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

On Fri, 30 Nov 2007, Guido Neitzer wrote:

> Actually - In our test if just used with a similar load as pgbench (e.g.
> typical web applications) Mac OS X  10.4.7 performed better then Yellow Dog
> Linux (I was testing with G5 hardware) on the same hardware as soon as more
> than about 90 concurrent clients were simulated.

At this point, that's just an interesting historical note.  Yellow Dog is
not a particularly good Linux compared with the ones that have gotten
years worth of performance tuning for Intel/AMD processors.  And you
really can't extrapolate anything useful today from how it ran on a
G5--that's two layers of obsolete.  The comparisons that matter now are
Intel+Mac OS vs. Intel+a popular Linux aimed at servers.

As an unrelated note, I'm curious what you did with pgbench that you
consider it a reasonable similation of a web application.  The default
pgbench transaction is very write-heavy, and the read-only option
available is way too simple to be realistic.  You'd need to pass in custom
scripts to execute to get something that acted like a web app.  pgbench is
an unruly tool, and there's many ways to run it that gives results that
aren't so useful.

--
* Greg Smith gsmith@gregsmith.com http://www.gregsmith.com Baltimore, MD