[MOSS/WSSv3] Error "Unable to get the private bytes memory limit for the W3WP process."

[ISSUE]
On the environment of a customer we encountered a lot of errors in the event log, which also caused some performance issues. The message was:
"Unable to get the private bytes memory limit for the W3WP process. The ASP.NET cache will be unable to limit its memory use, which may lead to a process restart. Error 0x80070005".

[CAUSE]
The message is caused by a known issue with insufficient permissions in your IIS metabase. The metabase ACL's on the target server did not include the IIS_WPG group on the following two nodes of the metabase (IIS_WPG is in both ACL's on a clean install):
- W3SVC/AppPools
- W3SVC/Filters

[SOLUTION]
Download the MetaACL utility from KB267904. When you have downloaded and installed the program, run the vbs via the following command:

cscript metaacl.vbs IIS://Localhost/W3SVC/AppPools IIS_WPG RE

The path is case sensitive - type exactly as above; after you run this command restart the IIS services and see if this corrects the problem.

Source

[MOSS/WSSv3] Large log files with default logging options

[ISSUE]
When you configured the SharePoint logging as default, it is very much possible that the logs are filled with "Preserving template record with id....." messages. You would expect these messages only to be logged when logging is set to Verbose mode.

[SOLUTION]
The question how to solve this issue has been asked a lot on the Internet, for example on the MS Forums. Unfortunately nobody had a real answer. But since a couple of months, Microsoft fixed this issue. The April Cumulative Update now contains a fix for this issue:

When you set the least critical event to report in the Event log to ERROR, and you set the least critical event to report to the trace log to MEDIUM, the following messages are logged in the Unified Logging Service (ULS) logs:
Preserving template record with size…
Deleting template record with size…
However, you only expect these ULS messages to appear if the logging level for General is set to Verbose.

Just install this update and you are good to go!!