Drupal 6 performance

If you're not a native English speaker doing Drupal, then the i18n module is probably the only way. This is why it seems very strange to me that the performance admin page says that i18n might not work with aggressive caching.

I find it hard to believe that multilingual drupal sites scale worst or harder than sites with one language.

scale worst/hard = scale without advanced caching

Is there anyone with experience using the i18n with aggressive caching?

I think this discussion about server configuration may benefit many. I know it will benefit me.

The facts:

• Ubuntu 9.x on Linode VPS, 540MB RAM
• Aegir
• 50 small sites that get a couple of visits every hour
• a few busy sites that should be able to handle a spikes of, say, 30 concurrent users
• a moderate dose of "module-itis"
• mostly anon users - say 90%
• content and login is not shared between many sites, but a few may use Domain module (or similar)
• using Pressflow

Drupal 6 Performance Tips, by Trevor James and TJ Holowaychuk, is a newly-published title from Packt Publishing aimed at Drupal beginners, developers, designers, and webmasters who utilize the Drupal content management system to create robust websites.