Collect diagnostic information
Several ONCONFIG parameters affect the way in which the database server collects diagnostic information. Because an assertion failure is generally an indication of an unforeseen problem, notify IBM® Informix® Technical Support whenever one occurs. The diagnostic information collected is intended for the use of IBM Informix technical staff. The contents and use of af.xxx files and shared core are not further documented.
To determine the cause of the problem that triggered the assertion failure, it is critically important that you not delete diagnostic information until IBM Informix Technical Support indicates that you can do so. The af.xxx file often contains information that they require to resolve the problem.
- DUMPDIR
- DUMPSHMEM
- DUMPCNT
- DUMPCORE
- DUMPGCORE
For more information about the configuration parameters, see the IBM Informix Administrator's Reference.
Database server administrators with disk-space constraints might prefer to write a script that detects the presence of diagnostic output in a specified directory and sends the output to tape. This approach preserves the diagnostic information and minimizes the amount of disk space used.