(In reply to Reinhard Max from comment #9) > None of the PostgreSQL packages on openSUSE or SLE has a constraints file. Then SUSE has got larger VMs as a default for building packages. The smallest openSUSE building instances have got 4GB of memory. I have to say, that there is an open bug report because of the double memory usage with GCC on the mainframe: https://bugzilla.opensuse.org/show_bug.cgi?id=1188441