A website was running on an IIS server 7.0 / Windows 2008. A new server was set up, running IIS 8.5 / Windows 2012, with more powerful hardware (4 CPU cores). However, performance of a new server is dramatically low.
Application is ASP classic. What I noticed is that VBScript-intensive code totally blocks other requests! For example, I have a page that loops for ~100000 records. It takes about 20 seconds to do that. During that period other requests, even for static resources, are waiting.
Unfortunately, server is being managed by someone else and I have no access to logs or performance monitors.
What could be the source of the problem?
Saturday, February 17, 2018
iis 8.5 - Slow IIS performance after upgrade from 7.0 to 8.5
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