Re: Status of MySQL on 7 w/o patches applied

On 16/10/2007, Peter Schuller <peter.schuller_at_infidyne.com> wrote:
>
> > I will endeavor to re-run these comparisons with RELENG_7 within the
> > near future (regardless of the answer to the above question).
>
> So to follow-up, with RELENG_7 the performance is now significantly
> better than 6.2 for me too. I guess it was the debugging options in
> userland. If someone wants details anyway I'll provide them, but since
> it is no longer that interesting I'm leaving it as is if no one speaks
> up.
>
> I knew about it and wanted to turn it off, but I was under the
> impression it was enabled by malloc.conf, which was non-existent,
> rather than at compile time. Also the phrasing in the recommentation
> to turn things off was such that it did not necessarily imply that
> malloc debugging was actually turned on. Or I believed so anyway in my
> possibly dream state.
>
> Would it be useful to keep a list of *all* things one needs to do to
> turn off all the debugging options and whatnot? I have always disabled
> the INVARIANTS/WITNESS stuff, but was unaware of the details of how to
> turn off malloc debugging (and I did actively look for more
> information on it, but obviously not hard enough).
>
> In the interest of benchmarks that people publish perhaps it's worth
> it to spoon feed instruction for what needs to be done, as part of the
> usual warning in /usr/src/UPDATING?
>

I was under the (incorrect?) impression that the debugging stuff would be
turned off before release.  Prior to that, 7's primary purpose is for
finding bugs before release and thus debugging options are useful.

Eric

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