Passenger architecture

[zellster]

FYI: http://www.modrails.com/documentatio...0overview.html

A different approach to spawning and managing Rails instances. Not sure how it performs in practice, but the memory savings could be interesting.

[mistwang]

It is similar to what LiteSpeed has done for years.
They have to fix the copy-on-write problem in Ruby VM to save memory, and ruby-lsapi will save memory too with the patched Ruby VM.

[malffred]

Would it be possible to use the patched "Ruby Enterprise" VM the Phusion guys have with LiteSpeed and get the same memory improvements? Or would ruby-lsapi completely die?

If so, is that something you've done or recommend? I haven't tried it personally yet but haven't heard any problems in general about their "Ruby Enterprise" patched VM.

[mistwang]

We have not tried it yet, but it should work well with LiteSpeed based on their claim. You may need to patch lsws/fcgi-bin/RailsRunner.rb by adding

if GC.respond_to?(:copy_on_write_friendly=)
    GC.copy_on_write_friendly = true
end

at the very beginning in order to fully take advantage of it.
Please let us know the result if you give it a try.

[fantasydreaming]

I'm considering adding it to my sites, and wanted to check if anyone ran into any problems.

[andreas]

I got segfaults with the patched ruby.