Pega Upgrade to 8.2 DB2 Linux
Upgrade guide says below
IBM Db2 operating-system users
All IBM Db2 users must also exist at the operating system level. Before you create the database user accounts, define the operatingsystem-level users and authorizations:
• Deployment user - This user must have Administrative privileges on the operating system. For example, in Windows this user is a member of the Administrators Group.
• Admin – This user must have Administrative privileges on the operating system. For example, in Windows this user is a member of the Administrators Group.
• Base – This user must not have Administrator privileges on the operating system.
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For upgrades why we need this to be performed? shouldn't these be available when we do the installation