I just realize that IIS logs only record from 4:00 am until 5:00am or so. After checking most of my site logs. I now know the lots of logging is missing. most of the site (those busy) starts logging at 4:00 and stop 1 or 2 hours later. some other logs only have a couple of hours?

Any clue why this? can there be a log size limit somewhere?

Ho here is what i found.

LogBufferSize
Registry Path: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Http\Parameters\LogBufferSize
Data Type: REG_DWORD
Default value: N/A
Range: 12,288 - 65,536 (12K - 64K)
Overrides the default logging buffer (per site) of 64K. Using this key, administrators can prevent exessive memory usage when running many thousands of sites on a server. This registry key does not exist by default and must be added to the registry.


But it doesn't exist by default so it shouldn't be a problem?

Is bump allowed?