Date: Tue, 28 Jun 2005 14:47:07 +0200 From: Michael Schuh <michael.schuh@gmail.com> To: Daniel O'Connor <doconnor@gsoft.com.au> Cc: freebsd-stable@freebsd.org, Roman Neuhauser <neuhauser@sigpipe.cz> Subject: Re: FreeBSD MySQL still WAY slower than Linux Message-ID: <1dbad31505062805472d4c6e0a@mail.gmail.com> In-Reply-To: <200506282105.20586.doconnor@gsoft.com.au> References: <1dbad315050621051525f4c6fc@mail.gmail.com> <200506281904.48464.doconnor@gsoft.com.au> <20050628111332.GC48140@isis.sigpipe.cz> <200506282105.20586.doconnor@gsoft.com.au>
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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=3D/dev/zero bs=3D1024 count=3D1024k of=3Dzerofi= le; 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@gsoft.com.au>: > On Tue, 28 Jun 2005 20:43, Roman Neuhauser wrote: > > # doconnor@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 result= s > > > 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". >=20 > Read what I said.. >=20 > "... IN GENERAL ..." >=20 > -- > 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 >=20 >=20 >
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