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Tag Archives: iis
A powershell script for running reverse lookups on many IP addresses at once
I often find myself looking at web logs when researching anomalous traffic on our servers. It’s not uncommon for a poorly written web scraper to come through the system and generate spurious errors, and I start looking at what IP … Continue reading
Posted in Uncategorized
Tagged akamai, debugging, DNS, iis, ISP, powershell, routing, tomcat
17 Comments
Performance: generate web traffic load using a powershell script
The other day, I found myself wanting a quick and dirty way to throw a controlled amount of load against a server for the purpose of tuning some thread settings. What I wanted was to simulate varying numbers of concurrent … Continue reading
Debugging: Use Fiddler and WebProxy to debug HttpWebRequest / HttpWebResponse issues in ASP.NET
We recently found ourselves debugging code that was making web requests to another server. If we hit the server manually in a web browser, it worked fine, but when we ran it through the code simulating the request using HttpWebRequest, … Continue reading
Performance: Yes, time-taken in IIS includes network time
I’ve written previously about many of the useful types of analysis you can perform using the time-taken field in your web logs. However, I would be remiss for not pointing out some limitations of the data it provides. When poring … Continue reading
Solved: ASP.NET Web Services using POST only work on localhost by default
This information isn’t exactly secret, but it took a bit of googling around to piece the answer together, so I wanted to share it in a more condensed form. We are in the process of migrating some legacy ASP … Continue reading
Kick off a Cygwin script from a windows bat file with a different working directory
I recently created a script that would pull the Tomcat log files from a group of web servers and then run my 95th percentile awk script to generate a summary of response times for the 100 most popular pages. I … Continue reading
Performance: Hyper-threading actually does boost server capacity
We recently noticed some odd behavior with one of our servers during a deployment. Several machines were removed from the traffic pool to receive updates, and during this time, the other machines were shouldering the extra load. We have significant … Continue reading
