Re: SLRUs in the main buffer pool - Page Header definitions - Mailing list pgsql-hackers

From Andres Freund
Subject Re: SLRUs in the main buffer pool - Page Header definitions
Date
Msg-id 20220623212145.vcooepyq4ynrslxo@alap3.anarazel.de
Whole thread Raw
In response to Re: SLRUs in the main buffer pool - Page Header definitions  ("Bagga, Rishu" <bagrishu@amazon.com>)
Responses Re: SLRUs in the main buffer pool - Page Header definitions
List pgsql-hackers
Hi,

On 2022-06-23 20:25:21 +0000, Bagga, Rishu wrote:
> >> 3. A flag to identify if the page is a relational or BufferedObject
> >Why is this needed in the page header?
> 
> Now that we are dealing with two different type of page headers, we need to
> know how to interpret any given page. We need to use pd_flags to determine
> this.

When do we need to do so? We should never need to figure out whether an
on-disk block is for an SLRU or something else, without also knowing which
relation / SLRU it is in.

Greetings,

Andres Freund



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