Thread:Project:Support desk/Low performance on Multiple installations on single Webserver/reply (3)

FWIW, MediaWiki's mysql db support is more performance optimized than the postgres support.

However, if I were to guess, I would say caching issues. That said, as Ciencia suggested, profiling would tell you more.

>Any out-of-the-box solutions available or can it be assumed that multiple MW installations on a single box is not a good idea.

Having multiple MW installs served from the same box should not be an issue. Lots of people set up wikifarms where all the wikis come from one box (Obviously if your site becomes super popular, you'd probably want to scale it by using multiple boxes).