| ylbtech-Terms-Computer-Performance: Concurrency |
The number of concurrency, computer network terminology, refers to the number of simultaneous access to the server site .
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- Chinese name: Concurrency
- Foreign name: concurrency
- Sexuality: Technology
- Category: Computer
Because the virtual host is built on the basis of multiple users per server, that is, multiple users use a server together
.
In order to avoid a link to a number of IIS user on the same server as the server too much or take up too many resources and affect the normal use of other users
, so all
virtual space
providers for
a single user IIS number of links occupancy, traffic and server processes the ratio of the CPU
has been
correspondingly restricted
. When a user's site exceeds the settings on the server, the server will be busy when visiting the site, or there are too many people visiting the site, and the related error prompts that exceed the WEB processing capacity.
What should I do after the above prompt appears on the user's site?
First, check whether your site has a large number of visitors. If there are indeed many people visiting online, then the only solution is to propose to the space provider to upgrade your space to accommodate more people to visit your site;
Second, if you feel that the number of people on the site should not exceed the set limit, then you should check the content on your site for pictures, flashes, music, downloaded files, movies, etc.
Hotlink
use! In general, this situation occurs in many sites with a small number of visitors, mostly caused by someone else's stolen links. If you find a suspiciously stolen link file, please delete or replace the directory.
Third, check the rationality of the site's webpages,
because the number of IIS links is calculated according to the IE screen, that is, within the same IP, if you open 10 webpages at the same time, then IIS is regarded as 10 links
, or you The web page uses a frame structure, then there are several frame pages in this page, that is, the number of IIS links. If this is the case on your web page, the following improvements are recommended:
1. Try not to use the frame structure of the web page; 2. Try not to use the link of the newly opened window, so as to avoid visiting users to open many web pages at the same time, resulting in a waste of the number of IIS links
.
Fourth, check whether your site has an executable text page with high CPU usage (generally refers to ASP, JAVASCRIPT, PHP, CGI and other web pages). If you are using an ACCESS database, the database query will be performed after the general database capacity exceeds 5M. At this time, the CPU usage will be very high, easily causing the CPU usage rate to exceed the set limit. It is recommended that you optimize the program structure and optimize the program execution statement. If the ACCESS database is relatively large, it is recommended to use a SQL database!
Fifth, check whether there are large pictures, FLASH, music, movies and other files on your website. For example, there are not many users visiting a certain site, and the number of
IIS links
may be only dozens, but he uses it on the web page. In order to enhance the effect of the web page, a larger FLASH or picture (such as more than 300K) may be used. As a result, it may become inaccessible. The reason is that the traffic (
bandwidth
) usage of the site exceeds the limit, so it is recommended to use small file, so that can avoid
traffic overload
, can also increase the download speed of the client, give customers a better feeling!
Finally, please note: the server's default timeout for a link is generally 15--20 minutes, that is, when the visiting user visits your web page and closes, it generally takes 15--20 minutes before the server removes it from its memory Clear deemed
invalid link
!
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Author: ylbtech Source: http://ylbtech.cnblogs.com/ This article belongs to the author and blog Park total, welcome to reprint, but without the author's consent declared by this section must be retained, and given the original connection in the apparent position of the article page, otherwise Reserves the right to pursue legal responsibility. |