CMS

Watch out for Singletons

If you are a seasoned Episerver developer, you should (and probably, already) know about the foundation of the framework: dependency injection. With the Inversion of control framework (most common, Structuremap, but recent versions of Framework Read more

vimvq1987
CMS

Adding backslash ending to your URLs by UrlRewrite

It's generally a best practice to add a backslash to your URLs, for performance reasons (let's get back to that later in another post). There are several ways to do it, but the best/simplest way, IMO, is using UrlRewrite module. In most of the case, processing the Urls before it reaching the server code will be most effective, and here by using UrlRewrite we trust IIS to do the right thing. Our application does not even need to know about it. It's also a matter of reusable. You can simply copy a working, well tested rule to another sites without having to worry much about compatibility. Before getting started, it's worth noting that UrlRewrite is an IIS module which is not installed by default, if you want to use it, then you would have to install it explicitly. Download and install it from https://www.iis.net/downloads/microsoft/url-rewrite . And then we can simple add rules to <system.webServer><rewrite><rules> section in web.config. For the purpose of this post, this rule should be enough: [crayon-5b21b008a9401625618313/] If you are new to UrlRewrite, may be it's useful to explain a bit on the rule. Here we want to add a rule which matches every url, except the urls which already end with backslash (/) already. (more…)

vimvq1987
CMS

Maintaining your indexes

Indexes are crucial to SQL Server performance. Having the right indexes might make the difference of day and night with your application performance - as I once talked here. However, even having the right indexes is not everything. You have to keep them healthy. Indexes, as any other kinds of storage, is subjected to fragmentation. SQL Server works best if the index structure is compact and continuous, but with all of the inserts/updates/deletes, it's inevitable to get fragmented. When the fragmentation grows, it starts affecting the performance of SQL Server: Instead of having to read just one page, it now have to read two, which increases both time and resource needed, and so on and so forth. (more…)

vimvq1987
CMS

Episerver caching issue with .NET 4.7

Update 1: The bug is fixed in .NET 4.7.1 (thanks to Pascal van der Horst for the information) Update 2: The related bug is fixed in CMS Core 10.10.2 and 9.12.5. If upgrading to that version is not an option, you can contact Episerver support service for further assistance. Original post: If you are using Episerver and update to .NET 4.7 (even involuntarily, such as you are using DXC/Azure to host your websites. Microsoft updated Azure to .NET 4.7 on June 26th) , you might notice some weird performance issues. If your servers are in Europe, Asia or Australia, then you can see a peak in memory usage. If your servers in North America, then you can see the number of database calls increased. In both cases, your website performance is affected, the former can cause your websites to constantly restarts as memory usage reaches a threshold limit, and even more obvious in the latter. Why? It was a known issue in .NET 4.7, as mentioned here: https://support.microsoft.com/en-us/help/4035412/fix-expiration-time-issue-when-you-insert-items-by-using-the-cache-ins (more…)

vimvq1987
CMS

Episerver CMS performance optimization – part 1

Update: In Episerver CMS 11, released today (November 21st 2017), the simpleaddress router has been moved to the last of the route table. Original post: This is an unusual post - it is not about Commerce - my area of expertise, but about CMS. Recently I've been working on some support cases where SQL Server instance is on high utilization, and in some scenarios it eventually slows down the site. After investigation, it's likely to come from a small, simple and helpful feature: Simple address. CMS content can have a property named "Simple address", which allows you to create a "shortcut" url for that content. So if you have one page with "name in url" as "contact-us" under a page name "about-us" under Home page, you can access it via https://mysupercoolsite.com/en/about-us/contact-us. Or you can set the Simple address for that page as "contact-us", and then you can access it directly via https://mysupercoolsite.com/contact-us. (more…)

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