On 9/16/13 10:14 AM, David Johnston wrote:
The "single" core aspect is interesting. Does the implementation have a
dedicated core to perform these calculations or must the same thread that
handles the relevant query perform this work as well? How much additional
impact/overhead does having to m
Ants Aasma-2 wrote
>> So, has anyone compiled checksum vectorized on OS X? Are there any
>> performance data that would indicate whether or not I should worry with
>> this in the first place?
>
> Even without vectorization the worst case performance hit is about
> 20%. This is for a workload that
On Sun, Sep 15, 2013 at 8:13 AM, Kevin wrote:
> My attempts to compile it vectorized on OS X seemed to have failed since I
> don't find a vector instruction in the .o file even though the options
> -msse4.1 -funroll-loops -ftree-vectorize should be supported according to the
> man page for Appl
I am getting a new server ready for production and saw the release note on the
new checksum feature. I thought it sounded like something we might want, and
then after reading realized we have to initdb with the feature on. I figured
I'd better check into it a little more since changing later mig
