Less Performance Impact with Unified Auditing in #Oracle 12c

Uwe Hesse

There is a new auditing architecture in place with Oracle Database 12c, called Unified Auditing. Why would you want to use it? Because it has significantly less performance impact than the old approach. We buffer now audit records in the SGA and write them asynchronously to disk, that’s the trick.

Other benefits of the new approach are that we have now one centralized way (and one syntax also) to deal with all the various auditing features that have been introduced over time, like Fine Grained Auditing etc. But the key improvement in my opinion is the reduced performance impact, because that was often hurting customers in the past. Let’s see it in action! First, I will record a baseline without any auditing:

[oracle@uhesse ~]$ sqlplus / as sysdba SQL*Plus: Release 12.1.0.2.0 Production on Fri Jul 31 08:54:32 2015 Copyright (c) 1982, 2014, Oracle. All rights reserved. Connected to: Oracle Database…

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