wannacry impact

Another example of "12c more consumption than 10g index back-table" case, colleagues in 12c run the buffer get is very high, but in 10g run a low buffer. Doubt whether the 12c optimizer has a problem. This 10g environment and 12c environment, the amount of data is roughly the same, but there are very few differences, but this is a very small part of the difference, resulting in the NOT EXISTS subquery return different values, and then the outer query has a different

1. Test creation table variables impact on IO Before and after the test creates a table variable, the space size of tempdb is currently sized using sp_spaceused, or you can use the view Sys.dm_db_file_space_usage 14use tempdb Go Set Nocount ON Exec sp_spaceused/* Before inserting data * * Declare @tmp_orders table (list_no int,id int) Insert into @tmp_orders (list_no,id) Select Row_number () over (order by Id) List_no,id From Test.dbo.Order

Site SEO point of view is the title length will have an impact on our site optimization? The answer to this question is very certain. But the concrete should be long or short, maybe some people know very little. According to TF-IDF algorithm and hilltop algorithm, title not too long for the site's SEO benefits, but from the long tail angle analysis of traffic, title will need to contain some of our target users commonly used search terms. Of course, w

A site only crawler crawl, to be included, there are snapshots, there are rankings. So search engine crawler on the site of the crawl situation directly determines the success or failure of a website SEO. Today the author from the site itself to analyze those factors will affect the search engine crawler crawling:1, Website speed Impact crawler AccessEngine room-dns Server-cdn-egress Bandwidth--hardware-operating system-Server Software-ProgramsThe loc

First: Div+css page for spider crawl efficiency DIV+CSS Code Simplification is table can not match, even if the div CSS HTML plus corresponding CSS files are generally less than the table HTML file, Div+css realized the style and layout completely separated, the front of the garbage code a large number of reduction, the content more prominent, Let spiders crawl on your site quickly and crawl through your site in a short time. Second: Improve the speed of Web page opening All week: The client

1, 3D performance is important, but the graphics card quality is the return to the essence First of all, the graphics card's PCB substrate quality and the number of PCB layer to a large extent, determines the graphics of the good or bad. Theoretically, the more PCB layer, the more the electrical signal interference between the less, so it can make the final output of the video signal more pure. For example, if the phone is placed on the signal line of the monitor, once the phone is in a call, i

The site outside the chain with "/" and the blank grid is rarely considered by the webmaster, to the user whether the site with "/" on their impact is not big, and for the ordinary webmaster they often also ignore the site outside the chain with "/" and some of the effects of a blank lattice, in fact, the site's outside the chain of the composition of the Web site with/and without/There is a big difference , and the Web site before and after the weigh

A site can be in search engines to get a good ranking, is the webmaster long-term adhere to do site optimization results. Perhaps your website design is very good, but no good site will never be revised, some Web site revision is to enhance the user experience, some is to search engines more friendly. Experienced optimizer know that a large area of the site will be revised by the search engine down the right, the light is reduced to a certain rank, the weight is k or hair extraction. The followi

11: The process of Web page generation and its impact on performance the process of page generation The Web page generation process can be roughly divided into five steps 1. HTML代码转化为DOM2. CSS代码转化成CSSOM（CSS Object Model）3. 结合DOM和CSSOM，生成一棵渲染树（包含每个节点的视觉信息）4. 生成布局（layout），即将所有渲染树的所有节点进行平面合成5. 将布局绘制（paint）在屏幕上 In these five steps, the first step to the third part is very fast 第四步和第五步很耗时 .Rearrange and redraw When a page is generated, it is rendered at

Analysis of the Impact of MySQL transaction isolation level on its performance MySQL transaction isolation level is divided into four levels: 1. READUNCOMMITTED nbs .. Analysis of the Impact of MySQL transaction isolation level on its performance MySQL transaction isolation level is divided into four levels: 1. READUNCOMMITTED nbs .. Analysis of the Impact

Since considering the code running efficiency and performance, there are more and more considerations for writing code. For example, when should I add try/catch? Will the performance be reduced by adding too many try/catch statements? Today, I will share my views on the impact of try/catch on performance. Let's take a look at three questions: Question 1: Is the execution process different when a piece of code is surrounded by a try block and no try is

This article mainly introduces the impact of magic_quotes_gpc on unserialize in php. it analyzes the impact of magic_quotes_gpc security filtering on unserialize and its solution in the form of examples, which is of great practical value, for more information about how magic_quotes_gpc affects unserialize in php, see the example below. Share it with you for your reference. The details are as follows: Magic

, but also hand-made, it is silly, so the way to do things, 2 minutes 1.5G archive, analysis two hours, how to play?--Note: Because the log content is stored in memory, the operation session exits is lost, so here a single log mining, and then save the data to a table, completed after commit. In order to avoid the impact of the memory of the DB, the impact of performance, production library operations must

The impact of cloud computing on traditional software engineeringWhat is cloud computing? The National Institute of Standards and Technology (NIST) gives a definition: cloud computing is a pay-per-use model that provides available, convenient, on-demand network access and access to a configurable pool of computing resources (resources including networks, servers, storage, applications, services) that can be quickly delivered , with little or no manage

The impact of cloud computing on traditional software engineering140613 14231012 Li XuIntroduction of cloud computing definition, background and features Defined Cloud Computing (English: Cloud Computing) is an Internet-based computing method through which shared hardware and software resources and information can be provided to computers in various terminals and other devices on demand. Background Cloud computing is anothe

The original is: "The Impact of imbalanced Training Data for convolutional neural Networks" This blog is the paper's reading notes, there is inevitably a lot of details of the wrong place. Also hope that you crossing can forgive, welcome criticism correct. More related blog please poke: http://blog.csdn.net/cyh_24 If you want to reprint, please attach this article link: http://blog.csdn.net/cyh_24/article/details/49871387 Abstract

The state and shutdown of TCP connections and their impact on server and client 1. Status of the TCP connection let's start by describing the status of the TCP connection during the setup and shutdown process. The TCP connection process is the transformation of the State, and the factors that cause the state to transition include user invocation, specific packets, and timeouts, as shown in the following states: CLOSED: The initial state, indicating th

Let's talk about the impact of PHP on seo. the general website optimization specialist is mainly engaged in text work. As for the search engine algorithm, I don't know whether PHP has any impact on the website, you can learn some website building skills in your spare time. Sharing: Let's talk about the impact of PHP on seo. The general website optimization speci

Many users like to use thunder to download various resources, because Thunder can download resources from multiple high-speed sites at the same time through image search, so as to download resources at full speed. However, for enterprise owners/network administrators, high-speed downloading uses limited network resources and allows other users to endure low speeds while enjoying high speeds, it even affects the high speed of the entire network. However, because thunder uses the standard http pro

Iv. overall impact on the system When you write and modifyProgramIn general, because it is stored in a larger system, rather than an isolated single program, after writing or modifying, you must check the overall impact on the system. If you testCodeIf it is perfect, it can be put together with testability. That is to say, you need to write the corresponding integrated test code and pass the test. Howev