How to improve IIS application pool availability
New guide. See how to configure your IIS application pool for maximum availability, despite recycling, startup delays, and cold start …
My first IIS guide: IISRESET, pool recycles, and site warmup
When I picked restarting IIS as the topic to dig into first, I thought this was kind of a random place to begin. Especially given how many other, seemingly more exciting things I will be talking about, including hangs, scalability, session state, async, and all the others. (To skip my rambling and go straight to … [Read more…]
Getting back to writing about IIS
I am writing down everything I know from working with thousands of IIS websites over the last 10 years.
When CPU profiling goes bad in production
This week’s How-To: recover from a failed CPU profiler that has frozen your process in production. Plus a trick to temporarily suspend/resume any process you don’t want to be running.
How-To: Remove slow Azure instances
In case you missed it, LeanSentry How-To last week was about removing slow or unhealthy Azure instances from your cloud service. It’s a relatively new technique made possible by a new Azure API, that lets you remove a specific instance of your choosing. Direct link: LeanSentry How-To: Remove unhealthy or slow Azure instances Reasons to … [Read more…]
ASP.NET Response.Flush could be breaking your site
We just announced our new expert How-To series, where we’ll be bringing you some of the best practices and techniques we’ve been using with customers. The post this week is about the Response.Flush API, a silent but deadly performance killer. Many of our ASP.NET customers experience performance degradation and hangs because of it, so its … [Read more…]
Low Pagefile can cause 503 Service Unavailable on Azure web roles
Is your Azure web role throwing 503 Service Unavailable? It could be because of a poor default Pagefile size.
New Hang diagnostics for IIS & ASP.NET apps
LeanSentry’s new Hang diagnostics are out! This was a major rewrite of the diagnostic algorithm, and a complete redesign of the interface. Some of the biggest changes are …
Re-inventing LeanSentry
Hard to believe its been more than a year since my last post! I get a lot of “Hey Mike, what have you been up to?” email from this blog and the IIS troubleshooting newsletter, so I figured I should answer this question before getting back to business as usual. The short answer is, I’ve … [Read more…]
AppliedInnovations partnership brings LeanSentry to Windows-based ecommerce sites
Pretty excited this week, AppliedInnovations just announced a partnership to bring LeanSentry diagnostics to its Windows ecommerce customers. This is a smart move, because lets face it – the worst time for your ecommerce site to go down is when its making most sales. Unfortunately, thats exactly when all the hidden application bugs and performance … [Read more…]