jd tuning

the database tier, combined with our practice in Java application tuning.JVM Tuning: GC PainSogou Commercial platform A system reconfiguration when the RMI is selected as the internal Remote call protocol, the system started to appear after the periodic service stop response, pause time from a few seconds to a few 10 seconds. By observing the GC logs, it is discovered that a full GC appears every hour after the service starts. Because the system heap

Original: SQL Server Tuning Series Advanced (query statement running several indicator value monitoring)ObjectiveIn the previous article, we analyzed how the query optimizer works, including: detailed operation steps of the query optimizer, analysis of filter conditions, optimization of index items, and other information.In this article we analyze the detection of several key indicator values in the course of our operation.These indicator values are a

Original: SQL Server Tuning Series Basics (subquery operations Summary)ObjectiveIn the previous articles, we introduced a series of descriptions of operators and the optimization methods and techniques for each operator. This includes a series of our common operators, including how to view execution plans, how several datasets are commonly used, how to join operators, and parallel operators. Interested children's shoes can be clicked to view.In this a

less with y?Here is the statistical information in the FirstName, it not only know the contents of the row data in the field "long what kind of", and still know the distribution of each row of data.In fact, this is like in the library, each bookshelf is a table, and each book is a row of data, the index is like a library book list, such as by category, and statistics is like the number of each kind of books and storage of the Bookshelf location. So when you borrow a book, you need an index to s

Recently it has been a tangle of performance analysis and tuning how to start with hardware first, or from code or database first. From the operating system (CPU scheduling, memory management, process scheduling, disk I/O), Network, Protocol (HTTP, TCP/IP), or from application code, database tuning, middleware configuration and so on.Single middleware also sub-web middleware (Apache, IIS), Application middl

Performance TuningIt is undoubtedly a huge topic and a very important part of many projects. Performance Tuning is well known. After all, performance tuning covers too many aspects.ArticleLet's take a look at the process of performance tuning this huge project, and also look at some common practices in these processes. Deterministic optimization goals Performan

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

Introduction: Looking for a resource center to tune Websphere®portal Web Content Management and Ibm®db2®for linux®, UNIX®, and Windows® environments? This article describes the unique parts of the environment that require special consideration. You will learn how to tune application Server and WebSphere Portal. As a good start, you will learn about the various registry variables and database Manager and database configuration parameters that should be set to the specified value. Finally, the ong

Since the advent of Java is very popular, rapid development, the C + + language to form a strong impact. In the global cloud computing and mobile Internet industry environment, Java has a significant advantage and broad prospects, then the growing number of Java-based projects, the requirements of the Java operating environment is increasingly high, Many Java programmers only know the expansion of the business and do not know the Java itself to run the environment of debugging, such as virtual m

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 database. Or

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 database.

DB2forIBMi provides a series of performance tuning tools. VisualExplain is an important one. It graphically displays the access plan generated after the DB2fori database query engine intelligently optimizes Users' Query requests. DB2 for IBM I provides a series of performance tuning tools, and Visual Explain is an important one. It graphically displays the access plan generated by the DB2 for I database que

This document describes how to use SQL Plan Management to manage SQL Execution plans. SQL Plan management provides components for capturing, selecting, and evolving SQL Plan information to prevent performance degradation caused by sudden changes in the execution Plan of SQL statements. See http://blog.csdn.net/davidwang9527/article/details/18620953 FOR THE FIRST PART This article includes the following topics:3. Use SQL Plan Baseline with SQL Tuning A

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