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Re: [BUG] Checkpointer on hot standby runs without looking checkpoint_segments - Mailing list pgsql-hackers

From Heikki Linnakangas
Subject Re: [BUG] Checkpointer on hot standby runs without looking checkpoint_segments
Date
Msg-id 4F964DD0.4000903@enterprisedb.com
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In response to Re: [BUG] Checkpointer on hot standby runs without looking checkpoint_segments  (Fujii Masao <masao.fujii@gmail.com>)
Responses Re: [BUG] Checkpointer on hot standby runs without looking checkpoint_segments  (Fujii Masao <masao.fujii@gmail.com>)
Re: [BUG] Checkpointer on hot standby runs without looking checkpoint_segments  (Kyotaro HORIGUCHI <horiguchi.kyotaro@lab.ntt.co.jp>)
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On 23.04.2012 02:59, Fujii Masao wrote:
> On Thu, Apr 19, 2012 at 2:20 PM, Kyotaro HORIGUCHI
> <horiguchi.kyotaro@lab.ntt.co.jp>  wrote:
>> Hello, this is new version of standby checkpoint_segments patch.
>
> Thanks for the patch!

This still makes catching up in standby mode slower, as you get many 
more restartpoints. The reason for ignoring checkpoint_segments during 
recovery was to avoid that. Maybe it's still better than what we have 
currently, I'm not sure, but at least it needs to be discussed. Would be 
good to do some performance testing of recovery with various 
checkpoint_segments and _timeout settings, with and without this patch.

--   Heikki Linnakangas  EnterpriseDB   http://www.enterprisedb.com

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