Re: WAL format

Heikki Linnakangas  writes:
> In particular I wonder why we bother with the page headers. A much
> simpler format would be:

> - get rid of page headers, except for the header at the beginning of
> each WAL segment
> - get rid of continuation records
> - at the end of WAL segment, when there's not enough space to write the
> next WAL record, always write an XLOG SWITCH record to fill the rest of
> the segment.

What do you do with a WAL record that doesn't fit in a segment?  (They
do exist.)  I don't think you can eliminate continuation records.
You could maybe use them only at segment boundaries but I doubt that
makes things any simpler than they are now.
		regards, tom lane