Informix Problem

[Andre Machado_1]

Hi,
I need some information about Informix and HP-UX.

Recently we received a Superdome with 24 processors PA8900 and HP-UX 11.23 installed on it. We apply the lastest patches in this host. Our database is on Informix 7.31.

Problem: in our tests with a tablespace with 250k lines, a lot of messages with wait for mutex apears. Performance is the problem.
The same test, with another hardware RP4440, same hpux 11.23 and patches. Performance is very nice.

QUESTION: Anyone have this scenario?
Superdome - PA8900 - HPUX 11.23
Informix 7.31

Thanks.