oracle performance analyzer

ObjectiveIn the ordinary course of work, sometimes encounter outofmemoryerror, we know that encountered error generally indicates that the program has a serious problem, may be catastrophic. So it is very important to find out what causes outofmemoryerror. Now we introduce the Eclipse Memory Analyzer tool (MAT) to resolve the challenges we face. If not stated, this article uses the Java 5.0 on Windows XP SP3 environment.Why use Mat?Previously, I think

The following chapters are a detailed introduction to Oprofile, interested in children's shoes can continue to read, these chapters are selected from the oprofile of the use of the guide, to understand the Oprofile analysis principles and scope of application is very helpful, is a bit boring: ( In this section, we discuss the core-opcontrol configuration of Oprofile analysis system in depth. Opcontrol script (Note that it is not an executable program OH) There is a default configuration, use t

first, what is Jconsole? Jconsole has been introduced from Java 5. Jconsole is a built-in Java performance Analyzer that can be run from the command line or in a GUI shell. You can easily use Jconsole (or, perhaps, its more high-end "close cousin" VISUALVM) to monitor Java application performance and track code in Java. second, how to start jconsole if it is sta

the conversation, you have to install mat with heap dump.MAT supports two types of installation, one is "standalone version", the user does not have to install the eclipseide environment, the mat is run as a standalone ECLIPSERCP application, and the other is "plugin version", which means that MAT can be used as a plugin for eclipseide. Integration with the Eclipse development platform.Standalone version,: http://www.eclipse.org/mat/downloads.phpDownload the zip package and unzip it to use. The

Original: http://blog.csdn.net/rachel_luo/article/details/8990202 Preface In the ordinary course of work, sometimes encounter outofmemoryerror, we know that encountered error generally indicates that the program has a serious problem, may be catastrophic. So it is very important to find out what causes outofmemoryerror. Now we introduce the Eclipse Memory Analyzer tool (MAT) to resolve the challenges we face. If not stated, this article uses the Java

Development Edition or the visual Studio team Suite to determine the performance bottlenecks in your application. You will be introduced to the Visual Studio Analyzer by walkthrough a sample performance Survey. Note that although we use C # to write code examples in this article, most of the examples here are equally valid for native C/s and Visual basic® code.

classes. In addition, there are duplicate classes functions, but also to assist in the analysis of repeated loading of the class, here is no longer, it is certain that Myabsclass was repeatedly loaded n times. Last In fact, the mat tool is very powerful, the above-mentioned example code does not use the other MAT analysis function, so it is no longer described. In fact, for Oom not only I enumerated two kinds of overflow errors, there are a number of other errors, but I want to say, for P

the installation process for the VTune (intel® vtune™ Performance Analyzer) VTune makes it easy to optimize application performance through a graphical user interface without recompiling. --[Baidu Encyclopedia] Because of the need to use vtune analysis in a development project, the project that was developed is run in a Linux environment, so you want to install

Oracle Log Analyzer Tool Logminer use 1. Set Date format Alter system set nls_date_format= ' Yyyy-mm-dd hh24:mi:ss ' scope=spfile; Select To_char (sysdate, ' Yyyy-mm-dd hh24:mi:ss ') from dual; 2. Add Supplemental Log If the database needs to use Logminer, it should be added, only after this log is added to capture DML ALTER DATABASE ADD Supplemental LOG DATA (PRIMARY KEY, UNIQUE INDEX) COLUMNS; 3. O

Oracle performance optimization and oracle database performance optimization (1)Select the most efficient table name sequence (valid only in the rule-based Optimizer ):The ORACLE parser processes the table names in the FROM clause in the order FROM right to left. The table w

Oracle Performance Optimization Performance Diagnostic Tool-beyond OCP proficient in Oracle video tutorial Training 33Course IntroductionOracle Video tutorial, wind Brother this set of Oracle Tutorial training Oracle

Oracle Performance Analysis 8: Creating indexes and oracle performance indexes When creating an index, we often want to estimate the index size to evaluate the impact on the existing engineering environment. We also hope that the index creation process will minimize the impact on the running engineering environment, yo

Introduction to common Oracle performance scripts and oracle performance scripts In the absence of visual tools to monitor database performance, common scripts come in handy. Below are a few scripts related to Oracle

Oracle Performance Optimization Operation 9: shielding useless indexes and optimizing oracle Performance Example of "oracle performance optimization operation 8" In actual queries, there are also queries involving DisposalCourse

Oracle Performance Optimization Operation 16: Using partition indexes, oracle Performance Optimization When you use analysis commands to analyze partition indexes, the range of data values of each partition is stored in the Oracle Data dictionary.

Connection sequence in the WHERE clause of Oracle performance optimization learning notes, oracle Performance Optimization ORACLE uses the bottom-up sequence to parse the WHERE clause. According to this principle, the join between tables must be written before other WHERE c

Oracle Performance Optimization Operation 10: decomposing complex queries, replacing variables with constants, and optimizing oracle Performance For complex Where condition combinations, Where contains multiple indexed fields, use the IF statement to discuss the situation; At the same time, remove unnecessary Externa

Oracle performance optimization operation 2: Avoid unnecessary type conversion and oracle Performance Optimization It should be noted that the potential data type conversion should be avoided as much as possible. For example, if you compare the numeric data with the numeric data,

is similar to set. The difference is that set is not automatically ordered, while sorted set can sort members by providing an additional priority (score) parameter, it is insert-ordered, that is, automatic sorting. When you need an ordered and non-repeated list of sets, you can choose sorted set data structure. For example, Twitter's public timeline can be stored as score by posting time, in this way, the query is automatically sorted by time. Implementation Method: In redis sorted set, hashm

Oracle performance optimization operation 4: Remove "IN", "OR" whenever possible, oracle Performance Optimization The Where clause containing "IN" and "OR" usually uses a worksheet to invalidate the index; If a large number of duplicate values are not generated, consider splitting the sub-statement. The split sub-sta