metadate high

The most basic function of JavaScript in a Web page is to listen to or respond to a user's actions, which is very useful. The user's action some very high frequency, some very rare. Some listener functions execute like lightning, and some heavy drag will kill the browser. In the case of the Resize event in the browser window, this event triggers once for each scale change in the browser window size, and if the listener volume is large, your browser wi

parse. Reduce the number of requests by merging JS and CSS, as well as IMG. Shorten the page load time, the main content of the page after loading completed, using AJAX to obtain those secondary files. Eighth chapter: Programming PracticeMost of the time, there is no need to use eval () and function (), so it is best to avoid using them. As for settimeout () and SetInterval (), it is recommended that you pass the function instead of the string as the first argument. There are several ways to c

data row is not. When you execute the query SELECT * from Testhash where fname= ' Peter '; The hash code is computed first, then the 3rd row pointer is found, and the value of the 3rd row is compared to ' Peter ' to determine the line to be found. 2, the limit of the hash index: A, the hash index contains only hash codes and row pointers, and No field values are stored, so the values in the index cannot be used to avoid reading rows. B, hash index data is not stored in the order of index

The following articles mainly introduce the practical operation solutions for compiling high-quality and high-performance MySQL syntaxes. We all know that the practical application of MySQL syntaxes has become more and more extensive, therefore, it is very important to write MySQL syntax with high quality and high perf

Opening overview In today's mobile internet, Internet +, the era of big data, all kinds of internet sites, platform anomalies, as springing up, there is a "suddenly like a night spring breeze, thousand tree million Tree pear blossom" feeling.For the mobile internet era of the platform, the user's sense of experience is good? Is the stability of the platform good? Estimate is for all the Internet platform two big head and other elements bar, indeed, the mobile internet era, traffic is th

Reprinted please keep Source: junlin Michael's blog (http://www.toplee.com/blog? P = 71)Trackback URL: http://www.toplee.com/blog/wp-trackback.php? P = 71 I have set up a dial-up access platform in CERNET, and I have worked in front-end development of search engines in Yahoo 3721, and have worked on large-scale processing in mop.CommunityThe architecture upgrade and other work of the maopu hodgedge, as well as their own access to and development of many large and medium-sized website modules,

High temperature Power Supply- Wuhan taikodo Software Technology Co., Ltd.The latest high-temperature power supply products, in addition, the company can also customize a variety of special high-temperature power supply modules according to customer needs, the current products include high temperature DC-DC Power Supp

Reprinted please keep Source: junlin Michael's blog (http://www.toplee.com/blog? P = 71)Trackback URL: http://www.toplee.com/blog/wp-trackback.php? P = 71 I have set up a dial-up access platform in CERNET, and have worked in front-end development of search engines in Yahoo 3721, and have also worked in MoP on architecture upgrades of large-scale community sows, at the same time, I have worked with and developed many large and medium-sized website modules. Therefore, I have accumulated some expe

I have set up a dial-up access platform in CERNET, developed it on the front-end platform of the load search engine in yahoo3721, and upgraded the architecture of large-scale community sows, at the same time, I have worked with and developed many large and medium-sized website modules. Therefore, I have accumulated some experience in large websites to cope with high-load and concurrent solutions. I can discuss this with you. A small website, such as

What about the high temperature of the video card? is the video card too hot to burn the video card? These questions about the graphics card temperature often have a lot of computer enthusiasts asked, to first find out whether the computer graphics card temperature is too high, first of all we must clearly how to view the video card temperature, not by feeling If you suspect that the computer graphics card

Tags: architecture high-load segmentation mis data volume yellow one BuildThe application scenario and solution of database sub-Library sub-tableIn a real-world business scenario, to protect the customer experience and to meet the linear growth of the business. A sub-database strategy for products that have a huge amount of data and that business will always do. However, it is very important to adopt a sub-table and sub-library strategy based on busin

1. High Concurrency Optimization analysis about concurrency Concurrency does not go because when multiple threads access a row of data at the same time, a transaction is generated so that a write lock is generated, and every time a thread that acquires a transaction releases the lock, another queuing thread gets the write lock, and QPS (query per second) and transaction execution times are closely related. The shorter the transaction execution time,

segment, and create Index on Pm_user (NAME), Oracle also assigns a segment to the index, but this is an index segment. The information for the query segment can be obtained from the data dictionary: SELECT * from User_segments. (4) Tablespace: Contains segments, areas, and blocks. The data for the tablespace is physically stored in the data file in which it resides. A database must have at least one tablespace. OK, we're back in HWM now, so what's the hig