vip 1 ONLINE ONLINE nycity STABLE ora.scan3.vip 1 ONLINE ONLINE hzcity STABLE --------------------------------------------------------------------------------
尝试将ORACLE_SID 设为ORACLE_UNQNAME，查看各个节点的instance 名字
[oracle@gzcity ~]$ export ORACLE_SID=cncity [oracle@gzcity ~]$ sqlplus /nolog SQL*Plus: Release 12.2.0.1.0 Production on Wed Nov 11 18:45:53 2020 Copyright (c) 1982, 2016, Oracle. All rights reserved. SQL> conn sys/oracle@cncity as sysdba Connected. SQL> select instance_name from gv_$instance; INSTANCE_NAME ---------------- cncity2 cncity3 cncity1 SQL> col instance_name for A10; SQL> col host_name for A10; SQL> col host_name for A20; SQL> select instance_name,host_name,archiver,thread#,status from gv$instance;; INSTANCE_N HOST_NAME ARCHIVE THREAD# STATUS ---------- -------------------- ------- ---------- ------------ cncity2 nycity.inno.com STARTED 2 OPEN cncity3 hzcity.inno.com STARTED 3 OPEN cncity1 gzcity.inno.com STARTED 1 OPEN
检查，oracle用户的配置文件
[oracle@hzcity ~]$ env|grep -i oracle_sid ORACLE_SID=hzcity
原来，oracle的用户环境和系统内的配置文件不一致，按 gv$instance中的各个节点为的INSTANCE_NAME;修改oracle 配置文件中的ORALCE_SID：然后再试后成功
[oracle@gzcity ~]$ . .bash_profile --更新用户环境变量 [oracle@gzcity ~]$ sqlplus / as sysdba SQL*Plus: Release 12.2.0.1.0 Production on Wed Nov 11 18:50:40 2020 Copyright (c) 1982, 2016, Oracle. All rights reserved. Connected to: Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit Production
总结，RAC中各节点的ORALE_SID 是按一定的命名规则设定的，不可以更改。