FreeBSD MySQL still WAY slower than Linux

[Michael Schuh]

Hi,

i wouldn't start a principal discussion, but i have too?

I have one Machine! and on this machine with identical Hardware,
identical real! not same not side by side, real the same disk,
processor, ram, board......
--> read my other postings, it's recommendet.....

on this machine i have made 4 installations on same disk,
of 4 types/Versions of Os'es
1: RELENG_4
2: RELENG_5
3: Drangonfly_REL_1.2
4: GENTOO_2005_02

The disk was alway same partitioning:
first 1G for Swap
rest for system
then i login in the system and made:
# cd /; /usr/bin/time dd if=/dev/zero bs=1024 count=1024k of=zerofile;
rm zerofile

then i install the next system from a dump on same disk....

so that i can compare the time-consumption on these 4 systems.
i think dd ist not the best for performace-tests or something else,
but dd is a handy tool for quick test what's going on with your system
write/read-speedness.

so other people have suggested me that dd was not everytime writes to
the same parts of diske, while the underlying fs-drivers made other
steps on other systems ( and other fs-types)

I would only compare the performace from 2 Versions of FreeBSD, while
i mean that the performance from RELENG_5 is more slower than under
GENTOO and it is double as slow as under RELENG_4.

i would not test the performance of my system, i would only compare.....

best regards
michael
2005/6/28, Daniel O'Connor <doconnor at gsoft.com.au>:
> On Tue, 28 Jun 2005 20:43, Roman Neuhauser wrote:
> > # doconnor at gsoft.com.au / 2005-06-28 19:04:18 +0930:
> > > On Tue, 28 Jun 2005 18:51, Roman Neuhauser wrote:
> > > >     No you don't. You want to make a side-by-side comparison
> > > >     of two products, and if one of them underperforms, it just
> > > >     underperforms. You cannot use a poor location selection
> > > >     strategy in the driver as an excuse for poor operation.
> > >
> > > dd is a useful start, but you shouldn't read too much into the results
> > > since, in general, dd doesn't reflect real world usage patterns.
> >
> >     Huh? Various people have reacted to the "dd doesn't reflect real
> >     world" with "but I *do* use dd in real world".
> 
> Read what I said..
> 
> "... IN GENERAL ..."
> 
> --
> Daniel O'Connor software and network engineer
> for Genesis Software - http://www.gsoft.com.au
> "The nice thing about standards is that there
> are so many of them to choose from."
>   -- Andrew Tanenbaum
> GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
> 
> 
>