Elbe 2.2 requests more memory for PostgreSQL clusters than 1.2 did

[manut]

Building a wheezy image with elbe 2.2 results in a different PostgreSQL cluster configuration than with elbe 1.2. In particular the
+shared_buffers setting in /etc/postgresql/9.1/main/postgresql.conf differs - with elbe 1.2 it used to be:

shared_buffers = 24MB

while with elbe 2.2 it is:

shared_buffers = 32MB

The increased amount of shared buffer memory requested by PostgreSQL cannot be allocated on my hardware (existing product, which we still need to support) and
+the RDBMS fails to start.

Long story short: same XML, same build machine, same target device, different elbe version -> product broken.

This has probably something to do with the fact, that elbe 2.2 creates a Debian 8 (jessie) initvm while the 1.2 does Debian 7 (wheezy). Note, that the
+PostgreSQL conffiles in /etc/postgresql/ get generated upon package installation, so obviously some maintainer script works differently when run in chroot on
+Debian 8 and 7 - maybe the postinst script gets something from the host's environment that chroot cannot hide?

Any idea how to fix that?

Thanks & regards,
Lukasz

[bgermann]

We will not change specific Debian package configurations via Elbe.