Re: pgsql-server/src backend/access/transam/xact.c ...

>     Commit the reasonably uncontroversial parts of J.R. Nield's PITR patch, to
>     wit: Add a header record to each WAL segment file so that it can be reliably
>     identified.  Avoid splitting WAL records across segment files (this is not
>     strictly necessary, but makes it simpler to incorporate the header records).
>     Make WAL entries for file creation, deletion, and truncation (as foreseen but
>     never implemented by Vadim).  Also, add support for making XLOG_SEG_SIZE
>     configurable at compile time, similarly to BLCKSZ.  Fix a couple bugs I
>     introduced in WAL replay during recent smgr API changes.  initdb is forced
>     due to changes in pg_control contents.

Is it worth adding one of those readonly GUC vars for XLOG_SEG_SIZE then?

Chris