Re: [HACKERS] 8K block limit

On Wed, 17 Feb 1999, Tatsuo Ishii wrote:

> > On Mon, 15 Feb 1999, Ken Mort wrote:
> >
> > > Already asked this in the other lists so here.
> > >
> > > I need to store some polygons that are larger than 8K.
> > > I was reading in hackers archives talk about a solution
> > > to the 8K limit. Was anything done? If so, what do I
> > > need to do to solve my problem?
> >
> > There is an option that can be set at compile time to set the block size
> > from 8k to something like 32 or 64K (not sure which).
>
> I think it is 32k. (tuple offset in a block is limited to 15 bits)
>
> > Note: Changing the block size may have a performance hit however.
>
> Why?

I think some file systems are more optimised for 8K blocks. I may be
thinking on the original reason for the 8k limit in the first place, but I
remember there was discussions about this when the block size was altered.

Peter

--
Peter Mount, IT Section
petermount(at)it(dot)maidstone(dot)gov(dot)uk
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