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In troubleshooting an issue with a web service, I need to examine the HTTP log created by IIS 6 on a Win2003 box. As I'm sure you are aware there is a log buffer that prevents writing to file every request for the sake of performance.

Can this HTTP log buffer be manually flushed, or temporarily disabled so each request is written to the log file in real-time?

I realise than on IIS 7 you can do a netsh http flush logbuffer. This does not work for 2003/IIS6.

Additionally, this is a production box so I can't restart it, rendering the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\HTTP\Parameters\DisableLogBuffering reg key hack (http://www.it-notebook.org/iis/article/flush_log.htm) ineffective.

Chris Pickford
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You're probably long past this issue, but if anyone stumbles across this in the future, you may have luck by adjusting the log file rollover schedule--since IIS will switch files, it will have to flush.

James
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  • How exactly do you adjust the log file rollover schedule? You should include details in your answers rather than 1 sentence suggestions. – fukawi2 Dec 13 '14 at 06:27
  • The log file rollover settings are in IIS Manager behind the 'Logging' icon--far more easily accessible than ’netsh http flush logbuffer’ which I have never heard of. This isn't a technically challenging answer, more of a trick that people might not think of. – James Dec 13 '14 at 16:28