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Best way to stop RAC instances before maintenance operations

in Database Administration (MOSC) 3 comments

Hi


Oracle 19.14 two node RAC databases.

My question is what would be the best and least painful way to stop certain RAC instances..?

Since now, I've been using:

# crstl stop crs

The problem, well we have 24/7 system, and even if I do this whenever there is less load, then still few sessions get an error due to one instance being shut down.


I have tried also some other methods, for example:

  1. stopping entire home (or all databases with separate command) using -stopoption NORMAL or TRANSACTIONAL - The problem with this one, database shuts down very slowly (like it can take up to 10-15 minutes), and after some time it does not allow any new connections but connections are still redirected this VIP name and all these sessions get "ORA-01033: ORACLE initialization or shutdown in progress" during several minutes. So this will be even more painful for the users.
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