« Previous Next »

• 04-02-2009, 1:10 PM

  marcoshaw Joined on 04-16-2008, 12:47 PM Posts 26

  Moving a old 32-bit ISAPI DLL to 64-bit Reply Contact I'm going to be working with someone who has a 32-bit ISAPI DLL (apparently written in .NET 1.1, and not sure if it is coming from Server 2000 or 2003). They got a brand new Server 2008 64-bit system, and have tried using the same ISAPI DLL on the new platform. Unfortunately, the performance of their application (using the ISAPI DLL) has gone from a response time in the 20 ms range (on the old platform) to now being about 3 secs (on the new system), and that is a big issue for them. I haven't seen the source for the DLL yet (and not even sure they still have it), but does anyone have any troubleshooting tips they can pass along?

  Tags: isapidll64-bit32-bit

• 04-02-2009, 1:19 PM

  In reply to

  anilr Joined on 05-23-2006, 6:13 PM Redmond, WA Posts 2,343

  Re: Moving a old 32-bit ISAPI DLL to 64-bit Reply Contact You can start with failed-request tracing to see if you see anything obvious there taking a long time.  Otherwise, your best bet is probably to use the visual studio profiler to profile the application under load.  You will probably need symbols for the dll to analyse the profile however. Anil Ruia Senior Software Design Engineer IIS Core Server