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Re: V4 of PITR performance improvement for 8.4

From: Fujii Masao <masao(dot)fujii(at)gmail(dot)com>
To: Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>
Cc: Koichi Suzuki <koichi(dot)szk(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Gregory Stark <stark(at)enterprisedb(dot)com>, ITAGAKI Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: V4 of PITR performance improvement for 8.4
Date: 2009-03-10 04:47:02
Message-ID: 3f0b79eb0903092147q5f340c66g80e1898696399a4b@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers 
Hi,

On Mon, Mar 9, 2009 at 10:20 PM, Heikki Linnakangas
<heikki(dot)linnakangas(at)enterprisedb(dot)com> wrote:
> Thanks. This patch seems to be missing the new readahead.c file. I grabbed
> that from the previous patch version.

Oh, sorry for the mistake. I changed one of Suzuki-san's patches
to be rebased to HEAD again (readahead-20090310.patch).
The other (addShBufCheck-20090120.patch) is not changed.

Comment:
we might reach consistent recovery state *before* redoing the safe
starting point, because readahead slightly delays the actual redo.
Is this safe? If not, the readahead queue should be flushed before
reaching that state?

Regards,

-- 
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center
Attachment: addShBufCheck-20090120.patch
Description: application/octet-stream (6.1 KB)
Attachment: readahead-20090310.patch
Description: application/octet-stream (39.3 KB)

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