Tuning Key
Improved Oracle Database By Properly Tuning
Ensuring that a database is tuned properly is one of the most important responsibilities of a DBA. By tuning a database, performance and efficiencies will increase. There are several reasons that a DBA should do performance tuning. First, the computing speed might be wasting time as users wait for a response. Also, it will enable a system to keep up with the pace at which business is conducted. The final benefit is that it will save money by optimizing the use of its hardware.
Learn about the importance of database tuning.
Where should Oracle tuning be focused? There are several areas that can be tuned. The order of these steps is very important, if they are done out of order than side effects will occur.
Designing The Database
Poor system performance is generally caused by poor database design. Generally the database should be normalized to the 3NF. Important performance improvements can be supplied from selective denormalization. The “data access path” should always be on top of your mind when designing the database. Finally, look at proper data partitioning, data replication, aggregation tables for decision support systems, etc.
Tuning of the Application
By coding optimal SQL most Oracle system performance issues can be avoided. A DBA should consider appropriate scheduling of batch tasks after peak working hours.
Memory Tuning
Look at wait events, buffer hit ratios, system swapping and paging, etc. to properly size your database buffers. You could also pin large objects into memory to prevent numerous reloads.
Tuning of the Disk I/O
For maximum disk subsystem throughout check for proper sizing and placement of database files. In addition, look for frequent disk sorts, full table scans, missing indexes, row chaining, data fragmentation, etc.
Elimination of Database Contention
Review latches, database locks, and wait events eliminate as many as possible.
Tune the Operating System
Monitor and tune operating system CPU, I/O and memory utilization.
Find some tips on Oracle tuning.
If the previous steps are followed correctly the Oracle tuning process should be effective and database performance will be enhanced.
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