On 12/11/06, Steinar H. Gunderson <sgunderson@xxxxxxxxxxx> wrote:
On Mon, Dec 11, 2006 at 11:17:06AM -0200, Daniel van Ham Colchete wrote: > I just remebered one case with MySQL. When I changed the distro from > Conectiva 10 (rpm-based ended brazilian distro) to Gentoo, a MySQL > operation that usually took 2 minutes to run, ended in 47 seconds. How do you know that this improvement had _anything_ to do with the use of different optimization flags? Were even the MySQL versions or configuration the same? > This is absolutely vage. Indeed it is.
Finally we agreed on something.
> I don't have how to prove it to you. No, but you should stop making this sort of "absolutely essential" claims if you can't. > And I can't mesure how each factor helped: compiling glibc and Mysql with > good cflags, rebuilding my database in a ordered way, never kernel, etc.. Exactly. So why are you attributing it to the first factor only? And why do you think this would carry over to PostgreSQL? Remember, anecdotal evidence isn't.
But that's exactly what I said. I'm not attributing this case to the optimization factor. As I said there are a lot of factors involved. The MySQL version change of a minor upgrade (from 4.1.15 to 4.1.21). Steinar, I say I'll do the benchmark and it will be the end of the story.
/* Steinar */
