UtilSession failed: Prerequisite check "CheckSystemSpace" failed.

[oracle@ODIGettingStarted OPatch]$ ./opatch apply /home/oracle/Downloads/27338049
Oracle Interim Patch Installer version 11.2.0.3.20
Copyright (c) 2019, Oracle Corporation.  All rights reserved.


Oracle Home       : /u01/app/oracle/product/11.2.0/orcl
Central Inventory : /u01/app/oraInventory
   from           : /u01/app/oracle/product/11.2.0/orcl/oraInst.loc
OPatch version    : 11.2.0.3.20
OUI version       : 11.2.0.4.0
Log file location : /u01/app/oracle/product/11.2.0/orcl/cfgtoollogs/opatch/opatch2019-04-07_11-28-32AM_1.log

Verifying environment and performing prerequisite checks...
Prerequisite check "CheckSystemSpace" failed.
The details are:
Required amount of space(805.866MB) is not available.
UtilSession failed:
Prerequisite check "CheckSystemSpace" failed.
Log file location: /u01/app/oracle/product/11.2.0/orcl/cfgtoollogs/opatch/opatch2019-04-07_11-28-32AM_1.log

OPatch failed with error code 73
[oracle@ODIGettingStarted OPatch]$
[oracle@ODIGettingStarted OPatch]$ ./opatch util cleanup -oh /u01/app/oracle/product/11.2.0/orcl
Oracle Interim Patch Installer version 11.2.0.3.20
Copyright (c) 2019, Oracle Corporation.  All rights reserved.


Oracle Home       : /u01/app/oracle/product/11.2.0/orcl
Central Inventory : /u01/app/oraInventory
   from           : /u01/app/oracle/product/11.2.0/orcl/oraInst.loc
OPatch version    : 11.2.0.3.20
OUI version       : 11.2.0.4.0
Log file location : /u01/app/oracle/product/11.2.0/orcl/cfgtoollogs/opatch/opatch2019-04-07_11-32-14AM_1.log

Invoking utility "cleanup"
OPatch will clean up 'restore.sh,make.txt' files and 'scratch,backup' directories.
You will be still able to rollback patches after this cleanup.
Do you want to proceed? [y|n]
y
User Responded with: Y

Backup area for restore has been cleaned up. For a complete list of files/directories
deleted, Please refer log file.

OPatch succeeded.
[oracle@ODIGettingStarted OPatch]$