| From: | Boszormenyi Zoltan <zb(at)cybertec(dot)at> |
|---|---|
| To: | Fujii Masao <masao(dot)fujii(at)gmail(dot)com> |
| Cc: | Simon Riggs <simon(at)2ndquadrant(dot)com>, Dimitri Fontaine <dfontaine(at)hi-media(dot)com>, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov>, Robert Haas <robertmhaas(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Synchronization levels in SR |
| Date: | 2010-09-08 10:52:09 |
| Message-ID: | 4C876AD9.1080000@cybertec.at |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Fujii Masao írta:
> On Wed, Sep 8, 2010 at 7:04 PM, Boszormenyi Zoltan <zb(at)cybertec(dot)at> wrote:
>
>> Then there is no use to implement individual sync/async
>> replicated transactions, period. An async replicated transaction
>> that waits for a sync replicated transaction because of locks
>> will become implicitely sync. It just waits for another transactions'
>> sync ack.
>>
>
> Hmm.. it's the same with async transaction (i.e., synchronous_commit = false)
> and sync one (synchronous_commit = true). Async transaction cannot take the
> lock held by sync one until the sync has flushed the WAL.
>
You are right.
--
----------------------------------
Zoltán Böszörményi
Cybertec Schönig & Schönig GmbH
Gröhrmühlgasse 26
A-2700 Wiener Neustadt, Austria
Web: http://www.postgresql-support.de
http://www.postgresql.at/
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Robert Haas | 2010-09-08 11:43:15 | Re: Synchronization levels in SR |
| Previous Message | Marko Kreen | 2010-09-08 10:45:37 | Re: UTF16 surrogate pairs in UTF8 encoding |