Oracle 19C RAC open_links_per_instance引數問題
說明:
近期測試,將open_links_per_instance引數改成0後,Oracle 11g RAC可以生效,Oracle 19.3 RAC無法啟動例項,
先將問題記錄下來,有時間在研究:
環境:
DB:Oracle 19.3 RAC(兩個例項)
OS:Redhat 6.7
操作:
節點1:
SQL> show parameter open_link NAME TYPE VALUE ------------------------------------ ----------- ------------------------------ open_links integer 4 open_links_per_instance integer 4
SQL> alter system set open_links_per_instance=0 scope=spfile sid='*'; System altered.
SQL> shutdown immediate Database closed. Database dismounted. ORACLE instance shut down.
啟動報錯,無法nomount
SQL> startup ORA-03113: end-of-file on communication channel
分析告警日誌:沒有對應的錯誤
###alert_cjc1.log 2021-02-24T17:10:57.599168+08:00 Starting ORACLE instance (normal) (OS id: 30044) 2021-02-24T17:10:57.895661+08:00 **************************************************** Sys-V shared memory will be used for creating SGA **************************************************** 2021-02-24T17:10:57.896841+08:00 ********************************************************************** 2021-02-24T17:10:57.896920+08:00 Dump of system resources acquired for SHARED GLOBAL AREA (SGA) 2021-02-24T17:10:57.897110+08:00 Domain name: user.slice 2021-02-24T17:10:57.897286+08:00 Per process system memlock (soft) limit = 14G 2021-02-24T17:10:57.897455+08:00 Expected per process system memlock (soft) limit to lock instance MAX SHARED GLOBAL AREA (SGA) into memory: 7682M 2021-02-24T17:10:57.897809+08:00 Available system pagesizes: 4K, 2048K 2021-02-24T17:10:57.898180+08:00 Supported system pagesize(s): 2021-02-24T17:10:57.898427+08:00 PAGESIZE AVAILABLE_PAGES EXPECTED_PAGES ALLOCATED_PAGES ERROR(s) 2021-02-24T17:10:57.898619+08:00 4K Configured 11 34698 NONE 2021-02-24T17:10:57.898922+08:00 2048K 3773 3841 3773 NONE 2021-02-24T17:10:57.899116+08:00 RECOMMENDATION: 2021-02-24T17:10:57.899346+08:00 1. For optimal performance, configure system with expected number of pages for every supported system pagesize prior to the next instance restart operation. 2021-02-24T17:10:57.903856+08:00 ********************************************************************** 2021-02-24T17:11:01.066125+08:00 LICENSE_MAX_SESSION = 0 LICENSE_SESSIONS_WARNING = 0 2021-02-24T17:11:01.098878+08:00 Initial number of CPU is 4 Number of processor cores in the system is 4 Number of processor sockets in the system is 4 KSXRTEST ISGA: RM Channel count = 1 KSXRTEST ISGA: rcnt= 70 rmrcnt = 1 Capability Type : Network capabilities requested : 7 detected : 0 Simulated : 0 Capability Type : Runtime Environment capabilities requested : 400000FF detected : 40000000 Simulated : 0 Capability Type : Engineered Systems capabilities requested : 7 detected : 0 Simulated : 0 Capability Type : Database Test capabilities requested : 3 detected : 0 Simulated : 0 kjidomenacan initialized to 0 Using LOG_ARCHIVE_DEST_1 parameter default value as /oracle/db/product/19.0.0/dbs/arch Autotune of undo retention is turned on. LICENSE_MAX_USERS = 0 SYS auditing is disabled
過一會再次啟動也不行
[oracle@rac1 ~]$ sqlplus / as sysdba SQL*Plus: Release 19.0.0.0.0 - Production on Wed Feb 24 16:55:35 2021 Version 19.3.0.0.0 Copyright (c) 1982, 2019, Oracle. All rights reserved. Connected. SQL> startup ORA-01081: cannot start already-running ORACLE - shut it down first
臨時解決方案:
在節點2執行reset命令,回退引數。
SQL> alter system reset open_links_per_instance scope=spfile sid='*';
再次啟動節點1,可以正常啟動了。
###2021-03-16 13:07 chenjuchao###
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