Yesterday I have found our database was taking too much wait time. It is a single instance Oracle 12c with around 55gb of SGA memory and 12 CPU cores.
On Enterprise Manager, I have found 5 ADDM findings
The daily expdp job is scheduled to run every day at that time and a few SQL and PL/SQL statements were also running and most of them were Oracle’s own of the sysman user queries, and most of them are taking more than 5 minutes. There were more than 300+ sessions with the database and most of them were using the Java environment but after a few hours eventually, the database was backed off to the normal state. I haven’t understood some of the ADDM analysis. Is there anyone who could help me with that, so that in future I can prevent database from going into the waiting time?
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