Re: switch UNLOGGED to LOGGED

Excerpts from Leonardo Francalanci's message of lun abr 18 09:36:13 -0300 2011:
> I think I coded a very basic version of the UNLOGGED to LOGGED patch
> (only wal_level=minimal case for the moment).
>
> To remove the INIT fork, I changed somehow PendingRelDelete to have
> a flag "bool onlyInitFork" so that the delete would remove only the INIT
> fork at commit.
>
> Everything "works" (note the quotes...) except in the case of not-clean
> shutdown ("-m immediate" to pg_ctl stop). The reason is that the replay
> code doesn't have any idea that it has to remove only the INIT fork: it will
> remove ALL forks; so at the end of the redo procedure (at startup, after
> a "pg_ctl -m immediate stop") the table doesn't have any forks at all.

Maybe you should change xl_act_commit to have a separate list of rels to
drop the init fork for (instead of mixing those with the list of files to
drop as a whole).

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Álvaro Herrera <alvherre(at)commandprompt(dot)com>
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