VDS Sphera Knowledge Base
My pages load slowly, what causes this?
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We run very powerfull Dell enterprise servers and constantly monitor server activity and bandwidth usage so that the server speed and bandwith are never a bottleneck. Furthermore, in the rare case that there is server performance issue, we generally hear about it from dozens of clients right away. Consequently, in nearly all cases of slow pages, there is something in the site itself that is not optimized for speed.
Here are the most common causes of slow pages.
- Links to other web sites. If you are getting content or images from other web sites, your site will always be much slower than if you had all image files stored on the local server. It takes SEVERAL TIMES longer to get content/images from a different site than it does if they are local. Minimizing references to other sites is often the difference between a very fast site and a very slow site.
- Images are too big. Make sure that your graphics/images are as small as resonable for your site. Check the byte size of your images to make sure none of them are too big for quick downloading. Also, keep the number of graphics/images to a practical minimum.
- Database lookups are not optimized. Sites that generate pages dynamically from databases (Image Galleries, e-Commerce sites) must make sure that SQL queries are optimized. Webmasters often forget to add indexes to their databases which results in slow queries and slow pages. Also, make sure that you keep your database as small as possible.
To fully optimize a particular page, start out with a blank page, then add one thing at a time (such as an image or link to another site or a script) then test your page for speed. If you do this you will find exactly what is slowing your page down.
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