18c DBUA takes long time (8 hrs) to Upgrade the database if user tablespaces are kept in read only mode
(Doc ID 2553682.1)
Last updated on OCTOBER 09, 2019
Applies to:Oracle Database - Enterprise Edition - Version 220.127.116.11.0 and later
Information in this document applies to any platform.
Oracle18c upgrade takes long time (in this case 8hr) to upgrade from 18.104.22.168 to 22.214.171.124 oracle version when user tablespaces are kept in Read Only mode
Choose to put user table spaces in READ ONLY MODE during upgrade
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