Re: Proposal for 9.1: WAL streaming from WAL buffers
Fujii Masao <masao.fujii@gmail.com>
From: Fujii Masao <masao.fujii@gmail.com>
To: Stefan Kaltenbrunner <stefan@kaltenbrunner.cc>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2010-06-14T08:42:12Z
Lists: pgsql-hackers
On Sat, Jun 12, 2010 at 12:15 AM, Stefan Kaltenbrunner <stefan@kaltenbrunner.cc> wrote: > hmm ok - but assuming sync rep we would end up with something like the > following(hypotetically assuming each operation takes 1 time unit): > > originally: > > write 1 > sync 1 > network 1 > write 1 > sync 1 > > total: 5 > > whereas in the new case we would basically have the write+sync compete with > network+write+sync in parallel(total 3 units) and we would only have to wait > for the slower of those two sets of operations instead of the total time of > both or am I missing something. Yeah, this is what I'd like to say. Thanks! Regards, -- Fujii Masao NIPPON TELEGRAPH AND TELEPHONE CORPORATION NTT Open Source Software Center