Installing under Aegir
The system requirements for installing OpenAtrium 7-x.2-x via Aegir may be even higher than those listed on the main OpenAtrium install page
In addition to the normal Drupal 7 requirements:
memory_limit
(in php.ini) must be at least 256Mmax_allowed_packet
(in my.cnf) size must be at least 32MOn a production Open Atrium site, keep in mind that the nature of collaboration software implies many logged-in users. Caching layers, such as Varnish, that are typically used to improve Drupal performance will be less effective because authenticated users bypass these caching layers. Thus, a production environment may require additional database memory and resources to handle larger numbers of users. Using a hosting company specifically tailored for Open Atrium can also help. You should not expect to run Open Atrium effectively on minimal (cheap) shared VM hosts.
Please also see Additional OpenAtrium requirements when installing under Aegir.
The system requirements for installing OpenAtrium 7-x.2-x via Aegir may be even higher than those listed on the main OpenAtrium install page