2 2 s10 performance chip

limitations: 1 The insertion speed is heavily dependent on the insertion order, in the order of the primary key is the fastest way to insert, otherwise there will be page splitting, seriously affecting performance. Therefore, for InnoDB tables, we generally define a self increasing ID column primary key. 2 The cost of updating a primary key is high because it will cause the row to be updated to move. The

OracleSQL performance optimization Series 2 Oracle SQL Performance Optimization Series 2 The ORACLE tutorial is: Oracle SQL Performance Optimization Series 2. 4. Select the most efficient table name sequence (only valid in the ru

acquired data locally; Do not request the same data multiple times;The first technology is easiest to set up and maintain, and the second gives you the greatest degree of control;Set HTTP headers;If you want AJAX messages to be cached by the browser, you must initiate a GET request, and you must send the correct HTTP in the appropriate message, and the expires header tells the browser how long the response message should be cached;----------------------------------------------------------------

Copyright Notice: This article can be reproduced, but it shall not be used for any commercial purposes or other purposes for profit without my permission. I reserve all rights to this article. If you need to reprint the content, Please retain this copyright statement and ensure the integrity of this article. You can also understand the hard work and respect the work of the author. Author: Chen Lei(Jackei) Email:Jackeichan@gmail.com Blog:Http://jackei.cnblogs.com The idea of statistical a

The 2-5-8 principle refers to the response time of the system That is, when the user in 2 seconds to get a response, it will feel the system response quickly; When the user in 2-5 seconds to get a response, you will feel the system response speed is also possible; When the user gets a response within 5-8 seconds, the system responds slowly, but it can be

value. 2.Pagelayout.Page layout model. RecommendedFlowlayout (Add element without absolute positioning attribute). Gridlayout (Absolute positioning attribute)Because of the absolute positioningFlowlayoutProduce more code, mainly the positioning information of controls. 3When releasing a project, remember to release the pageDebugStatus. 4.HtmlLanguage optimization. My advice is to be proficientHtml/JavaScript, Less useVs. net2003Automatically gen

Copyright:Based on the spirit of sharing, this article can be reproduced to benefit more test peers. Please retain this copyright statement upon reprinting and ensure the integrity of the article, but shall not be used for any commercial or other purposes for profit purposes.Original article name: user experience, not metricsOriginal Author: Scott barberSource: http://www.perftestplus.com/resources/UENM2.pdfTranslation name: Performance Test Based on

allocated only when the table is opened by the next thread. tableNum 44. memory usage 1. determine the upper limit of memory available 2. Determine the memory used for each connection to mysql 3. Determine the memory used by the operating system 4. submit all the remaining memory to the mysql Cache The glibc library of the system may also limit the size of memory allocated each time. innodb_buffer_pool 45. CacheThe operating system cache of In

://example.comIf you need to run locust distributed under multiple processes, we can start a main process with "-master":Locust-f. /locust_files/my_locust_file.py--master--host=http://example.comYou can then start any number of slave processes:Locust-f. /locust_files/my_locust_file.py--slave--host=http://example.comIf we want to run locust on multiple machines, we can also define the primary server to which it belongs while starting from the server (if you are running locust on only one machine,

I say the day is even more, then .... Start with the buffer layout information today!-------------------2016-7-22 21:09:12---------------------------14, reduce the number of query layout information, the query will be assigned to the local variables to participate in the calculation.As an example, you can write in a timeout when you continue to pan at the bottom right of the element mesh:1 var current = myelement.offsetleft; 2 current++; 3

Chapter 8 JVM performance monitoring and troubleshooting tools (2), jvm troubleshooting Note: This blog is mainly recorded in "deep understanding of Java Virtual Machine (version 2)" Note: For details about JVM performance monitoring and troubleshooting tools on the command line, see Chapter 7 JVM

In actual use, it is found that the reading operations on the table_info and users tables at the bottom of the Pharos are too frequent. Therefore, the secondary cache is added for these tables to improve performance.0. First modify the hibernate. properties file,AddHibernate. cache. provider_class = net. SF. hibernate. cache. ehcacheproviderHibernate. cache. use_query_cache = true 1. Modify endbran/src/Java/ehcache. xml and add the following content:M

You can fine tune several Webpack plugins to make your bundle as small as it can is for your specific application. However there is a few things you can does for pretty much every application to make it smaller and run faster. In this lesson we'll combine several webpack plugins to optimize things for a React application (this is also applicable F or non-react applications as well).First we need to modify the Prod scripts from:" Build:prod " " Webpack--env.prod-p ",To:" Build:prod " " Webpack--e

Mysql High Performance Memcached (2)This article describes the problems that need to be paid attention to when deploying Memcached and the distributed algorithm of Memcached.Whether you are a new system or a system that has been online for a long time. We can easily configure Memcached, but we need to pay attention to the following issues before Configuration:1. memcached is only a caching mechanism. It sho

aservermodule, as follows:server { listen 8011; server_name localhost; charset utf-8; location / { alias /home/michael/test_space/; }}whichlistenIndicates the port number of the listener,sever_nameis thewebThe name of the server (which can be a domain name, host, or IP address),charsetSpecifies the coded character set, where thelocationThen throughaliasSpecify awebThe file directory of the service.5. Start NginxEnter /usr/local/nginx the directory and enter:sudo

"; string key3 = "key3"; string [] objects = new string [3]; int loop = 10000*5000; // calculate the time log consumed by array storage. key1start (); For (INT I = 0; I Console output: ====================================== Use array settings = 139 percentage, infinityUse Map to set = 1020 percentage, infinityUse array READ = 3 percentage, infinityUse Map to read = 767 percentage, infinity (The code references https://github.com/javamonkey/... java When modifying the 2.0 engi

This document describes how to use SQL Plan Management to manage SQL Execution plans. SQL Plan management provides components for capturing, selecting, and evolving SQL Plan information to prevent performance degradation caused by sudden changes in the execution Plan of SQL statements. See http://blog.csdn.net/davidwang9527/article/details/18620953 FOR THE FIRST PART This article includes the following topics:3. Use SQL Plan Baseline with SQL Tuning A

Author: Tony Qu Because 2.0 of NPOI 95% beta 2 does not use XmlSerializer for serialization, the experiment shows that the performance improvement is almost 10-20 times. Of course, there are many reasons to kill XmlSerializer. First, XmlSerializer has many restrictions. NPOI is the basic library of NPOI. openXmlFormats cannot generate the assembly of XmlSerializer in advance. This is a

Eight methods for optimizing MySQL database performance (2) bitsCN.com Create table customerinfo(CustomerID int not null,Primary key (CustomerID)) TYPE = INNODB;Create table salesinfo(SalesID int not null,CustomerID int not null,Primary key (CustomerID, SalesID ),Foreign key (CustomerID) REFERENCES customerinfo(CustomerID) ON DELETECASCADE) TYPE = INNODB; Note the parameter "on delete cascade" in the exampl

Eight methods for optimizing MySQL database performance (2) bitsCN.com Create table customerinfo(CustomerID int not null,Primary key (CustomerID)) TYPE = INNODB;Create table salesinfo(SalesID int not null,CustomerID int not null,Primary key (CustomerID, SalesID ),Foreign key (CustomerID) REFERENCES customerinfo(CustomerID) ON DELETECASCADE) TYPE = INNODB; Note the parameter "on delete cascade" in the exampl