The main machine is a dedicated server, this way we have more control over ressources and Hyperthreading is available.
For the options you are referring to, I woulk like to know what they are!
last_n? What does it do… Same for Octo?
The only things I did to help were enabling epoll and making sure that filehandles were set to 65000 or more, from the instruction on an obsure source that I can’t find anymore…
As for ressources, the main machine had low RAM useage but one CPU core was hit hard… Probably Jicofo… I don’t think it is much optimised for parallel processing. I/O was also hit hard… For the JVB machines, they were basicaly cruising all the way… Getting equal loads for the most part and barely working except for network activity. Users had reported a “smooth ride” from the early feedbacks we recieved.
I have to pull all the jicofo and atop logs to parse them on charts and make sense of it all next week… I will report on the results. (at least, I had that running!)