When the engineers on the ASP.NET/.NET Core team talk to real customers about actual production problems they have, interesting stuff comes up. I've tried to capture a real customer interaction here without giving away their name or details. The team recently had the opportunity to help a large customer of .NET investigate performance issues they’ve been having with a newly-ported ASP.NET Core 2.1
![Customer Notes: Diagnosing issues under load of Web API app migrated to ASP.NET Core on Linux - Scott Hanselman](https://cdn-ak-scissors.b.st-hatena.com/image/square/42dc254d379d8c2d78c06dcf93e1fd22303ed9d5/height=288;version=1;width=512/https%3A%2F%2Fwww.hanselman.com%2Fblog%2Fcontent%2Fbinary%2FWindows-Live-Writer%2F3c8a4b3e12ce_F6C8%2Fimage_ae919b7e-d5b8-43f7-8133-73365538a123.png)