mysql performance tuning parameters

This article transferred from: http://www.cnblogs.com/chen77716/archive/2010/06/26/2130807.htmlRecent memory leaks due to the project, so large-scale JVM performance tuning, now the experience to do a record.First, JVM memory model and garbage collection algorithm1. According to the Java Virtual Machine specification, the JVM divides the memory into: New (Young Generation) Tenured (old generati

SQLServerProfiler-performance tuning has enough reason to become a hot topic. Today's fierce competition in the business field, if users think that an application is too slow, they will immediately turn to another vendor. To meet user requirements, SQL tracking loads some event classes, which can be used to find and debug performance bottlenecks.

below: The total number of instances created on the left, the structure of the instance on the right, and the reference description below, which can be seen in the class Cyclicdependencies and referenced by HashMap.This can determine the location of the leak, and then according to the actual situation to analyze and solve. JVISUALVM remotely monitor Tomcat 1 and modify the remote Tomcat's catalina.sh profile, where it adds: java_opts="$JAVA _opts -djava.rmi.server.hostname=192.168.

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 (disa

-party applications running on Linux, there are many performance tuning techniques that can help you improve the performance of your Linux servers and lower your operating costs.14. Correct configuration of MySQLTo allocate more memory to MySQL, you can set the MySQL cache s

Tags: case sensitiveLower_case_table_names=1 #不区分大小写 skip-name-resolve # Disable DNS resolution Character-set-server=utf8 Wait_timeout=1 interactive_timeout = 288000 max_allowed_packet = 1000M max_connections=3000 Character-set-server=utf8 innodb_buffer_pool_size = 1000M innodb_additional_mem_pool_size = 200M innodb_flush_log_at_trx_commit=2 innodb_autoextend_increment=800m innodb_log_buffer_size = 200M # Innodb_log_file_size = 100M key_buffer_size=800m read_buffer_size=600m thread_cache_size=64

For Linux system tuning parameters, all TCP/IP tuning parameters are located in the/proc/sys/net/directory. For example, the following are some of the most important tuning parameters, and their meanings are as follows: 1./proc/sy

to adjust. starting with MySQL 5.6.3 , This parameter is no longer needed. (Error log [Warning] option ' innodb_additional_mem_pool_size ': Signed value 512000 adjusted to 524288). */In the example , the default configuration is the default configuration, which is 8M. in the Mysql manual, the recommended setting for 2G memory is 20M. In general, set up the General Assembly caused by the waste of physical

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

Recently, due to Project Memory leakage, large-scale JVM performance tuning has been performed. , Now we will record the experience. I. JVM Memory Model and garbage collection Algorithm 1. According to the Java Virtual Machine specification, JVM divides the memory: New (young generation) Tenured (elder generation) Permanent generation (Perm) Among them, new and tenured are heap memory. The heap memory

Here and you to share the JVM parameter tuning eight experience, JVM parameter tuning, this is a headache problem, bad settings, the JVM is constantly executing FULLGC, resulting in the entire system becomes very slow, the site can be stagnant for more than 10 seconds, I believe that through this study you have a new understanding of the JVM parameter tuning.Examples of eight experiences on

The method of performance tuning for Linux operating system 2013-03-18 15:35 Honestqiao Chinaunixfont Size:T | T Linux is a free-to-use and free-to-propagate Unix-like operating system, with different Linux distributions and different kernels making changes to the parameters and settings, allowing the system to achieve better

Tuning OverviewMost spark job performance is mainly consumed in the shuffle link, because this link contains a lot of disk IO, serialization, network data transmission and other operations. Therefore, if you want to make the performance of the job to a higher level, it is necessary to tune the shuffle process. But it's also important to remind you that the factor

Tuning OverviewMost spark job performance is mainly consumed in the shuffle link, because this link contains a lot of disk IO, serialization, network data transmission and other operations. Therefore, if you want to make the performance of the job to a higher level, it is necessary to tune the shuffle process. But it's also important to remind you that the factor

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 using the ulimit command. The ulimit-aS command displays the current limit, and the ulimit-aH command displays the hard limit (before Ke

, you should increase the value of both Acceptcount and MaxThreads . 5,enablelookups= "false": whether to turn on the domain name counter-check, generally set to false to improve processing power, its value and true, is rarely used. 6,maxkeepaliverequests= "1":nginx Dynamic transfer to Tomcat,nginx is not keepalive, and the Tomcat side of the default open KeepAlive,Will wait for keepalive timeout, default is not set to use ConnectionTimeout. So you must set the Tomcat timeout and turn off Tomc

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Talk about linux performance tuning 12: Red Hat optimization strategy Tuned talking about linux performance tuning 11: Memory Allocation Management http://www.2cto.com/os/201307/228761.html A dynamic tuning solution launched by RedHat allows you to use different

All the TCP/IP tuning parameters of linuxtcp/ip are in the/proc/sys/net/directory. for example, the following are some of the most important optimization parameters, which are followed by their meanings: www.2cto. com1./proc/sys/net/core/rmem_max mdash; maximum TCP data receiving buffer 2... Linux TCP/IP tuning

RedHat Performance Tuning Performance Optimization aims to improve performance and reduce the impact of resource consumption and applications on the system. If it is implemented prematurely or without performance evaluation, performance