Preallocating a sufficiently large dump data set

Because you are dumping multiple address spaces, multiple data spaces, and multiple storage data areas, you might need a much larger dump data set defined than is normally used for dumping a single address space. You should preallocate a very large SYS1.DUMPnn data set.

SDUMP has a limit on how much storage it allows in a single dump. It is called MAXSPACE. To determine the current value of MAXSPACE, issue:

D D,O

The default value is 500 megabytes. To change this value, issue:

CD SET,SDUMP,MAXSPACE=nnnnM

Tip: In a large server environment, you might need to increase MAXSPACE to 2000M (2 gigabytes) or more.