postgresql performance tuning parameters

for a standalone Pgsql server, such as 4G of memory, can be set to 3.5G (437500)Maintence_work_mem: The memory defined here is only used when create INDEX, vacuum, etc., so the frequency is not high, but often these instructions consume more resources, so the instructions should be quickly executed as soon as possible: to MAINTENCE_WORK_MEM large memory, such as 512M ( 524288)max_connections: Typically, the purpose of max_connections is to prevent max_connections * work_mem from exceeding the a

the maximum cache that PostgreSQL can use, and this number should be large enough for a standalone Pgsql server, such as 4G of memory, which can be set to 3.5G (437500)MAINTENCE_WORK_MEM: The memory defined here is only used when create INDEX, vacuum, etc., so the frequency used is not high, but often these instructions consume more resources, so the instructions should be quickly executed as soon as possible: to Maintence_ Work_mem large memory, suc

Tags: implementation mechanism originally page organizes tables based on free article content index ClustFollowing the book on SQL tuning (SQL tuning or SQL optimization) in the essentials of high-performance SQL tuning and case resolution, we talk today about one of the most important core mechanisms of SQL

FineReport performance tuning methods, finereport Performance TuningThe basic idea of FineReport performance optimization is to properly set the memory size of the application server. Generally, the default memory configuration of the server is relatively small. In larger application projects, this memory is not enough

of Tomcat's use of memory solves this problem."%tomcat_home%\bin\catalina.sh" file, add the following settings at the beginning of the file:java_opts=-xms2048m-xmx2048mXMX is used to set the maximum amount of memory your application can use, and if the program is going to take a lot of memory, you need to modify the value to increase this number.XMS is used to set the program initialization when the memory stack size, increase this value, your program's startup

Become a Java GC expert (5)-Java Performance Tuning principle, gc Tuning Not every program needs optimization. If the performance of a program is the same as expected, you don't have to put extra effort into improving its performance. However, after the program debugging is

Jvm-related parameters, tuning, and jvm parameter tuning Common jvm parameters are as follows: -Xmx1024m: Set the JVM maximum available memory to 1024 MB.-Xms1024m: Set JVM to enable the memory to be 1024 MB. This value can be set to the same as-Xmx to avoid JVM re-allocating memory after each garbage collection.-Xmn51

thickness of the arrow lines indicates the amount of data. In a graphical execution plan, each of the different operators has its own property values, and we can move the mouse over the operator icon to view Of course, you can also right-click on the icon, view the properties, go to the Properties panel and view more detailed property values The detailed indicator values for each operator in this case are described later, but there are a few key values here, which can be said to mention a lit

Article title: Overview of tuning methods for Linux network performance tuning. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Author: Yao Ye He Xiaoyu Yang bangqing Hongyun 　　 In two articles:

Linux server performance tuning skills, linux Server TuningPerformance tuning skills for 20 Linux servers Guide Linux is an open-source operating system that supports various hardware platforms. Linux servers are world-renowned. The main difference between Linux and Windows is that, by default, a Linux server does not provide a GUI (graphical user int

MySQL performance tuning and Architecture Design-the idea and solution of the High Availability design in Chapter 17th, mysql Tuning Chapter 1 High Availability design ideas and solutions Preface: The database system is the core part of an application system. To ensure the overall availability of the system, the database system cannot have any problems. For an en

Linux command-line tools:1, Top command: can display the system each process occupies the resource condition.2. SAR command: the system CPU and memory can be sampled periodically.3,vmstate command: It can count the CPU and memory usage and swap usage information, can also be periodically statistical information.4.iostat Command : Provide detailed IO information5,pidstat command: not only can detect the process, but also to detect threads.Windows Inspection Tools:1. Task Manager2. Perfmon

), written by Fernando apesteguia. Why do we need performance tuning? He concluded that "when a release is packaged and sent to the customer's hand, it is designed to be fully compatible with most computers in the market. This is a collection of rather mixed hardware (hard disks, video cards, network cards, and so on ). Therefore, Red Hat, Suse, mandriva, Ubuntu, and some other release vendors have chosen s

value,-xmx four times times the value;3) Set-xms equal to-xmx 1/2 size;4) Set the-xms between 1/10 and 1/4-xmx;5) Use the default settings.You need to determine the most appropriate parameter settings for your own running program based on the specific usage scenario. In addition to the two most important parameters of-XMS and-xmx, there are a number of parameters that are likely to be used, which are often

Performance Tuning overview: I. Overview 2. what is performance tuning? (What) 3. Why performance optimization? (Why) 4. When do I need performance optimization? (When) 5. where do I need per