You can significantly improve the performance of Oracle Waveset (Waveset) software across nearly all activities with the proper tuning. In addition to changing settings within the software, you can make performance improvements by tuning the application server, the Java Virtual Machine (JVM machine),...
For every SQL statement, the Oracle optimizer generates an execution plan, which is a series of steps that the server takes to execute the statement. These steps are determined by rules given in Oracle9i Application Developer's Guide - Fundamentals. Following these rules will help you write ...
tuningperformance evaluationThe current paper presents the main ways of monitoring and tuning of an Oracle instance. The issues discussed are : Requirements for tuning, description of oracle objects and utilities used and methods for SQL, Shared Pool, Buffer Cache and Redo Log Buffer optimization....
Optimally, in an OLTP environment the percentage of sorts performed in memory should be high; refer to the Oracle8i Designing and Tuning for Performance manual (i.e. the "server tuning" guide) for information on tuning sorts. • Soft parse ratio The soft parse ratio shows the total number...
Index Tuning using the SQLAccess Advisor which recommends a set of indexes (and implementation script) based on a workload (the current contents of the SQL Cache, a user defined set of SQL statements, or a SQL Tuning set). It's invoked from Advisor Central in Oracle Enterprise Manager or...
Basic Tuning Tools [ ] Diagnose performance issues using top wait events and the time model [ ] Use dynamic performance views to view statistics and wait events [ ] Use Enterprise Manager Monitoring [ ] Identify the key tuning components of the alert logs Using Automatic Workload Repository ...
This Oracle Performance Tuning course curriculum, designed by DBA experts, provides the skillset needed to scale up through various Database Administration Roles in the organization. We ensure you become an expert at Performance Tuning, Performance Views, Explain and Running PLANS and using Applica.....
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当需要排序时,Oracle 会使用 Full Index Scans,因为他的结果已经排好序;当不排序时,会使用 Fast Full Index Scans,因为能使用多块读,速度更快。 在rebuild index 时使用的就是 Fast Full Index Scans,所以 rebuild index 需要排序。(参见汪海的 《Rebuild Index与 Sort》http://www.dbanotes.net/Oracle/Rebuild...
Top Oracle DBA interview questions, Oracle RAC interview questions, Oracle database architecture, backup/recovery of database and performance tuning Questions on Advanced Topics for Experienced Professionals.