pdq 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

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.Ora

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

Hu Xi, "Apache Kafka actual Combat" author, Beihang University Master of Computer Science, is currently a mutual gold company computing platform director, has worked in IBM, Sogou, Weibo and other companies. Domestic active Kafka code contributor.ObjectiveAlthough Apache Kafka is now fully evolved into a streaming processing platform, most users still use their core functions: Message Queuing. For how to effectively monitor and tune Kafka is a big topic, many users have such a problem, today we

threads.Of course, here are a few thread operations can set their own, the maximum recommended for the current system configuration of the logical core number, of course, the large set can be just useless.Second , index Hint hints (index Hint)The so-called index hint hint is to force the query optimizer to perform a scan of a query statement or use a specified index.In this way, we often use in the tuning of a way, many times we create the index is i

Original: 2-year summary of SQL Server DBA tuning2 years SQL Server DBA Summary of tuningWhen I was 2 DBA I felt that there was something that needed to be shared with everyone to discuss the book first.Book List1. "In-depth analysis of SQL Server 2008 series" This is the MSSQL 2005 Technology Insider series. Version 2012 also out of interest can see, Technical Insider Series is I contact the earliest book, inside the content is very large, but are donuts. So many of them can be carefully tasted

Five areas of Sybase database application system tuning2011/3/14/13:49 Source: HC IT network Taking "the Internet banking system of a large commercial bank" as an example, this paper deals with five major areas of database application system tuning: Stress testing, application-side tuning, server-side tuning, optimization of system platform layer, optimization of

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