How to measure the quality of a CMS system

1.Floating garbage: Since the user threads are still running in the concurrent cleaning stage of the CMS, there will naturally be new garbage generated with the running of the program, and this part of the garbage has to be marked after the process, so the CMS cannot dispose of them in the collection, so it has to be left for the next GC cleanup, this part of the garbage is called floating garbage.

By default, the CMS collector will be activated when 68% of the space is used in the old age, and the trigger percentage can be increased by the value of -xx:cmsinitialoccupancyfraction, and the CMS startup threshold is increased to 92% in the middle, if the memory reserved during the CMS run cannot meet the needs of the program, there will be a "concurrent mode failure", and then downgrade to temporarily enable serial The old collector does the old garbage collection, so the pause time is very long, so setting the -xx:cmsinitialoccupancyfraction to too high can easily lead to a lot of "concurrent mode failure".

2.There is space debris: CMS is implemented based on the "mark-and-clear" algorithm, so space debris is generated.

In order to solve this problem, CMS provides the -xx:usecmscompactatfullcollection development parameter to enable the merging and sorting of memory fragments, because memory defragmentation cannot be parallelized, so the pause time will be longer. And -xx:

cmsfullgcbeforecompaction, this parameter is used to set how many times to uncompress Full GC, followed by a compressed one (default is 0).

3.Sensitive to CPU resources, the number of threads started by CMS by default is (number of CPUs + 3) 4. Therefore, a small number of CPUs will cause the execution speed of the user's program to be reduced more.

A content management system can build a unique personality. "Completely separate the template from the program" and "template scheme" are the mainstream design features of CMS, so that the template design and the program are completely separated. Designers can use different templates for each channel, column or even content page, and can modify the interface at any time, and can switch the preset template scheme with one click to change the interface.

The background management of the content management system realizes convenient, easy-to-use and user-friendly operation mode, and the web interface of bookmark management is used to facilitate switching and save the time of users and browsers. The WYSIWYG function can be directly typeset in the content management system, and it can also be processed simply. The system supports inserting flash, audio, **, hyper links, special characters, and so on.

The content management system uses role-based user management, and by adding users with different permissions, you can assign one administrative right to different users. By establishing user groups with different management rights, users can be divided into a variety of levels: super administrators, column administrators, document entry clerks, auditors, etc.

1. CMS, Content Management System, i.e. Content Management System.

2. It is a generic or general term for a system with content management functions. It does not refer to a system, as long as it has content management functions, it can be called a CMS.

3. CMS is divided into typical and atypical, and no matter how large the system is, it also has the component of CMS, which is not called CMS, that is, atypical. Like the publicity class of enterprises, its main function is to update some announcements, product information and other typical content information, which is called CMS in the common sense, that is, typical.

4. The auto-generated web page you mentioned refers to a template generation system that can dynamically generate CMS systems, such as Imperial CMS and Discuss!Wait.

Now I guess I can understand.

Therefore, the CMS can be made into news (portal**), blog (personal**), forums, etc., and even some manufacturers can strengthen it on this basis and can be built into **** (commodities can also be regarded as articles).

CMS is short for ContentManagementSystem.

To put it simply: a CMS is a content management system.

A content management system is to separate the content (text, etc.) from the components of the content, which can connect the pages together, and Huiqianzhi can control the display of the page. Through this system, it is easy to manage, publish, and maintain the best content, and there is no longer a need to write HTML or manually build each page.

What are the advantages of a CMS? Where can it be applied? In the field of CMS, there are many advantages in all aspects of the front consumption, in the first Internet, school Internet, commercial door regret guess household, information port, local portal network, and other design to the construction of article publishing and management.

CMS is a general term for the content management system, and each ** has a backend to manage and maintain the front-end content and performance layer, which we can also call CMS.

At present, the main popular CMS is Weaving Dreams, Empire, Chasing Waves CMS, PHP168, etc., Empire, Weaving Dreams This small CMS is fast to use, but there are more loopholes such as circles, such as for practice is optional, PHP168 is not suitable for responsive development, mobile Internet era, responsive development is the general trend, and it is also a necessary consideration for the construction of money. The Wave CMS is based on: Net development, the system function is strong, the secondary development ability is strong, the background supports data backup, model creation, wireless nodes, unlimited authority management, service projects have large portals, tertiary hospitals, all kinds of universities, WeChat, small program development and other capabilities, and the background can be directly connected to the WeChat ability, so that the login and which background, you can manage WeChat fans, content and other operations.

How to choose a CMS system to make a ** look that suits you.

** of pure HTML (static) pages.

Requirements: They are all static pages, there are not many product catalogs (you can make pages by hand), and the updates are not frequent.

endThere are not many static pages + dynamic pages**.

Blogs & Personal**.

END portal type (B2B industry**).