Hello,
Here is a little status update:
If you compile PostgreSQL 9.2.7 on AIX 7.1 TL2 and then copy the
binaries to a AIX 7.1 TL3 everything is fine - no hangs.
It does look like the C/C++ compiler (same version/patch level) is
producing a working binary on AIX 7.1 < TL3 and failing one on AIX 7.1 =
TL3 (latest OS level available).
Currently the IBM kernel development support is analyzing the problem.
Bye
Rainer