lmr tuning

Tags: mysql performance optimization tuning-primer.shTuning-primer.sh detects the current operation of MySQL, generates reports, and gives recommendations for optimization. Download and use:1.wget http://www.day32.com/MySQL/tuning-primer.sh2. Copy the tuning-primer.sh to the my.cnf Sibling directory3.chmod +xtuning-primer.sh Execution: SH

Tags: non-homogeneous project distribution tuning hold writes merge partitions multiple timesReprinted from XiaoruiSome users (especially the external output) when using Maxcompute (original ODPs), due to the use of the product level and level of understanding of the level of implementation, resulting in the implementation of the task is too long, the occupation of more cluster resources, serious will lead to failure, not only need to invest support s

Analysis of the Process of neutral performance tuning in software testing-Linux general technology-Linux programming and kernel information. The following is a detailed description. Performance Tuning is undoubtedly a huge topic and a very important part of many projects. It is well known that performance tuning is difficult. After all, performance

Oracle 10 Gb later optimizer supports two modes: Normal Mode and tuning mode. In most cases, the optimizer is in normal mode. The CBO-based Normal Mode only takes into account a small part of the Execution Plan set to select which execution plan, because it needs to be as short as possible, it is usually several seconds or milliseconds to parse the current SQL statement and generate an execution plan. Therefore, it is not guaranteed that SQL statement

In 10 Gb, Oracle launched its own auxiliary SQL optimization tool: SQL optimizer (SQL Tuning Advisor: STA), which is a new DBMS_SQLTUNE package. To use the STA, make sure that the optimizer is in CBO mode. However, I think this tool is only suitable for those who do not fully understand SQL optimization. In the end, SQL statements express a business. How can tools understand the business. For SQL optimization, it is best to use excellent tools such as

System Performance Tuning tool under Perf event:linux 2011-05-27 10:35 Liu Ming Ibmdwfont Size:T | T The Perf Event is a performance diagnostic tool that is distributed and maintained with the Linux kernel code, maintained and developed by the kernel community. Perf can be used not only for performance statistical analysis of applications, but also for performance statistics and analysis of kernel code. Thanks to its excellent architectural design, m

The JDK itself provides many convenient JVM performance tuning monitoring tools, in addition to the integrated VISUALVM and Jconsole, there are JPS, Jstack, Jmap, Jhat, Jstat and other small tools, this blog hope to play a useful, Let's start to understand the common tools for tuning JVM performance.In real-world enterprise Java development, sometimes we encounter these problems: OutOfMemoryError,

"Product-level performance tuning and fault diagnosis analysis"Cover big pictureAbout the authorMr. Zheng, 2006~2009 three session of "Microsoft's most valuable expert", won the "Devwow Microsoft blog Tatsu" winner, won the Microsoft "most influential developer" award, through the Microsoft "MCSA/MCSE" certification, the company performance optimization experts, CSDN blog experts, with " Discovering: Vertically cut into ASP. NET 3.5 Control and compon

"Product-level performance tuning and fault diagnosis analysis"Cover big pictureAbout the authorMr. Zheng, 2006~2009 three session of "Microsoft's most valuable expert", won the "Devwow Microsoft blog Tatsu" winner, won the Microsoft "most influential developer" award, through the Microsoft "MCSA/MCSE" certification, the company performance optimization experts, CSDN blog experts, with " Discovering: Vertically cut into ASP. NET 3.5 Control and compon

This is an online database http://www.dbonline.cn. Oracle expert tuning secret Preface　　 In the past decade, Oracle has become one of the world's most professional databases. For IT experts, it is to ensure that their company's productivity is improved by leveraging the powerful features of oracle. One of the most effective methods is to use ORACLE optimization. It has a lot of parameters and technologies to improve the performance of your Oracle

According to the tradition, parameters and settings of different Linux distributions and kernels have been changed, so that the system can achieve better performance. The following section describes how to use the following techniques to optimize performance in Red Hat Enterprise Linux AS and suse linux Enterprise Server systems: QUOTE: 1. Disabling daemons (disable daemons) 2. Shutting down the GUI (Disable GUI) 3. Changing kernel parameters (Change kernel parameters) 4. Kernel parameters (Kern

must be written to disk because the exchange may cause some failures. Therefore, we can exchange the data in the Exchange memory, must be no modified data, modified, to free up, you can only write to the hard disk.With the basic knowledge of memory concepts, here are some common tuning options for memory:I. Tuning parameters related to HugepageCat/proc/zoneinfo can view the segmentation of memory segments

PrefaceThis article continues to explain how to tune the concepts that are relevant to performance optimization in the previous chapter. Code optimization is the most common of us, but there are also software architectures, JVM virtual machine tiers, databases, and operating system levels that can be tuned in various ways to improve performance. The ChaseGeneral steps for optimization:If there is a problem with our system, then the most important thing is to find and solve the performance bottle

Comprehensive in-depth analysis of spark2--knowledge points, source code, Tuning, JVM, graph calculation, projectCourse View Address: http://www.xuetuwuyou.com/course/220The course out of self-study, worry-free network: http://www.xuetuwuyou.comLecturer: Watermelon TeacherA total of 14 chapters, 316 sections, the course from spark-related technical aspects of all-round analysis, and finally the actual project: User interactive behavior Analysis System

This paper is translated from Importnew-Journaldev. Welcome to join the translation team. Please refer to the requirements at the end of this article for reprint. To understand the Java garbage collection mechanism, it is important to understand the JVM memory pattern first. Today we will understand the various parts of the JVM's memory, how to monitor it, and the garbage collection tuning. Java (JVM) memory model As you can see from the above pict

Label:Original: Database Engine Tuning AdvisorDatabase performance is largely dependent on whether the table has a suitable index. However, workloads and data change at any time, and existing indexes may not be entirely appropriate and may require a new index.However, it is very difficult to decide on an index because it can have a negative effect on other queries or other operations because it promotes a query.SQL Server provides the Database Engine

Tags: article get Inter default system memory connection number unit XML file baseThe tuning of Tomcat itself is a tuning setting for several parameters in Conf/server.xml. The first is to have a deep and clear understanding of the meaning of these parameters. Take tomcat8.5 as an example to explain the parameters.It is also important to realize that the Tomcat tuning