Re: [HACKERS] increasing the default WAL segment size

On 5 April 2017 at 06:04, Beena Emerson <memissemerson@gmail.com> wrote:

I see various issues raised but not properly addressed

1. we would need to drop support for segment sizes < 16MB unless we
adopt a new incompatible filename format.
I think at 16MB the naming should be the same as now and that
WALfilename -> LSN is very important.
For this release, I think we should just allow >= 16MB and avoid the
issue thru lack of time.

2. It's not clear to me the advantage of being able to pick varying
filesizes. I see great disadvantage in having too many options, which
greatly increases the chance of incompatibility, annoyance and
breakage. I favour a small number of values that have been shown by
testing to be sweet spots in performance and usability. (1GB has been
suggested)

3. New file allocation has been a problem raised with this patch for
some months now.