mysql performance tuning parameters

Introduction: 2 database servers, one instance per server, one instance has one library, 2 databases fail each other, and the maximum memory is set to 50% of physical memory, but due to the increase in load caused by the memory shortage problem: In the previous 2000, the database does not respond to the system's memory pressure, So only set 50% to ensure memory balance is used, but 4. Sun will introduce new APIs to tune MySQL

effectively improve performance if external storage is used.13. Adjust Linux file descriptor limitsLinux limits the number of file descriptors that any process can open, with the default limit of 1024 per process, which may hinder benchmarking clients (such as Httperf and Apachebench) and the Web server itself from getting the best performance, with one process per connection for Apache, So it is not affec

Performance Tuning Recommendations1. Optimize your query for query cachingMost MySQL servers have query caching turned on. This is one of the most effective ways to improve sex, and this is handled by the MySQL database engine. When many of the same queries are executed multiple times, the results of these queries are

default limit is 1024 per process. These restrictions may impede the benchmark test client (such as httperf and apache.pdf) and the Web server itself to obtain the best performance, each Apache connection uses a process, so it will not be affected, but a single process Web server, such as Zeus is a file descriptor for each connection, therefore, it is easy to be affected by the default limit. The file opening limit is a limit that can be adjusted usi

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. Cl

A graduation on the contact optimization problems, professional optimization also has at least 5 years of time, but now still often hear many people think that optimization is very simple, is to build index problem, it really can not blame everyone, do this line for more than 20 years, at every stage of career, almost can hear such a voice, In many books have also seen such a statement, but here I want to tell you: optimization is not just index, optimization is not very simple thing, this job r

overview of the various options with links to the relevant documentation. This article assumes that the reader has a basic understanding of the Nginx architecture and configuration concepts, so it is not a simple copy of an Nginx document, however, an overview of various options and links to relevant documents are provided. A good rule to follow when doing tuning is to change one setting at a time and if it does not result in a positive change in

options with links to the relevant documentation. This article assumes that the reader has a basic understanding of the nginx architecture and configuration concepts, so it is not a simple copy of an nginx document, however, an overview of various options and links to relevant documents are provided. A good rule to follow when doing tuning is to change one setting at a time and if it does not result in a positive change in

Redis Performance Tuning: Save the effect of SNAPSHOT on performance, redissnapshot Some time ago, the Development Environment reported that access to the Redis server was very slow, and each request took several seconds. 2 ~ This will happen again in three days. I checked the Linux performance and there is no problem.