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step. This step consumes more time in large-capacity tables, that is, deleting physical files on the OS. As we all know, rm a gb file on ext3 is very time-consuming. This is caused by the Data Structure Stored in ext3. If a large file is stored, the I _block of ext3 cannot be directly stored, multi-layer Nesting is required for full storage. In this case, many ing layers and multi-layer ing won't be stored sequentially, resulting in a large random IO, this results in a very slow process of dele

Introduction: Browser rendering has a great impact on performance, especially in the mobile page, on the macro, we can refer to Yahoo that 20 of the military to operate, but at the micro-rendering level, there is not a set of relative molding theory as the basis.This article is just a tip, take everyone into the micro-optimization field, the actual rendering optimization of this piece, there are many techniques and methods need to dig. This article is

Cables can be used as data and power pipelines for about 15 years, which means that the cabling system has a huge and long-term impact in your storage environment. This article describes whether to select optical fiber cables or copper cables. How long will you use a data storage system? From a positive perspective, it usually takes six years. The average service life of the server is four years. What about the data center cabling system? Cables ca

In the previous article "Smarty on the impact of Web page performance", the default does not open Opcache, so I installed a zend opcache extension, re-experiment, the results are as follows:Have SmartyUsing Apache's AB command for stress testing, concurrent with 10, is not large, while using the SAR command to calculate the CPU utilization. The command is as follows:./ab-c 10-n 100000 http://cq01-rdqa-dev072.cq01.baidu.com:8008/index.phpSar-u 2 >/tmp/

Analysis of the Impact of DIV + CSS layout websites on website SEO websites that comply with the XHTML standard DIV + CSS layout. The following describes the impact of SEO. Simplified code Using DIV + CSS layout, the page code is simplified, and I believe I know all about XHTML. There are two direct benefits of code streamlining: first, improving spider crawling efficiency and crawling a complete page in

What is the impact of using multiple IDs on a single page? when defining a style in a style sheet, you can define IDs or classes, for example: ID method: # test {color: #333333}, called on the page Content CLASS Method:. test {color: #333333}, called on the page Content Id: a page can be used only once, and the class can be referenced multiple times.Some netizens asked, the id and class seem to be no different. I used multiple IDs on the page

A recent project requires UDP to send broadcast packets to embedded programs and require them to provide corresponding feedback, which was very smooth at the beginning. However, at the universal test stage, we found that some computers could not send UDP broadcast packets, that is to say, it is impossible to interact with the embedded end (it has been a lot of effort to discover and lock the problem here! It takes a long time to ping the embedded terminal ). After the problem is locked, the firs

Before chatting with colleagues, mentioned this hardware aspect (including memory, CPU, and hard disk storage choice), personally think can improve the performance of the underlying hardware from these aspects, thus improve the overall throughput and speed of the website.A. Host:(1). CPU: Determines the processing speed, the good CPU can speed up the computation time of the whole program, is the server can respond to requests more quickly.(2). Memory: The use of large-capacity memory, can effect