By Mark Gurry
One of an important demanding situations confronted via Oracle database directors and Oracle builders is the necessity to music SQL statements so they execute successfully. Poorly tuned SQL statements are one of many top explanations of substandard database functionality and terrible reaction time. SQL statements that practice poorly lead to frustration for clients, and will even hinder a corporation from serving its clients in a well timed manner.
In this ebook, Mark Gurry stocks his in-depth wisdom of Oracle's SQL assertion optimizers. Mark's wisdom is the results of many hard-fought tuning battles in the course of his decades of offering Oracle tuning companies to consumers. Mark offers insights into the workings of the rule-based optimizer that move way past what the principles inform you. Mark additionally presents suggestions to many universal difficulties that take place with either the rule-based and cost-based optimizers.
In addition to the explicit problem/solution eventualities for the optimizers, Mark presents a few convenient SQL tuning information. He discusses many of the optimizer tricks, telling you after they can be utilized to sturdy impression. ultimately, Mark discusses using the DBMS_STATS package deal to regulate database statistics, and using outlines to specify execution plans for SQL statements in third-party purposes that you just cannot in a different way modify.
Read or Download Oracle SQL tuning poket reference PDF
Best oracle books
This booklet lias been written for the subsequent audiences:■ Management-You could have bought Oracle9i for purposes except Java improvement in the database. even though, for you to be aware of extra approximately Oracle9i Java beneficial properties, see "Overview of Oracle9i Java Documentation" on web page 1-23 for a administration point of view.
There are few books out that take care of Oracle textual content and XSQL. utilizing the methodologies, practices, and so on. i discovered no use to go looking for one more reference.
Oracle functionality Survival consultant a scientific method of Database Optimization the quick, whole, start-to-finish consultant to optimizing Oracle functionality Oracle functionality Survival consultant bargains a based, systematic, start-to-finish technique for optimizing Oracle functionality as successfully as attainable.
This self-study examination coaching advisor for the Oracle Database 10g Database Administrator OCP certification examination comprises every thing you want to try out your self and cross the examination. All examination issues are lined and insider secrets and techniques, entire reasons of all Oracle Database 10g Database Administrator OCP matters, try tips and advice, a variety of hugely practical pattern questions, and routines designed to reinforce realizing of Oracle Database 10g Database Administrator OCP thoughts and get ready you for examination luck at the first test are supplied.
- OCP Oracle8i DBA architecture & administration and backup & recovery study guide
- OCP: Oracle 10g Administration II Study Guide
- Oracle: A User’s Guide
Additional resources for Oracle SQL tuning poket reference
It is also not a fe ature that is uniquely available in Oracle databases—for example, SQL Server has a n extended stored procedure called xp_cmdshell t hat a llows calls to a ny program at t he Window OS level from within the database. These features are valuable for developers and for enhancing productivity but they are bad from a security point of view. One of the most important principles in good security is segregation. Once the database can also make calls to programs (potentially any programs) at t he OS level, the ability to limit what an attacker can do becomes much harder.
All these methods are identical for 8i, 9i, 10g, and 11g. Let’s look at an example with 10g: LSNRCTL> change_ password Old password: New password: Reenter new password: Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=ORCL) ) ) Password changed for LISTENER The command completed successfully LSNRCTL> save_config Connecting to (DESCRIPTION =(ADDRESS =(PROTOCOL=IPC)(KEY=ORCL) ) ) Saved LISTENER configuration parameters. 0 - P roduction Start Date Uptime Trace Level Security SNMP O ISTENER TNSLSNR for IBM/AIX RISC System/6000: Version 03-MAR-2008 16:23:01 0 days 0 hr.
Ora a nd add a l ine of t he form ADMIN_RESTRICTIONS_