Date: Sat, 22 May 2004 10:21:43 -0400 (EDT) From: Daniel Eischen <eischen@vigrid.com> To: JG <amd64list@jpgsworld.com> Cc: freebsd-threads@freebsd.org Subject: Re: Why is MySQL nearly twice as fast on Linux? Message-ID: <Pine.GSO.4.10.10405221020180.23672-100000@pcnet5.pcnet.com> In-Reply-To: <5.2.0.9.2.20040521215952.0166c368@mail.ojoink.com>
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On Fri, 21 May 2004, JG wrote: > >You can also build mysql with LinuxThreads under FreeBSD > >and see if it performs any better. > > LinuxThreads is not available for FreeBSD/AMD64. > > However, as reported on the freebsd-amd64 thread list archive, > sadly, the best configuration turned out to be running this 64-bit AMD64 > hardware in 32-bit mode under _i386_ FreeBSD rather than FreeBSD/AMD64 > with mysql compiled with linuxthreads -- and those results were still very poor > compared to a "out of the box" Linux + mysql install. > > > If it is comparable, > >that would tend to point to the kernel as the limiting > >factor. > > There is a significant improvement when using LinuxThreads vs > libpthreads or libc_r, others have reported no difference with libthr > as well. Can you point to the results (same hardware, native linux vs libpthread vs linuxthreads)? There is too much volume on amd64 to go searching. -- Dan Eischen
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