I gave -O3 a try with -funroll-loops, -fomit-frame-pointer and a few
others. Seemed to perform about the same as the default -O2 so I just
left it as -O2.
Gustavo Franklin Nóbrega wrote:
> Hi Willian,
>
> Which are the GCC flags that you it used to compile PostgreSQL?
>
> Best regards,
>
> Gustavo Franklin Nóbrega
> Infraestrutura e Banco de Dados
> Planae Tecnologia da Informação
> (+55) 14 3224-3066 Ramal 209
> www.planae.com.br
>
>
>>I just finished upgrading the OS on our Opteron 148 from Redhat9 to
>>Fedora FC2 X86_64 with full recompiles of Postgres/Apache/Perl/Samba/etc.
>>
>>The verdict: a definite performance improvement. I tested just a few CPU
>>intensive queries and many of them are a good 30%-50% faster.
>>Transactional/batch jobs involving client machines (i.e. include fixed
>>client/networking/odbc overhead) seem to be about 10%-20% faster
>>although I will need run more data through the system to get a better
>>feel of the numbers.
>>
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>
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