DUMPSHMEM (UNIX)

onconfig.std value

1

range of values

0 = Do not dump shared memory.
1 = Dump shared memory.

takes effect

When the database server is shut down and restarted

refer to

Collecting diagnostic information in the chapter on consistency checking in the IBM Informix Administrator's Guide

DUMPSHMEM indicates that shared memory should be dumped on an assertion failure. All the shared memory that the database server uses is dumped; it is probably quite large. The shared-memory dump is placed in the shmem.pid.cnt file in the directory that DUMPDIR specifies.

The pid value is the process identification number for the virtual processor. The cnt value is incremented each time that this virtual processor encounters an assertion failure. The cnt value can range from 1 to the value of DUMPCNT. After the value of DUMPCNT is reached, no more files are created. If the database server continues to detect inconsistencies, errors are reported to the message log (and perhaps to the application), but no further diagnostic information is saved.