Re: Linux v.s. Mac OS-X Performance

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On 11/27/07 18:01, Scott Ribe wrote:
>> In general, you can expect any Unix based OS, which includes MacOS X, to
>> perform noticeably better than Windows for PostgreSQL.
>
> Is that really true of BSD UNIXen??? I've certainly heard it's true of
> Linux. But with BSD you have the "kernel funnel" which can severely limit
> multitasking, regardless of whether threads or processes were used. Apple
> has been working toward finer-grained locking precisely because that was a
> serious bottleneck which limited OS X server performance.
>
> Or have I misunderstood and this was only the design of one particular
> flavor of BSD, not BSDen in general?

IIRC, FreeBSD got rid of the Giant Lock back in v5.x.

There was a benchmark in Feb 2007 which demonstrated that FBSD 7.0
scaled *better* than Linux 2.6 after 4 CPUs.
http://jeffr-tech.livejournal.com/5705.html

Turns out that there was/is a bug in glibc's malloc(). Don't know
if it's been fixed yet.

- --
Ron Johnson, Jr.
Jefferson LA USA

%SYSTEM-F-FISH, my hovercraft is full of eels
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