环境说明：
12.1.0.2的GI集群，11.2.0.4的RAC数据库，需要安装最新的补丁。
补丁下载：
12.1.0.2 GI的PSU；11.2.0.4 DB的PSU；OJVM For 11.2.0.4的补丁。
概要说明：
（1）、由于GI的PSU包括了DB的PSU，如果GI版本和DB版本相同，在安装GI的PSU时没有指定oh参数，则会自动DB的PSU，而GI和DB的版本不同时，如果不指定oh参数，它会自动跳过DB PSU的安装过程，而不会出现安装报错的情况。
命令如下：
# export ORACLE_HOME=/u01/app/12.1.0.2/grid; /u01/app/12.1.0.2/grid/OPatch/opatchauto apply /u01/software/27967747/27967747 |
输出如下：
==Following patches were SUCCESSFULLY applied: Patch: /u01/software/27967747/27967747/26983807
Log:
/u01/app/12.1.0.2/grid/cfgtoollogs/opatchauto/core/opatch/opatch2018-12-21_07-37-36AM_1.log Patch:
/u01/software/27967747/27967747/27547329
Log: /u01/app/12.1.0.2/grid/cfgtoollogs/opatchauto/core/opatch/opatch2018-12-21_07-37-36AM_1.log Patch:
/u01/software/27967747/27967747/27762253
Log:
/u01/app/12.1.0.2/grid/cfgtoollogs/opatchauto/core/opatch/opatch2018-12-21_07-37-36AM_1.log Patch:
/u01/software/27967747/27967747/27762277
Log: /u01/app/12.1.0.2/grid/cfgtoollogs/opatchauto/core/opatch/opatch2018-12-21_07-37-36AM_1.log Following homes
are skipped during patching as patches are not applicable: /u01/app/oracle/product/11.2.0.4/dbhome_1 OPatchauto
session completed at Fri Dec 21 08:21:52 2018 |
（2）、安装DB PSU时，会有一个warning：
OPatch found the
word "error" in the stderr of the make command. Please look at
this stderr. You can re-run this make command. Stderr output: chmod: changing
permissions of `/u01/app/oracle/product/11.2.0.4/dbhome_1/bin/extjobO':
Operation not permitted make: [iextjob]
Error 1 (ignored) Composite patch
27734982 successfully applied. |
该warning在MOS 2265726.1中有明确说明，
忽略即可。