performance tuning in oracle 11g

In general, Oracle 11g R2 RAC provides the following features: High Availability: shared-everything mode ensures that services are not stopped when a single node fails, and other nodes in the cluster will take over quickly Scalability: multiple nodes share the load and can provide processing capabilities far beyond that of a single database. Addition and deletion of nodes can be completed online without

Oracle 11g introduces new features Spa (SQL performance Analyze) is now widely used in upgrades and migrations, and of course some other scenarios can be considered, such as optimizer parameter modification, IO subsystem change, etc., which can be used by the DBA Provides detailed information about the performance of S

I. Overview Performance risks may occur when the SQL Execution Plan of an SQL statement is changed. There are many reasons for changing the SQL plan, such as the Optimized Program version, optimized program statistics, optimized program parameters, solution definition, system design, and SQL profile creation. In earlier versions of Oracle DB, various plan control technologies (such as storedoutline (9i) and

After successfully installing the Oracle 11g Database, you will find that your computer runs slowly, and your computer with low configuration may even experience very bad conditions, by disabling non-essential Oracle services, you can speed up your computer. So what should we do? After Oracle

Tags: developer an art create system detailed scheduling Web AgentAfter successfully installing Oracle 11g in accordance with the methods in Windows 7 64-bit installation of Oracle 11g R2, there are 7 services that have the meanings of seven services, respectively:1. Oracle

July 2014, wrote an article about EF5 with Visual Studio, Oracle 11g, the original address: http://www.cnblogs.com/HouZhiHouJueBlogs/p/ 3844028.html, Oracle is now supported to EF6. Technical update fast, some details such as not recorded, it is easy to be forgotten, so there is this blog post.　　Some basic knowledge of. NET support from

Label:After successfully installing Oracle 11g, a total of 7 servicesThe meanings of these seven services are:1. Oracle ORCL VSS Writer Service:Oracle Volume Mapping copy write service, VSS (Volume Shadow Copy service) enables the creation of high-fidelity point-in-time images (Shadow copy) of storage infrastructure devices such as disks, arrays, and so on. It ca

First, IntroductionThe importance of Oracle databases in system operations is self-evident, and the knowledge of operating systems and databases is deepened through familiarity with the installation of Oracle. The environment for this installation test is as follows:Operating system: CentOS 6.5 X64Database: Oracledatabase 11g Release 2 (11.2.0.1.0) for Linux x86-

When you install an application that contains thousands of tables and indexes, if each table and index is initially allocated a 10 MB initialExtent. You will soon realize that if each object needs to allocate 10 MB of disk space during creation, it will take a lot of time to deploy the DDL. You may thinkOracle delays the initial extent allocation of each object until the actual insert records in the table. The only way to delay the generation of the object's initial segment is to useOracle Datab

Oracle 11g Release 1 (11.1) tablespace -- simple management permanent tablespace this article content create tablespace view tablespace modify tablespace availability/read/write Delete tablespace www.2cto.com suppose database is Oracle 11g, log on to SQL * PLUS with the SYS user. This article demonstrates creating a (p

Using Oracle ODP. Net 11g. Net Program release method () ODP. net 11g is released by Oracle for. netProgramThe ADO. NET component that accesses the Oracle database has better performance than the

From: http://www.3lian.com/edu/2013/08-03/86558.htmlAfter successfully installing the Oracle 11g database, you will find that your computer is running slower, that your computer is running faster with a lower-profile PC or even a very card-enabled Oracle service. So, how do you do it specifically?After successfully installing

The following articles mainly introduce the five most unique features of Oracle 11g. We all know that compared with the storage data in the non-compressed format, the new Oracle Data Compression Technology ensures that the disk storage space is reduced by more than three times with lower overhead. This is more advantageous than saving only disk space, because it

stuff is already installed, you can check it with Nslookup. The DNS server in the test environment is a separate machine, not the same machine as the two RAC machines. Before the exam, I did not prepare for DNS, ready to use the Hosts file to install the RAC environment.5. Do I need additional installation packages, such as various RPM?The answer is no, the exam environment is 32-bit Oracle Linux, the database requires the package has been installed,

maximum of four inline NICs to improve performance. You do not need to bind them. You can deploy multiple NICs as appropriate.3. oracle 11g RAC iptables configuration, originally the database is generally not configured with a firewall, but various factors require configuration, it is difficult to find a foreign Article configuration, after installation practice

Oracle 11g audit files Audit: The audit option enabled by default for Oracle 11g. The default value of AUDIT_TRAIL is DB, which indicates that audit data will be recorded in the base table of the audit dictionary in the database. In Oracle 10 Gb, the default value of this pa

troublesome because complicated triggers are also compiled after the history tracking table is created to ensure that the historical data is precisely tracked. The capture of historical information is also very efficient, because the Oracle 11g specially modified the kernel to minimize the performance overhead of historical data retention. In addition, the histo

1.2 requirement Software Installation A typical development environment includes the following components: Jdeveloper-refer to 3.1 "installing Oracle jdeveloper ." Webcenter extension bundle-please refer to 3.2 "installing the webcenter extension bundle ." Supported database-(optional) for example, Oracle Database 11g. Supported content repository-(optional)

I. Temporary table space contraction 1.1 Description About Oracle's temporary tablespace, a blog has been collated before: Oracle Temp temporary table space http://blog.csdn.net/tianlesoftware/article/details/4697417 The following operations can take up a large amount of temporary: 1, users perform IMP/EXP Import export operations, will use a large number of temporary segments 2, the user in Rebuild index 3. Execute CREATE TABLE ... as statement 4,

protected] ~]$ Rman target Sys/[email protected] auxiliary sys/[email protected] Recovery manager:release 11.2.0.3.0-production on Thu Mar 5 17:51:23 2015 Copyright (c) 1982, Oracle and/or its affiliates. All rights reserved. Connected to target DATABASE:JLPROJCT (dbid=2115662724)Connected to auxiliary database:jlprojct (not mounted) Eight: In the main library to execute the duplicate command, the most critical step, back up the main library control