TAILIEUCHUNG - Thiết kế web với joomla 1.6(5).x part 73

Sử dụng tùy chọn thanh trừng Cache hết hạn có lợi thế là không gây ra một nhúng trong việc thực hiện trang web đầu cuối. Nếu trang web của bạn nhìn thấy lưu lượng truy cập lớn, sử dụng tùy chọn Clean Cache có thể gây ra một dip hiệu suất bởi vì hệ thống phải xây dựng lại bộ nhớ cache sau khi lực lượng này đổ các tập tin. | Chapter 26 Managing Performance and Accessibility To purge the expired cache files follow these steps 1. Log in to the admin system of your site. 2. Click on the Purge Expired Cache option under the Tools menu. The Cache Manager -Purge Cache Admin screen loads in your browser. 3. Click the Purge Expired icon. The system immediately deletes the cache files. Note Using the Purge Expired Cache option has the advantage of not causing a dip in the front-end site performance. If your site sees heavy traffic using the Clean Cache option can cause a performance dip because the system must rebuild the cache after you force it dump the files. Purge Expired Cache only kills off the expired files leaving the current cache files untouched. Typically this is only an issue if your site has numerous users active at the time you decide to clean the cache. Improving Content Performance Everything that is on the pages of your web site has an impact on the site s performance. If you build large pages with large files the page loads more slowly than a smaller lighter page. While the pages your Joomla site generates from components are largely beyond your control you can have a significant impact on your articles pages. If you work smart and keep in mind the need to build lean pages you can serve web pages to your visitors more quickly and also reduce the burden on your server. Never forget it all adds up. If you have multiple visitors on your site simultaneously the page each is viewing contributes to the load. Saving a few kilobytes in file size here and there can add up quickly. The following sections explain the issues you should consider when creating content for your site. Avoid large files Large file size is most commonly an issue with graphical files inserted into articles. Optimize your images to keep file sizes down to reasonable levels. As image file size is at least partially a byproduct of the physical dimensions of the image files width and height it is hard to say what is

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