Specifies the types of messages that are recorded in the transaction log.
NONE, OK, INFO, ERRORS, ALL, status-codes, REQHDRS, RESHDRS, HEADERS
The values available include keywords that select particular types of messages, and HTTP status codes. Multiple values may be specified, separated by commas.
The following keywords control which categories of messages are logged:
NONE Log nothing.
OK Log requests that complete successfully (20x HTTP status codes).
INFO Log requests that return over or not modified status codes (30x HTTP status codes).
ERRORS Log all errors (40x and 50x HTTP status codes).
ALL Log all requests.
The following common HTTP status codes are also available. They can be used to log requests that return particular status codes:
C400 Bad request
C404 Not found
C408 Request timeout
C501 Not implemented
C503 Service unavailable
In addition, the following keywords may be used to obtain more information about the logged messages:
REQHDRS When logging requests, also write request headers to the log file.
RESHDRS When logging requests, also write response headers to the log file.
HEADERS When logging requests, also write both request and response headers to the log file (same as REQHDRS,RESHDRS).