A method for gathering statistics without issuing a commit is described in detail, along with tips for improving performance of queries involving volatile tables without changing the SQL code. The algorithm works by allowing the statistics to change only under specific circumstances. Following a review of the benefits and the pitfalls of using dynamic sampling and locking statistics to manage statistics of volatile tables, a robust algorithm that delivers both plan stability and system flexibility is proposed. The challenge is even greater when we are not allowed to change the application design and queries, an increasingly common situation thanks to the growing use of off-the-shelf solutions. It works fine for tables that change little over the day, but it is inadequate for tables which size or data distribution fluctuate every couple of minutes. Oracle’s default statistics gathering process collects statistics every night and over the weekend. Even though Oracle, particularly version 12c, has ways to mitigate suboptimal execution plans, it is best to have the optimizer deliver an excellent plan for every query every time. Learn about these and more in this informative session about Big Data components explained from the perspective of an Oracle professional, how they are the same or different and how they compare with RAC or parallel query.ĭBA TRACK: Managing Statistics of Volatile Tables in OracleAdequate, up-to-date table and index statistics are of utmost importance for achieving optimal database performance. If you have encountered the Hadoop, Hive, Map/Reduce, and Flume acronyms more often than you have the time to pause and think about them, this presentation will help. Arup blogs at .ĭBA TRACK: Big Data Demystified for Oracle ProfessionalsBig Data is the future of database computing and knowing about it is not just a luxury you can avoid anymore it’s necessary for survival and growth. In 2003, he won the coveted Oracle DBA of the Year award. He is an OCP DBA, an Oracle ACE Director and a member of the Oak Table Network.
Arup trains and mentors DBAs, has coauthored 4 books, written some 300 published articles (including the most popular 11g and 10g New Features Series on the Oracle Technology Network) and given numerous presentations. Whenever possible, the concepts will be presented with live demos.Īrup Nanda has been working as an Oracle DBA for the past 17 years. In this presentation, Arup (the author of the popular New Features series on OTN) will condense them into a manageable chunk describing the 12c features that are worth knowing about. Instead of jumping head-first into the pool, learn about the key new features which provide the best bang for the buck. Oracle 12c is out, and so are about 450 new features. KEYNOTE: Oracle 12c: The Gee Whiz Features You Need to Know 35 2005 June General Meeting Presentations.Using a combination of presentation and hands on, this presentation walks through various aspects of the new tool, including editing and debugging PL/SQL, creating user defined reports and more.
You can browse, create, edit, and delete (drop) database objects create, edit, and debug SQL statements and PL/SQL code manipulate data export and import database objects and create reports. With SQL Developer you can manage objects in Oracle databases. SQL Developer, Oracle’s newest graphical alternative to SQL*Plus, allows the database Developer a convenient way to perform basic tasks. These range from command line tools to rich GUI tools.