Re: GUC with units, details

Michael Glaesemann <grzm@seespotcode.net> writes:
> I've seen this mentioned a couple of times. I'm not nearly as  
> familiar with these settings as I should be, but it seems to me that  
> if the memory size *does* need to be a integral multiple of page  
> size, e.g., n * page_size = memory_size,  why isn't that memory  
> configured as the integer n rather than memory_size?

It is.  For instance shared_buffers is configured as the number of
buffers.  What we're talking about here is ways to specify the intended
usage with other units (eg "I want N megabytes of shared buffers") but
that's not going to magically let you allocate half a shared buffer.
Peter's not said exactly how he plans to deal with this, but I suppose
it'll round off one way or the other ...
        regards, tom lane