This boolean variable controls the automatic appending of the process ID number to the log file name. Set the value to 1
to enable appending, or 0
to disable. By default, appending is off.
IRISODBCTRACE (UNIX® Only)
This variable controls whether the log also includes threading information. Set the value to 1
to enable inclusion of threading information, or 0
It can be useful to enable this additional kind of logging, if you need to debug a threaded application. However, it adds many extra lines to the log for most ODBC applications.