coursera optimization

Live streaming weak network optimization strategy | live streaming SDK performance optimization practices, sdk Performance OptimizationScenarios of weak Network Optimization After more than a year of rapid development, the online live broadcasting industry has developed a variety of methods. The earliest webcast was when the anchor sat in front of the PC and inst

The overview includes the following 5 optimizations: Engine bottom-level optimization, texture optimization, rendering optimization, resource caching, and memory Optimization engine Optimization version 2.0 are optimized for the algorithm and more efficient than the 1.0 vers

The following five optimizations are provided: Engine underlying optimization, texture optimization, rendering optimization, resource cache, and Memory Optimization engine optimization. Version 2.0 is later than version 1.0 inAlgorithmAnd higher efficiency. Version 2.0 uses

only take the corresponding referenced relationship R in the existing primary key value. ④ user-defined integrity (user-definedintegrity): User-added restrictions user-defined integrity is based on the requirements of the application environment and the actual needs of a specific application of the data involved in the binding conditions. This constraint mechanism should generally not be provided by the application, but should be defined and tested by the relation

Text: Table design and optimization (true technical text)Optimize ①: Create normalized tables to eliminate data redundancyDatabase paradigm is a database design method that ensures reasonable database structure, satisfies all kinds of query needs and avoids abnormal database operation. To meet the formal requirements of the table, called the normalization table, the paradigm was generated in the early 1970s, the general table design to meet the first

Usually SQL database needs optimization analysis, and there are some techniques, SQL optimization of several methods here do not do a detailed introduction, this article will be summarized in SQL statement optimization, followed by an optimization tool SQL Tuning Expert for Oracle and the use of methods, First, we need

SQL Optimization-logical Optimization-database constraint rules and semantics optimization, SQL Semantics 1) database integrity ① Entity Integrity (Entity Integrity): yourself A) a link corresponds to an entity set in the real world. -- ER Model B) Entities in the real world have some unique identifiers. -- Primary key C) if the primary ke

User experience said more also actually million change in which, is what users get through the site, the site can give users what, users in the need to get information in the process convenient? This is the user experience, and often the internal optimization of the site is the most can affect the user experience, like himself in front of others said this villa how good, But all are heard, want to really convincing nature to enter the house inside to

Optimization of Max ()For example: Explain select Max (' Payment_date ') from payment; The number of rows that can be viewed to row is very much, which means that the entire table is scanned.Add an index to payment_date.CREATE INDEX Idx_payment on payment (' payment_date ');Execute SQL statement explain select MAX (' Payment_date ') from payment order by Payment_date; You can see that rows is null.Extra:select tables optinized away;Does not scan the e

MySQL Optimization-InnoDB Optimization-mysql Optimization-innodb Learning Plans are easily interrupted, and persistence is not easy. We have recently held a meeting in the company. To adjust the business direction, we suggest learning NodeJS. I would have done a little before NodeJS, but I have not studied it in depth. The syntax of Node is basically the same as

Database optimization-SELECT optimization for SQL optimization-mysql internal optimization policy bitsCN.com Database Bottlenecks often occur in query statements. when such problems occur, the general step is to check whether the correct index is used, You can use the explain SQL statement to check the corresponding fi

NumberAnnotation of factor effective optimization factors1KeywordsKeywords in the URL first best, second, and so on, Chinese also useful2Keywords in the domain name3Title tags in the keyword not too long, 10-30 words within the best, do not use special characters, excessive optimization has penalties4Description tags in the same keyword not too long, within 100 words, over the

optimization scheme (http://www.cnblogs.com/huangye-dream/archive/2013/05/21/3091906.html) Viii. explain viewing index usage in SQLSince the index is important, but there is no index in the SQL execution process, this can be viewed using explain, using the method: Explain SELECT * FROM table_name; is to add explain before the SELECT statement.My local test explain SELECT * from w1000 where id = ' 0000c51e-0ede-4dc2-871a-78c1eebd0041 '; We can see tha

The RAND () Optimization Method for MySQL optimization and the rand Method for mysql Optimization As we all know, in MySQL, if order by rand () is used directly, the efficiency is very poor because it will be executed multiple times. In fact, this is also true if the equivalent query uses RAND (). Let's take a look at the different execution plans and execution t

Cocos2d-x Optimization in image optimization, cocos2d-x optimization picturesIn 2D games, images are undoubtedly the most important resource files. They are loaded into the memory and converted to textures, which are rendered by the GPU on top of the genie. It can be optimized in many aspects, including: image format, puzzle and texture format. Below we will intr

I used to optimize it.AlgorithmBut for most numerical optimization algorithms, local optimization is required. Global optimization is the convex problem on the Convex Set. Simply put, this type of problem is a local optimal solution. The Board is the best. The global optimization problem of multiple local extreme val

The speed of the website is a problem that many people are faced with, in fact, many sites, have not deliberately to optimize the speed of loading, for a site, acceleration not only improve the user experience (if a site in a few seconds did not open, most users choose to be closed rather than waiting), but also for the flow of SEO has a great impact, We can understand this: the speed of the Web site faster, the speed of the loading of the Web page, so that in the same time, search engine spider

Label:First, the operating system configuration optimization:1. On the network side, modify the/etc/sysctl.conf file, increase the number of TCP supported queues, reduce the resource recovery when disconnected.2. Limit the number of open files. Modify the/etc/security/limits.conf file to add a bit of content to modify the limit on the number of open files.3. Turn off firewall software such as Iptables,selinux. Second, System configuration optimization

disk.You'd better have a balance between the various parts of the computer. A good, can not improve the overall performance of the computer.NS: nanosecondsUS: microsecondsMS: MSNic and SSD almost, ordinary disk is the bottleneck, with ordinary hard disk do not use a piece, 3, 5 piecesDo site architecture: can use Cpucache without memory, a step closer, can use memory, do not use SSD can use SSD without hard disk.This is a server optimization that wil

SQL Optimization-logical Optimization-subquery optimization (MySQL) and sqlmysql 1) subquery concept:When a query is a subquery of another query, it is called a subquery (a query statement is nested in the query statement ). Subqueries are located: A) Target column position: If a subquery is located in the target column, it can only be a scalar query. Otherw