The buffer can be increased by changing the AspBufferingLimit setting in Metabase.xml to a larger size. The default value is 4194304, which is about 4 MB.
IIS 6
* Stop IIS
* Locate the file %SYSTEMROOT%\System32\Inetsrv\Metabase.xml
* Modify the AspBufferingLimit value
* Restart IIS
IIS 7 (or higher):
* Open Internet Information Services (IIS) Manager
* Locate the Web Site or Virtual Directory running EventSentry
* Click the ASP Feature
* Increase Limits Properties > Response Buffering Limit
* Restart IIS