Hi,
In my last job, we had a system with 2 servers, 3 JVMs each forming 3 clusters. And 99% of our DB config we never shut down any of the JVMs.
Turn on Admin Mode
Wait a minute, go back into admin mode screen to see if all servers/jvms have gone into admin mode (if not, cancel out, wait, repeat until they have)
Apply DB config changes
Turn off Admin Mode
Wait a minute, go back into admin mode screen to see if all servers/JVMs are now out of admin mode (if not, cancel out, wait, repeat until they have - I don't say the change is complete until all servers/JVMs are out of admin mode).
Sometimes we need to go into the user module to see the system sessions and check which JVM is lagging behind. Normally a task node that is doing something, but we schedule our outages taking into account the task schedules (Cron/escalations) so rarely had an issue.
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Cameron Simpson
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