Thank you Andy for your answer.
That is exactly what I had expected, but it is better to consult with experts on this matter.
Again, thank you.
On Aug 3, 2011 7:05 PM, "Andy Colson" <
andy@squeakycode.net> wrote:
> On 8/3/2011 11:37 AM, Dusan Misic wrote:
>> I had done some testing for my application (WIP) and I had executed same
>> SQL script and queries on real physical 64-bit Windows 7 and on
>> virtualized 64-bit CentOS 6.
>>
>> Both database servers are tuned with real having 8 GB RAM and 4 cores,
>> virtualized having 2 GB RAM and 2 virtual cores.
>>
>> Virtualized server crushed real physical server in performance in both
>> DDL and DML scripts.
>>
>> My question is simple. Does PostgreSQL perform better on Linux than on
>> Windows and how much is it faster in your tests?
>>
>> Thank you for your time.
>>
>
> Given the exact same hardware, I think PG will perform better on Linux.
>
> Your question "how much faster" is really dependent on usage. If you're
> cpu bound then I'd bet they perform the same. You are cpu bound after
> all, and on the exact same hardware, it should be the same.
>
> If you have lots of clients, with lots of IO, I think linux would
> perform better, but hard to say how much. I cant recall anyone posting
> benchmarks from "the exact same hardware".
>
> Comparing windows on metal vs linux on vm is like comparing apples to
> Missouri. If your test was io bound, and the vmserver was write
> caching, that's why your vm won so well... but I'd hate to see a power
> failure.
>
> It would be interesting to compare windows on metal vs windows on vm
> though. (Which, I have done linux on metal vs linux on vm, but the
> hardware specs where different (dual amd64 4 sata software raid10 vs
> intel 8-core something with 6-disk scsi hardware raid), but linux on
> metal won every time.)
>
> I think in the long run, running the system you are best at, will be a
> win. If you don't know linux much, and run into problems, how much
> time/money will you spend fixing it. Compared to windows.
>
> If you have to have the fastest, absolute, system. Linux on metal is
> the way to go.
>
> (This is all speculation and personal opinion, I have no numbers to back
> anything up)
>
> -Andy