Re: Benchmark (Phoronix): FreeBSD 9.0-RC2 vs. Oracle Linux 6.1 Server

2011-12-20 Thread Chiron IO 
Guys,

I have a question about these benchmarks.

Why worry about that if the CURRENT comes with debug enabled by default?

http://joaobarros.blogspot.com/2005/07/freebsd-how-to-turn-off-debug-options.html




On 19/12/2011, at 22:28, Petro Rossini wrote:

 Hi all,
 
 just a thought here:
 
 On Tue, Dec 20, 2011 at 12:45 AM, Daniel Kalchev dan...@digsys.bg wrote:
 As were told, Phoronix used default setup, not tuned.
 Not really. They created some weird test environment, at least for FreeBSD
 -- who knows, possibly for Linux as well.
 
 For example, ZFS is by no means a default file system in FreeBSD. You need
 to go trough manual steps, to enable it, to build the pool, filesystems etc.
 
 ..
 
 Of course the benchmark setup and procedure is strange but..
 
 it could be improved, I think.
 
 Have a good collection of tuning parameters for popular cases,
 advertised properly so it gets hard to miss them.
 
 I am a sysadmin and, over the years, I had to run file servers,
 database servers, web servers, tomcats...
 
 Well, most of the time I set it up and it just works because the
 system in question is not maxed out, not even close to it.
 
 But if I want to squeeze the last 20% out of it googling starts, and
 here and there I find hints how to tune the OS, the file system, what
 scheduler to use etc.
 
 It would be great to have a set of case studies at hand, e.g. under
 the /usr/share/examples directory, that describes tweaks to have a
 performing postgresql server, or mysql, or apache or a desktop or..
 
 Things I find, for example, in the BSD Magazine.
 
 Maybe benchmarks become more meaningful then..
 
 A general remark for people doing benchmarks for comparison: you need
 a well-informed system engineer for the systems you compare. So, if
 you compare a Linux system with  FreeBSD, have two experienced admins
 that know their OS well.
 
 Regards
 Peter
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Re: Benchmark (Phoronix): FreeBSD 9.0-RC2 vs. Oracle Linux 6.1 Server

2011-12-20 Thread Chiron IO 
http://wiki.freebsd.org/DefaultDebuggingKnobs

I am not aware of any linux distribution that comes with debug enabled by 
default, even on RC releases.

It seems that this approach (debug by default) is welcome to help solve 
problems that might appear,  but I would be happy if these benchmarks were made 
without such config (debug) enabled.

On 20/12/2011, at 17:09, Samuel J. Greear wrote:

 On Tue, Dec 20, 2011 at 4:28 AM, Chiron IO io.chi...@gmail.com wrote:
 Guys,
 
 I have a question about these benchmarks.
 
 Why worry about that if the CURRENT comes with debug enabled by default?
 
 http://joaobarros.blogspot.com/2005/07/freebsd-how-to-turn-off-debug-options.html
 
 
 
 In the real world problems happen and someone has to be able to, in some 
 fashion, identify and resolve those problems. As such, shipping FreeBSD 
 releases with INVARIANTS disabled is a mistake and any benchmarks done 
 without INVARIANTS enabled will fail to reflect most reasonable real world 
 use-cases.
 
 Although these benchmarks cannot stand on their own merits for many reasons, 
 I do not see how any benchmark is automatically invalidated by using the 
 default development configuration.
 
 Sam

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