Failed Request Tracing error LOG FILE MAX SIZE TRUNCATE

As you’ve probably read in my post AppCmd introduction and examples, AppCmd is a very extensive tool to administer Windows Server IIS hosting environments. Therefore, now a bit more about a common error message you might get using Failed Request Tracing: LOG_FILE_MAX_SIZE_TRUNCATE.

FREB error LOG_FILE_MAX_SIZE_TRUNCATE

If you’ve set up a Failed Request Tracing – also known as “FREB” – for a website in IIS, and if you’ve configure FREB with verbose information, a common error message you’ll probably get is:

LOG_FILE_MAX_SIZE_TRUNCATE

The maximum size of an FREB log file, in IIS 7+, is 512 KB per default. Once that size is reached, the log file is cut off (truncated) and a message LOG_FILE_MAX_SIZE_TRUNCATE is logged.

Did you know you can easily increase the FREB log file size server wide? The following AppCmd.exe command doubles the size to 1024 KB, or 1 MB:

AppCmd.exe set config /section:sites
 -siteDefaults.traceFailedRequestsLogging.maxLogFileSizeKB:1024Code language: JavaScript (javascript)

Interesting detail: FREB was first called Failed Request Event Buffering, and this is why the acronym doesn’t match its name in Windows Server IIS.

Show Your Support

If you want to step in to help me cover the costs for running this website, that would be awesome. Just use this link to donate a cup of coffee ☕($10 USD or €10 EUR for example). And please share the love and help others make use of this website. Thank you very much! <3 ❤️