oracle performance tuning books

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Course Description This video is an example to explain, is the author many years of practical work encountered some problems summarized and refined. The goal is to give the reader a correct and clear idea of the video can be done on their own, after understanding the video, can be directly applied to the project work, to play the value of performance test engineers.To learn the performance test can not be

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Oracle Objective Over the past decade, Oracle has become one of the most professional databases in the world. For IT professionals, it is important to ensure that Oracle's powerful features are used to improve the productivity of their companies. One of the most effective ways to do this is through Oracle tuning. It h

Chapter 2 procedural performance tuning of PL/SQL applications I. Reasons for PL/SQL Performance problems When the execution efficiency of PL/SQL-based applications is low, it is usually caused by poor SQL statements and programming methods, poor understanding of PL/SQL basics or misuse of shared memory. Bad SQL statements in PL/SQL PL/SQL programming see

), or (or), and not (non). Not can be used to negate any logical operation symbol. The following is an example of a NOT clause: ... where not (status = ' VALID ') If you want to use not, you should precede the phrase with parentheses and precede the phrase with the NOT operator. The NOT operator is included in another logical operator, which is the not equal to ( . : Where status For this query, it can be rewritten to not use not: SELECT * FROM employee where salary Although the results of thes

should precede the phrase with parentheses and precede the phrase with the NOT operator. The NOT operator is included in another logical operator, which is the not equal to (... where status For this query, it can be rewritten to not use not:SELECT * FROM employee where salaryAlthough the results of these two queries are the same, the second query scenario is faster than the first query scenario. The second query allows Oracle to use indexes on salar

Author: (US) Tony Andrews Translator: Chen Yong Yang Health Series name: Chapter Hua programmer library Publishing House: Machinery Industry Publishing House ISBN: 9787111425021 shelving time: -6-4 published on: July 4,: 16 webpage: 86 versions: 1-1 category: more about computers> DB2 SQL Performance Tuning tips computer books DB2 SQL

Trust a lot of friends, whether it is to do development, architecture, or DBA, are often heard that the word "tune". Speaking of "tune", may let a lot of technical staff heart surging, may also make a lot of people feel distressed. Of course, there are a lot of people are dismissive of this, because not everyone has access to the project is very large, and not everyone does the project is very high performance requirements. In the mainstream enterpri

Although the WebLogic version has now been upgraded to 10.3 and is packaged as Oracle Funsion middleware 11g, the new data is relatively small, sharing a WebLogic Classic version 8.1 performance tuning article. --------------------------------------------------------------------------------------------------------------- ---- Any successful product in the market

I believe many of my friends, whether engaged in development, architecture, or DBA, often hear the word "tuning. Speaking of "tuning", it may make many technical staff feel excited, or it may make many people feel distressed. Of course, there are also many people who despise this because not everyone is exposed to a large number of projects, and not everyone does have high

feature that accelerates SQL adjustment as a whole.Through SPA, once a load (called SQL tuning set or STS) is created, Oracle will use the complex prediction module to repeatedly execute the workload (To obtain the best SQL Execution Plan for the current load. With SPA, we can predict the impact of an SQL load based on system changes, as well as the predicted image parameters.Adjustment, system schema adju

Talking about linux performance tuning 9: changing system default limits; talking about linux performance tuning 8: Removing unnecessary overhead http://www.2cto.com/os/201307/228393.html After reading the first two articles, we are trying to save resources for our real services. Problem: our service is actually used..

engine federated to solve. The Federated storage Engine is a solution for MySQL to address issues like Oracle's DB Link. The main difference from Oracle DB Link is that federated saves a copy of the remote table structure's definition information locally. At first glance, Federated is really a great solution for cross-node joins. But we should also be clear, it seems that if the remote table structure is changed, the local table definition informatio

are some bugs, is not necessarily applicable to the core of the online system.3. DRBD Disk Network mirroring schemeAdvantage: Software is powerful, data is mirrored across physical hosts at the underlying fast device level, and different levels of synchronization can be configured according to performance and reliability requirements. IO operations are kept in order to meet the database's demanding data consistency.Disadvantage: Non-Distributed File

Performance issues with Java EE applications are a very important issue for serious projects and products. In particular, enterprise-class applications, concurrent users, a large number of data transmission, business logic complex, occupy more system resources, so performance problems in enterprise-class applications become critical, it and the stability of the system has a direct link. More importantly, th

Configuration:Minheapfreeratio = 40Maxheapfreeratio = 70Maxheapsize = 1342177280 (1280.0MB)NewSize = 134217728 (128.0MB)Maxnewsize = 134217728 (128.0MB)Oldsize = 402653184 (384.0MB)Newratio = 15Survivorratio = 1024PermSize = 100663296 (96.0MB)MaxPermSize = 100663296 (96.0MB)Heap Usage:New Generation (Eden + 1 Survivor Space):Capacity = 134152192 (127.9375MB)used = 22525464 (21.481956481933594MB)Free = 111626728 (106.4555435180664MB)16.790977220856742% usedEden Space:Capacity = 134086656 (127.87

engineers generally do not remotely manage computers, need to provide information such as log the larger the disk space, the slower the reading speed, You can consider using multiple hard disks to make up a larger space partition just on the hard disk to do the identification, rather than the format in the file system features, so speed faster hard disk faster than the outside speed [partition number is smaller, the outer region, so the volume of data large first partition]. Program developers