Regular time intervals

Select this option to log an event when a worker process is recycled at a specified time interval. This option is available only when the Regular time intervals (in minutes) option is selected and a time interval is specified on the previous wizard page.

Virtual memory usage

Select this option to log an event when a worker process is recycled after using a specified amount of virtual memory. This option is available only when the Virtual memory usage (in KB) option is selected and a number of kilobytes is specified on the previous wizard page.

Number of requests

Select this option to log an event when a worker process is recycled after reaching a specified number of requests. This option is available only when the Fixed number of requests option is selected and a number of requests is specified on the previous wizard page.

Scheduled time(s)

Select this option to log an event when a worker process is recycled at a specified time. This option is available only when the Specific time(s) option is selected and a time is specified on the previous wizard page.

Private memory usage

Select this option to log an event when a worker process is recycled after using a specified amount of physical memory. This option is available only when the Private memory usage (in KB) option is selected and a number of kilobytes is specified on the previous wizard page.

On-demand

Select this option to log an event when you recycle a worker process by using IIS Manager or Appcmd.exe to correct a problem.

Configuration changes

Select this option to log an event when a change to configuration causes the application pool to recycle.

Unhealthy ISAPI

Select this option to log an event when an ISAPI extension reports to the worker process that it is unhealthy.