Oracle Database Management System 11g introduced a new
extension to the world which quickly became indispensable for many of the
leading companies of world because of its high applicability and practicality. What
does it do? In short and simple terms, Real Application Testing provides a
real-time analysis of the effects of a system upgrade or movement of data from
one database from another and then suggests ways and means to prevent any
potential problems that may arise from such movement of data. This helps make
the movement to the new system smooth and glitch free which used to be a huge
problem earlier and not only saves a lot of unnecessary trial runs but also
reduces the downtime significantly, thus increasing the performance of the
companies.
There are two main components of Oracle Real
Application Testing. The first is Database Replay which allows a completely
test the changes which would be brought about on your system because of the
upgrade/system change by running it at full capacity unlike other simulation
programs which only use small samples and therefore, may miss a lot of glitches
which would then haunt the real run.
The second is the SQL Performance Analyser which shows
the actual impact of the system upgrade/change on the SQL running mechanisms
and any effect due to their performance change. SQL statements and programs
usually run into thousands of lines of codes and system upgrades or patches
tend to mess around with their functionality a lot. SQL Performance Analyser
not only points out potential problems with the SQL execution, it also suggests
possible remediation techniques on the SQL statements. With Real Application
Testing, it is possible to run full scale simulation tests for all system
upgrades, patches and even configuration changes, raise potential problems
which might occur and also suggest remedial measures to sort out all the kinks
before the upgrade is applied.
These all analyzers are machine specific and those are not aware of real server statistics especially there would be more load or more than one database running. Human handled statistics are more important for finding out accurate results of performance testing. High experienced and Oracle specialists can find these all in remote dba work or remote dba services. If you are not knowledge about database administration then you should need to hire either good experienced DBA or hire remote services.
