I know to check the checkbox to update dialog instance(additional application servers) during the configuration phase to upgrade dialog instances as part of EHP upgrade however before downtime when I am asked to isolate the primary application server, the guide states "Shut down all application servers, if necessary (secondary SAP instances)." I would shut the application servers down for SUM to update and bring them up at the end of the downtime. Can someone advise what clause applies to shutdown if necessary as this statement seem ambiguous to me. We are anyway stopping jobs, users, interfaces from doing anything in production during downtime so I am wondering what could be the possible reason why the application servers can remain running within this clause. Can any one shed some light and your experiences in this regard. I plan to shut them down when isolating PAS and let SUM update them as part of downtime. Does any one differ on this at all.
Regards
Kalyan