From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
---|---|
To: | Tom Lane <tgl(at)postgresql(dot)org> |
Cc: | pgsql-committers(at)postgresql(dot)org |
Subject: | Re: pgsql: Assorted cleanups in preparation for using a map file to support |
Date: | 2010-02-03 10:05:29 |
Message-ID: | 1265191529.1729.2239.camel@ebony |
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Lists: | pgsql-committers pgsql-hackers |
On Wed, 2010-02-03 at 01:14 +0000, Tom Lane wrote:
> 1. Get rid of inval.c's dependency on relfilenode, by not having it emit
> smgr invalidations as a result of relcache flushes. Instead, smgr sinval
> messages are sent directly from smgr.c when an actual relation delete or
> truncate is done. This makes considerably more structural sense and allows
> elimination of a large number of useless smgr inval messages that were
> formerly sent even in cases where nothing was changing at the
> physical-relation level. Note that this reintroduces the concept of
> nontransactional inval messages, but that's okay --- because the messages
> are sent by smgr.c, they will be sent in Hot Standby slaves, just from a
> lower logical level than before.
Presumably this means that SHAREDINVALSMGR_ID messages are no longer
part of the invalidation messages attached to a commit record?
If so, there is some minor code cleanup and comment changes in
ProcessCommittedInvalidationMessages(). Would you like me to do that, or
should we wait?
--
Simon Riggs www.2ndQuadrant.com
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