Category Performance

Tuning with ASH Analytics in #em12c

Performance tuning of the Oracle Database has always been a great thing to learn and a valuable skill for any database administer.  In a previous post, I talked about how to use the Active Workload Repository (AWR) and Active Session History (ASH) to performance turn a database.  In this post, I want to take a […]

Performance Tuning with AWR & ASH in #em12c

Oracle monitoring and performance tuning has grown over the years.  With every release of the Oracle database the monitoring capabilities that have been provided have evolved.  In Oracle11g, monitoring with statpack has given way to Automatic Workload Repository (AWR) and Active Session History (ASH) for near real time monitoring of items within the Oracle database.  […]

Combat with an enqueue wait event (enq: HW–Contention)

Recently I’ve been combating a high water mark enqueue wait (enq: HW – contention) on a single node within an Exadata I’m supporting.   I first noticed the wait when I was looking at the performance page for the node in Oracle Enterprise Manager 12c.  What I noticed was the a lot of brown looking spikes […]

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