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Tag Archives: PERFORMANCE TUNING

Top New features of Oracle 12c

Oracle 12c has brought smiles to many DBAs and Developers faces. In the series of article i will introduce you to all awesome new features of Oracle 12c. This will do wonder in Capacity planning, Cost Optimization and reduce maintenance cost. 1. Invisible Columns : Now no need to create Custom tables for reference data. With

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Parallel Index Creation with Data Pump Import in Oracle DB 12.1.0.2

Oracle Database Enterprise Edition Version 12.1.0.2 Problem Statement : Indexes are not picking parallel processes while execution of impdp utility SOLUTION Parallelism is used for loading user data, package bodies and for building indexes.   It was noticed that the indexes are not created in parallel, since there is only one worker process executing this task. The

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Oracle Database 12c Feature: Multitenant Database

“Sometimes there was a Situation where you have to create two different schema in the same databases,but both with the same name.” A typical example is in this case of SIEBEL applications which have a specific schema name – SIEBEL, So if you want to install two SIEBEL applications in the same database, we always

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Tuning Query without Changing Code by Using SQL Plan Baseline

In day to day application performance monitoring we encountered with Un-optimized SQL consuming significant Database time. Only solution comes to mind is to improve the performance of the SQL by making changes in siebel configuration or Scripting(adding/removing hints, changing the order of joins, removing unnecessary function calls etc.) to get optimized SQL. Sometimes it is

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Siebel Database optimization – Hidden init.ora parameter “_always_semi_join”

A Siebel Query with a Subquery is very Slow in an Oracle CBO Siebel Environment. The Slow Performance was improved by using the Hidden init.ora parameter “_always_semi_join”   SYMPTOMS Performance problems are observed within the system. A certain query is taking, on average, 7 minutes to be returned. The DBA has run that query exactly

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