Re: Streaming Replication: Checkpoint_segment and wal_keep_segments on standby

Fujii Masao <masao.fujii@gmail.com>

From: Fujii Masao <masao.fujii@gmail.com>

To: Heikki Linnakangas <heikki.linnakangas@enterprisedb.com>

Cc: Robert Haas <robertmhaas@gmail.com>, "Sander, Ingo (NSN - DE/Munich)" <ingo.sander@nsn.com>, pgsql-hackers@postgresql.org

Date: 2010-06-02T13:24:30Z

Lists: pgsql-hackers

Attachments

checkpoint_segments_during_recovery_v3.patch (application/octet-stream) patch v3

On Wed, Jun 2, 2010 at 8:40 PM, Heikki Linnakangas
<heikki.linnakangas@enterprisedb.com> wrote:
> On 02/06/10 06:23, Fujii Masao wrote:
>>
>> On Mon, May 31, 2010 at 7:17 PM, Fujii Masao<masao.fujii@gmail.com>
>>  wrote:
>>>
>>> 4) Change it so that checkpoint_segments takes effect in standby mode,
>>> but not during recovery otherwise
>>
>> I revised the patch to achieve 4). This will enable checkpoint_segments
>> to trigger a restartpoint like checkpoint_timeout already does, in
>> standby mode (i.e., streaming replication or file-based log shipping).
>
> Hmm, XLogCtl->Insert.RedoRecPtr is not updated during recovery, so this
> doesn't work.

Oops! I revised the patch, which changes CreateRestartPoint() so that
it updates XLogCtl->Insert.RedoRecPtr.

Regards,

-- 
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center