Oracle 10g 應用補丁PSU 10.2.0.5.180717
最近測試了一下在Oracle 10g下面(單例項下面)升級、應用補丁PSU 10.2.0.5.180717，打這個補丁的主要原因是 Oracle 將於 2019年6月啟用新的SCN相容性，並且由於BigSCN的作用，96K每秒的SCN增速，都可能會使得通過DB Link的訪問產生SCN過度拉昇，所以新的補丁需要被應用。最近（2018年8月份）Oracle 提供了針對 Oracle 10g 最終版本 10.2.0.5 的修正補丁，為低版本使用者提供了一個解決方案。更多這方面的相關知識，可以參考這篇文章升級更新:Oracle關於DB Link在2019年升級的10g版本相容性。下面按照官方文件從Patch Pre-Installation Instructions,Patch Installation Instructions,Post Installation Instructions這三個方面來測試、驗證一下
Patch Pre-Installation Instructions
安裝這個補丁對OPatch Utility的版本有要求，要求OPatch 10.2 version 10.2.0.5.0 或之後的版本，否則在應用補丁的過程就會遇到一些錯誤，後面例子會介紹這個具體錯誤，以及如何升級OPatch Utility（此處不展開，後面展開）
檢查opatch版本
不符合要求的版本的例子：
#$ORACLE_HOME/OPatch/opatch version
Invoking OPatch 10.2.0.4.9
OPatch Version: 10.2.0.4.9
OPatch succeeded.
符合要求的版本的例子：
#$ORACLE_HOME/OPatch/opatch version
Invoking OPatch 10.2.0.5.1
OPatch Version: 10.2.0.5.1
OPatch succeeded.
注意事項：
To install the PSU 10.2.0.5.180717 patch, the Oracle home must have the 10.2.0.5.0 Database installed. Subsequent PSU patches can be installed on Oracle Database 10.2.0.5.0 or any PSU with a lower 5th numeral version than the one being installed.
首先要去meatalink上下載Patch 26493118 也就是 Oracle Database Patch Set Update 10.2.0.5.171017。當然下載這個補丁是需要口令。不過我們下載的是補丁程式26493118: DATABASE PATCH SET UPDATE 10.2.0.5.171017， 因為我去下載的時候，這個補丁程式集已經被取代（Patch 26925212 is a super set of patch 26493118）。
關閉監聽、ORACLE例項等。
如下所示：
$ lsnrctl stop
SQL> shutdown immediate
$ emctl status dbconsole
TZ set to PRC
OC4J Configuration issue. /u01/app/oracle/product/10.2.0/db_1/oc4j/j2ee/OC4J_DBConsole_getlnx14uat.esquel.com_SCM2 not found.
如果EM服務是執行狀態，就必須關閉
$ emctl stop dbconsole
$ unzip p26925212_10205_Linux-x86-64.zip
解壓後，我們最好檢查一下當前環境是否存在補丁衝突
Determine whether any currently installed one-off patches conflict with the PSU patch as follows:
opatch prereq CheckConflictAgainstOHWithDetail -phBaseDir ./26925212
正常情況：
[[email protected] klb]$ $ORACLE_HOME/OPatch/opatch prereq CheckConflictAgainstOHWithDetail -phBaseDir ./26925212/
Invoking OPatch 10.2.0.4.9
Oracle Interim Patch Installer version 10.2.0.4.9
Copyright (c) 2009, Oracle Corporation. All rights reserved.
PREREQ session
Oracle Home : /u01/app/oracle/product/10.2.0/db_1
Central Inventory : /u01/app/oracle/oraInventory
from : /etc/oraInst.loc
OPatch version : 10.2.0.4.9
OUI version : 10.2.0.5.0
OUI location : /u01/app/oracle/product/10.2.0/db_1/oui
Log file location : /u01/app/oracle/product/10.2.0/db_1/cfgtoollogs/opatch/opatch2018-11-01_22-35-10PM.log
Patch history file: /u01/app/oracle/product/10.2.0/db_1/cfgtoollogs/opatch/opatch_history.txt
Invoking prereq "checkconflictagainstohwithdetail"
Prereq "checkConflictAgainstOHWithDetail" passed.
衝突情況：
[[email protected] tmp]$ $ORACLE_HOME/OPatch/opatch prereq CheckConflictAgainstOHWithDetail -phBaseDir ./26925212/
Invoking OPatch 10.2.0.5.1
Oracle Interim Patch Installer version 10.2.0.5.1
Copyright (c) 2010, Oracle Corporation. All rights reserved.
PREREQ session
Oracle Home : /u01/app/oracle/product/10.2.0/db_1
Central Inventory : /u01/app/oracle/oraInventory
from : /etc/oraInst.loc
OPatch version : 10.2.0.5.1
OUI version : 10.2.0.5.0
OUI location : /u01/app/oracle/product/10.2.0/db_1/oui
Log file location : /u01/app/oracle/product/10.2.0/db_1/cfgtoollogs/opatch/opatch2018-11-04_14-44-35PM.log
Patch history file: /u01/app/oracle/product/10.2.0/db_1/cfgtoollogs/opatch/opatch_history.txt
Invoking prereq "checkconflictagainstohwithdetail"
ZOP-47: The patch(es) has supersets with other patches installed in the Oracle Home (or) among themselves.
Prereq "checkConflictAgainstOHWithDetail" failed.
Summary of Conflict Analysis:
Patches that can be applied now without any conflicts are :
26925212
Following patches are not required, as they are subset of the patches in Oracle Home or subset of the patches in the given list :
9949948, 7612454