Could we get a Apache/Pg test in which the ext4 is set to the "unsafe" mode similar to etx3 level?
That way we could see if it's about etx4 or something else also.
I'd like to see how Cherokee fares compared to Apache in these tests. It generally tends to be faster than lighthttpd (which in turn is much faster than Apache).
Well, I use Ubuntu for the server I administer since version 7.10 and it has always been very reliable (well, except when I had to use experimental git code and -rc kernels to get what I wanted, but that's not Ubuntu's fault). Given these results, I think I'll keep ext3 (over lvm over raid1) until btrfs is stable.
Well, maybe just start by installing the Ubuntu Server Edition instead of the Desktop Edition? What the benchmark has told me so far is, that the desktop crew did a extraordinary job (I do not run a production mode HTTP server on my desktop, just my development environment.. and with that I do not need thousands of request per second).
The Server Edition has a specially optimized kernel for server usage. The desktop edition ain't. You know, that's why it's called desktop edition.
Launchpad bug report: https://bugs.launchpad.net/bugs/567302