| From: | Andres Freund <andres(at)2ndquadrant(dot)com> |
|---|---|
| To: | Fabrízio de Royes Mello <fabriziomello(at)gmail(dot)com> |
| Cc: | Christoph Berg <cb(at)df7cb(dot)de>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org>, Stephen Frost <sfrost(at)snowman(dot)net> |
| Subject: | Re: [GSoC2014] Patch ALTER TABLE ... SET LOGGED |
| Date: | 2014-07-21 12:51:50 |
| Message-ID: | 20140721125150.GM5974@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
On 2014-07-16 20:45:15 -0300, Fabrízio de Royes Mello wrote:
> > The rewrite will read in the 'old' contents - but because it's done
> > after the pg_class.relpersistence is changed they'll all not be marked
> > as BM_PERMANENT in memory. Then the ALTER TABLE is rolled back,
> > including the relpersistence setting. Which will unfortunately leave
> > pages with the wrong persistency setting in memory, right?
> >
>
> That means should I "FlushRelationBuffers(rel)" before change the
> relpersistence?
Did my explanation clarify the problem + possible solution sufficiently?
Greetings,
Andres Freund
--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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