| From: | Simon Riggs <simon(at)2ndQuadrant(dot)com> |
|---|---|
| To: | Tatsuo Ishii <ishii(at)postgresql(dot)org> |
| Cc: | pgsql-hackers(at)postgresql(dot)org, heikki(dot)linnakangas(at)enterprisedb(dot)com |
| Subject: | Re: Summary and Plan for Hot Standby |
| Date: | 2009-11-16 17:13:13 |
| Message-ID: | 1258391593.14054.4826.camel@ebony |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
On Mon, 2009-11-16 at 19:06 +0900, Tatsuo Ishii wrote:
> > > - Does Hot Standby allow to use prepared query (not prepared
> > > transaction) in standby? I mean: Parse message from frontend can be
> > > accepted by standby?
> >
> > Yes, no problem with any of those kind of facilities
>
> Please correct me if I'm wrong. Parse will result in obtaining
> RowExclusiveLock on the target table if it is parsing
> INSERT/UPDATE/DELETE. If so, is this ok in the standby?
Any attempt to take RowExclusiveLock will fail.
Any attempt to execute INSERT/UPDATE/DELETE will fail.
This behaviour should be identical to read only transaction mode. If it
is not documented as an exception, please report as a bug.
--
Simon Riggs www.2ndQuadrant.com
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