Re: [COMMITTERS] pgsql: Sigh ...

Tom Lane wrote:
> Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
>
>> ! print O "#define RELSEG_SIZE ",
>> ! (1024 / $self->{options}->{blocksize}) *
>> ! $self->{options}->{segsize} * 1024, "\n";
>>
>
> This doesn't look quite right; unless the arithmetic is being done in
> floating point? I had it like this in configure.in:
>
> RELSEG_SIZE=`expr '(' 1024 '*' ${segsize} / ${blocksize} ')' '*' 1024`
>

blocksize is one of (1,2,4,8,16,32) so it should always be a factor of
1024 unless my arithmetic is awry. I did it that way because I dislike
expressions with unbracketed mixed operations - they make me think too
much.

> Also it looks like you missed adding segsize to the config.pl comments.
>
>
>

That's deliberate - we are currently only allowing a value of 1 here, so
I don't see any point in putting it in the sample config file, even as a
comment. When we enable other seg sizes we can add it to the sample file.

cheers

andrew