In "Appendix E. Threaded Applications with Concurrent Access", Note 2 should now read:
2. By default, AIX does not permit 32-bit applications to attach to more than 11 shared memory segments per process, of which a maximum of 10 can be used for local DB2 connections.
To use EXTSHM with DB2, do the following:
In client sessions:
export EXTSHM=ON
When starting the DB2 server:
export EXTSHM=ON db2set DB2ENVLIST=EXTSHM db2start
On EEE, also add the following lines to sqllib/db2profile:
EXTSHM=ON export EXTSHM