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oracle 19c的补丁目前已经发布到19.26版本了，数据库补丁安装也是数据库运维中的一个常见工作；近期在一个安装补丁的环境遇到了Prerequisite check "CheckSystemSpace" failed.错误，看起来是磁盘剩余空间不足的告警；按以前经验，可用空间还有近10GB，

查阅文档，是需要22GB以上的可用空间，同时可以用OPatch.SKIP_VERIFY_SPACE=true参数来跳过。

在实际安装时，发现用OPatch.SKIP_VERIFY_SPACE=true参数可以开始安装，但是安装过程中依然有报错，最终还是需要扩大空间的。所以后续遇到这样问题直接考虑扩大空间吧：

[oracle@oracle19c 36912597]$ opatch apply
Oracle Interim Patch Installer version 12.2.0.1.44
Copyright (c) 2025, Oracle Corporation.  All rights reserved.

Oracle Home       : /u01/app/oracle/product/19c/dbhome_1
Central Inventory : /u01/app/oraInventory
   from           : /u01/app/oracle/product/19c/dbhome_1/oraInst.loc
OPatch version    : 12.2.0.1.44
OUI version       : 12.2.0.7.0
Log file location : /u01/app/oracle/product/19c/dbhome_1/cfgtoollogs/opatch/opatch2025-02-12_13-34-10PM_1.log

Verifying environment and performing prerequisite checks...
Prerequisite check "CheckSystemSpace" failed.
The details are:
Required amount of space(8202.362MB) is not available.
UtilSession failed: 
Prerequisite check "CheckSystemSpace" failed.
Log file location: /u01/app/oracle/product/19c/dbhome_1/cfgtoollogs/opatch/opatch2025-02-12_13-34-10PM_1.log

查阅文档，是需要22GB以上的可用空间，同时可以用OPatch.SKIP_VERIFY_SPACE=true参数来跳过。

在实际安装时，发现用OPatch.SKIP_VERIFY_SPACE=true参数可以开始安装，但是安装过程中依然有报错，最终还是需要扩大空间的，日志如下：

[oracle@oracle19c 36912597]$ opatch apply OPatch.SKIP_VERIFY_SPACE=true
Oracle Interim Patch Installer version 12.2.0.1.44
Copyright (c) 2025, Oracle Corporation.  All rights reserved.

Oracle Home       : /u01/app/oracle/product/19c/dbhome_1
Central Inventory : /u01/app/oraInventory
   from           : /u01/app/oracle/product/19c/dbhome_1/oraInst.loc
OPatch version    : 12.2.0.1.44
OUI version       : 12.2.0.7.0
Log file location : /u01/app/oracle/product/19c/dbhome_1/cfgtoollogs/opatch/opatch2025-02-12_13-37-22PM_1.log

Verifying environment and performing prerequisite checks...
OPatch continues with these patches:   36912597  

Do you want to proceed? [y|n]
y
User Responded with: Y
All checks passed.

Please shutdown Oracle instances running out of this ORACLE_HOME on the local system.
(Oracle Home = '/u01/app/oracle/product/19c/dbhome_1')

Is the local system ready for patching? [y|n]