| From: | Peter Eisentraut <peter(dot)eisentraut(at)enterprisedb(dot)com> |
|---|---|
| To: | Stephen Frost <sfrost(at)snowman(dot)net>, Michael Paquier <michael(at)paquier(dot)xyz> |
| Cc: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, "Bossart, Nathan" <bossartn(at)amazon(dot)com>, Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at>, Bernd Helmle <mailings(at)oopsware(dot)de>, "tsunakawa(dot)takay(at)fujitsu(dot)com" <tsunakawa(dot)takay(at)fujitsu(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Change default of checkpoint_completion_target |
| Date: | 2020-12-07 19:08:25 |
| Message-ID: | 5285eb02-3340-7728-9f62-1a4365eda850@enterprisedb.com |
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| Lists: | pgsql-hackers |
On 2020-12-07 18:53, Stephen Frost wrote:
> * Michael Paquier (michael(at)paquier(dot)xyz) wrote:
>> On Sun, Dec 06, 2020 at 10:03:08AM -0500, Stephen Frost wrote:
>>> * Alvaro Herrera (alvherre(at)alvh(dot)no-ip(dot)org) wrote:
>>>> You keep making this statement, and I don't necessarily disagree, but if
>>>> that is the case, please explain why don't we have
>>>> checkpoint_completion_target set to 0.9 by default? Should we change
>>>> that?
>>>
>>> Yes, I do think we should change that..
>>
>> Agreed. FWIW, no idea for others, but it is one of those parameters I
>> keep telling to update after a default installation.
>
> Concretely, attached is a patch which changes the default and updates
> the documentation accordingly.
I agree with considering this change, but I wonder why the value 0.9.
Why not, say, 0.95, 0.99, or 1.0?
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