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relatively small value, the process and the number of threads is a more appropriate value. System calls are also, each time the system function is called, our code will enter the kernel space, resulting in context switching, this is very resource-intensive, but also try to avoid frequent calls to system functions. Too many context switches means that most of your CPU is wasted in context switching, resulting in less time for the CPU to do serious work, and the CPU not being fully utilized, is u
server-side call to the Accept function is actually the connection from the connected accept queue that completes the three-time handshake.The Accept queue and the SYN queue are listen functions to complete the creation of the maintenance./proc/sys/net/core/somaxconn modification Each of the above parameters is actually enough to write an article to analyze, here I just outline the next part of the parameters, note that when modifying the TCP parameters we must be based on their actual nee
problem is always solved, since PHP-FPM does not have a CPU affinity (affinity) binding directive like Nginx, then we can use Taskset binding php-fpm process to fixed cpux to solve the problem:#!/bin/bashcpus=$ (grep-c processor/proc/cpuinfo)pids=$ (ps aux | grep "php-fpm[:] Pool" | awk ' {print $} ')Let I=0For PID in $PIDs; DoCpu=$ (echo "$i% $CPUs" | BC)Let i++TASKSET-PC $CPU $PIDDoneOnce the script is running, let's take a look at how each CPU load is distributed:Shell> mpstat-p all 1 10CPU%
Today, developers continue to develop and deploy applications that use lamp (linux®, Apache, MySQL, and Php/perl) architectures. However, server administrators often have little control over the application itself, because the application is written by someone else. This article focuses on tuning the database layer to achieve maximum efficiency. About MySQL Tuning
"Theoretical basis1, "Introduction to Algorithms"2, "Data structure (c language version)"3. "Computer Organization and Architecture" performance analysis4, "in-depth understanding of computer systems" "Beauty" Randal E. Bryant David O ' Hallaron5, "Operating system: Essence and Design Principle"6, "Compiling principle"7. "Data Communication and computer network"8, "data compression principle and application"Introductory article"
always be put into the scope of consideration.Point 2: Identifying clear performance goals is key.Point 3: You must ensure that the program is running correctly after tuning.Point 4: The performance of the system depends more on the good design, and the tuning technique is just an aid.Point 5: The tuning process is an
MySql performance tuning policy and mysql tuning policy This topic provides detailed parameter descriptions for my. cnf configuration. The sample configuration is as follows: # Cat my. cnf # MySQL client library initialization. [Client] Port = 3306 Socket =/tmp/mysql. sock Character-set-server = utf8 # The MySQL server [Mysqld] Init_connect = 'set na
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 Inspe
CPU, memory, and disk. Once a hardware is short, performance problems may occur. (Recommended Configuration: CPU e5620 x 2 memory 64 gb ssd 500 GB (raid10 )) Backup Server: Generally, the backup server has no requirements, but it must have enough hard disk space. (Recommended Configuration: CPU e5620 x 1 memory 4 GB hard disk 2 TB (RAID5 )) Monitoring Server: Generally, there is no need for a monitoring server. (Recommended Configuration: CPU e5620
know the performance of the problem, such as: insufficient bandwidth, insufficient memory, TCP buffer is not enough, and so on, many times, do not need to adjust the program, only need to adjust the hardware or operating system configuration can be.#p #3.2 Using the profiler testNext, we need to use the performance detection tool, that is, using a profiler to look at the
500 GB (RAID10 )) Backup Server: Generally, the backup server has no requirements, but it must have enough hard disk space. (Recommended configuration: CPU E5620 x 1 Memory 4 GB hard disk 2 TB (RAID5 )) Monitoring server: Generally, there is no need for a monitoring server. (Recommended configuration: CPU E5620 x 1 Memory 4G hard drive 500 (RAID5 )) Other servers: for other servers, you can see the specific needs of specific analysis. ...... Now you know what is the
Xhprof. Xhprof.io uses MySQL in configuration file storage and is less user-friendly than Xhgui.XdebugBefore the advent of xhprof, Xdebug already existed--xdebug is an active Performance analyzer, which means that it should not be used in production environments, but can gain insight into the code.However, it must be used in conjunction with another tool to read the output of the parser, such as Kcachegrind. But Kcachegrind is hard to install on non-
management. It enables you to monitor application, system statistics, and system parameters in real-time and historical mode. In addition, DB2 PE can also help you analyze performance bottlenecks and provide tuning recommendations for system and application performance. With performance Expert, you can manage various
Common tuning methods in linux and common tuning methods in linux Performance Tuning is one of the most important tasks for O M engineers. If your production environment experiences slow system response speed, abnormal hard disk
* ** 1. Performance Testing Microsoft. NET web applications Study Notes: Http://www.docin.com/p-98321621.html * 2. Performance Testing guidance for Web Applications Study Notes: Http://www.docin.com/p-102316463.html ** 3. Integrated Approach to Web performancetesting-a practitioner's guide Study Notes: Http://www.docin.com/p-103350154.html * ** 4. J2EE Performance
Linux memory basic knowledge and related tuning solutions, linux TuningMemory is one of the important components in the computer and serves as a bridge to communicate with the CPU. All programs in the computer run in the memory, so the memory performance has a great impact on the computer. Memory is used to temporarily
: This article mainly introduces the Nginx performance tuning course for performance testing. if you are interested in the PHP Tutorial, please refer to it. Performance testing-performance tuning of Nginx Course viewing address:
system bottom. Summed up can be considered from the following points:1) Tuning of basic performanceThe basic performance here refers to the hardware level or operating system level upgrade optimization, such as network tuning, operating system version upgrades, hardware equipment optimization and so on. For example, the use of F5 and the introduction of SDD HDD,
Nginx Performance Tuning Address: http://nginx.com/blog/tuning-nginx/ Tuning NGINX for Performance Nginx Performance Tuning NGINX is well known as a high
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