Poor web serving performance

[Brad Fitzpatrick]

On Thu, 25 Jan 2007, Cal Henderson wrote:

> : And can you verify that the same number of perlbal child processes > are
> : hanging off the parent process?
>
> SERVER aio_mode         = ioaio
> SERVER aio_threads      = 30
>
> i've tried with values from 2-50 and some higher ones too - all give
> the same result. for any number of aio threads, i can only find a
> single child processes - ps, pstree and top all just show the two
> processes (i'm using IO::AIO).
>
> 16201 pts/0    Sl+    0:00 /usr/local/bin/perl ./perlbal --config=my.conf
> 16202 pts/0    S+     0:00 /usr/local/bin/perl ./perlbal --config=my.conf
>
>
> as far as i can see, IO::AIO::min_parallel(30) is being called
> sucessfully.

Sure doesn't look like it's working!  Unless it's using NPTL?  What
arch/kernel you using?

I'm on a 32-bit 2.6.11.12-xenU, and with IO::AIO with SERVER aio_threads
of 20, I see 20 child processes.

- Brad