aed tuning

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 has a large number of tuning parameters and techniques to improve the performance of your Oracle d

Label:I believe a lot of friends, whether it is to do development, architecture, or DBA, are often heard of the word "tuning". Talk about "tuning", may make a lot of technical staff heart passion, also may make a lot of people feel distressed, do not know how to start. Of course, there are many people who are dismissive of this, because not everyone does the project is very high performance requirements. In

This technical article is provided by the "International Oracle user group" (ioug). It is an organization composed of user groups. This organization provides high-quality information, training, networking, and support, to improve the level of Oracle Database experts and database developers. This article is excerpted from the foreseeable procedural performance tuning of Oracle Applications by David Welch. Click here to become a member of the "Internati

Label: 1. IntroductionDatabase tuning can make database applications run faster, and it requires a comprehensive consideration of complex factors. Evenly distributing the data on disk can improve the I/O utilization, improve the reading and writing performance of the data, the appropriate degree of non-normalization can improve the performance of the system query, indexing and writing efficient SQL statements can effectively avoid low performance oper

Data Engine Tuning Advisor is one of the database performance tuning tools provided by sqlserver. Let's take a look at how to use this tool to optimize database design. Database Engine Tuning Advisor Tuning Recommend the best mix of indexes for databases by using the query optimizer to analyze queries in a worklo

Tuning OverviewMost spark job performance is mainly consumed in the shuffle link, because this link contains a lot of disk IO, serialization, network data transmission and other operations. Therefore, if you want to make the performance of the job to a higher level, it is necessary to tune the shuffle process. But it's also important to remind you that the factors that affect the performance of a spark job are primarily code development, resource para

Tuning OverviewMost spark job performance is mainly consumed in the shuffle link, because this link contains a lot of disk IO, serialization, network data transmission and other operations. Therefore, if you want to make the performance of the job to a higher level, it is necessary to tune the shuffle process. But it's also important to remind you that the factors that affect the performance of a spark job are primarily code development, resource para

Previous section Study reviewIn the previous section, the main study of the sun jdk some of the command line and visual performance monitoring tools for specific use, but the focus of performance analysis is to solve the problem of the idea, there is no good ideas, and then good tools are futile.This section focuses on learningIn the book, the main content of this section is to talk about the author in the work process of some of the best experience in combat. For our readers, the focus is to le

1.JVM Tuning Summary (1): Some concepts: http://www.importnew.com/18694.html2.JVM Tuning Summary (2): Basic garbage collection algorithm: http://www.importnew.com/18740.html3.JVM Tuning Summary (3): Problems with garbage collection: http://www.importnew.com/18747.html4.JVM Tuning Summary (4): Generational garbage colle

. When a query is executed, SQL Server does not read more or less data than is actually required, so when executing the same query on the same dataset, the resulting logical read numbers are always the same.Why is it important to know the logical read value of SQL Server when executing queries in tuning query performance? Because this number does not change each time the same query is executed. So, when it comes to

In earlier articles, the detect methodology in performance tuning was mentioned, and the Detect methodology was briefly reviewed here.Discover the problem: finding problemsExplore The conditions: Reasons to exploreTrack down possible approaches: providing a possible solutionExecute the most likely approach: perform the best possible solutionCheck of Success: Confirm success (if not successful, repeat the above steps)Tie up Loose Ends: complete Remaini

Oracle Oracle Expert Tuning Secrets 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 has a large number of

SQLServerProfiler-performance tuning has enough reason to become a hot topic. Today's fierce competition in the business field, if users think that an application is too slow, they will immediately turn to another vendor. To meet user requirements, SQL tracking loads some event classes, which can be used to find and debug performance bottlenecks. Performance SQL Server Profiler-performance tuning has enough

Framework Official Guide Series 52--topic: Performance Tuning Summary: The performance of a network application is affected by many factors. Database access, file system operations, network bandwidth, and so on are all potential factors. Yii has reduced the performance impact of the framework in all aspects. But in the user's application there are still a lot of ... 2. Performance optimization of PHP optimization performance

I. Tuning needs to focus on several aspects Memory tuning Tuning CPU Usage Lock Competition Tuning I/O tuning Two. Twitter's biggest enemy: latencyWhat are some of the causes of the delay? The biggest impact factor is the GC Others are:

priorities, users can adjust without authorization.10. Reasonable control of the start time of the reduce taskIf the reduce task is started prematurely, it may reduce resource utilization by causing the "slot hoarding" phenomenon caused by the reduce task to occupy the reduce slot resource for long periods of time, and conversely, if the reduce task is started too late, it will cause the reduce Task gets the resource delay, increasing the run time of the job.three Task level parameters tuningTh

the job according to the importance of the job, the different important degree of the job allows the configuration of different priorities, users can adjust without authorization.10. Reasonable control of the start time of the reduce taskIf the reduce task is started prematurely, it may reduce resource utilization by causing the "slot hoarding" phenomenon caused by the reduce task to occupy the reduce slot resource for long periods of time, and conversely, if the reduce task is started too late

Article Source: http://www.cnblogs.com/dingjie08/archive/2009/11/10/1599929.htmlObjectiveRecently help friends to run the platform for Performance tuning, the effect is good, so write it out together to exchange. If the article has you feel wrong, or do not understand, please add QQ Group: 4656272, Welcome to correct and discuss together. (PS: Vulgar Humanities pen is poor, crossing please more magnanimous)BackgroundFriend's platform website belongs t

Reference indicators for performance Execution time-from the time the code starts running to the end CPU time--the time that a function or thread consumes the CPU Memory allocation-a scenario in which a program consumes memory at run time Disk throughput--Describe the use of IO Network throughput--describe the use of the network Response time-The response time that the system makes to a user's behavior or time The bottleneck resources

, process properties, and resources for the build process. If you understand the process constructs, you can understand what is important for the running and performance of the process. Figure 1-2 shows an overview of process information related to process architecture.Linux process management for Linux Performance and Tuning Guide (translation)Figure 1-2 Task_struct Structural BodyThe life cycle of the 1.1.2 processEach process has its life cycle, su