The type of diagnostic errors recorded in the error log file is determined by this parameter. Valid values are:
0 - No diagnostic data captured
1 - Severe errors only
2 - All errors
3 - All errors and warnings
4 - All errors, warnings and informational messages
It is the diagpath configuration parameter that is used to specify the directory that will contain the error log file, event log (on Windows NT only), alert log file, and any dump files that may be generated based on the value of the diaglevel parameter.
Recommendation: You may wish to increase the value of this parameter to gather additional problem determination data to help resolve a problem.