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From: Jonathan S. Katz <[email protected]>
To: Bruce Momjian <[email protected]>
Cc: David G. Johnston <[email protected]>
Cc: Pg Docs <[email protected]>
Subject: Re: documentation on HOT
Date: Fri, 22 Jul 2022 11:09:49 -0400
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>
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	<YtoFKu1D/[email protected]>
	<[email protected]>

On 7/22/22 8:51 AM, Bruce Momjian wrote:
> On Thu, Jul 21, 2022 at 10:02:18PM -0400, Bruce Momjian wrote:
>> On Sun, Feb  6, 2022 at 09:29:56PM -0500, Jonathan Katz wrote:
>>> I agree with Bruce's point that we should have a new section (or
>>> subsection). As I mentioned in my previous post, given HOT involves
>>> indexing, I would suggest putting it there.
>>>
>>> I think that something that follows the general outline of Laurenz's post
>>> would satisfy the user requirements. It explains at a high level what HOT
>>> is, it's advantages, and how it works.
>>
>> Attached is a patch that adds a new HOT section to the storage chapter.
> 
> I wasn't happy with the last paragraph so I added some more details.
> URL contents updated too:
> 
> 	https://momjian.us/tmp/pgsql/storage-hot.html

Thanks! This is great. Probably the most concise and clear explanation I 
have seen for HOT, which is exactly what we need for the docs :)

A few suggestions:

s/Fortunately, there is/To help reduce overhead, PostgreSQL has/

s/In summary, h/H/

 > You can increase the change of HOT updates by using non-default table 
fillfactor settings.

I think we should expand on this and explain how adjusting "fillfactor" 
will affect this. I think that may change the final sentence too.

Thanks,

Jonathan


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