Re: Does aurora PostgreSQL use wal_buffers?

If memory serves, WAL is used for data streams if enabled. Replication is
done at storage layer within region. Specific question can be sent to SA
or Product team through your account representative.

From:
https://aws.amazon.com/blogs/database/amazon-aurora-postgresql-parameters-part-1-memory-and-query-plan-management/

"
wal_buffers

WAL buffers are used to hold write ahead log (WAL) records that aren’t yet
written to storage. The size of the WAL buffer cache is controlled by the
wal_buffers setting. Aurora uses a log-based storage engine and changes are
sent to storage nodes for persistence. Given the difference in how writes
are handled by the Aurora storage engine, this parameter should be left
unchanged when using Aurora PostgreSQL.
"

Additional information con changes and architecture can be found in this
talk: https://m.youtube.com/watch?v=Ul-j5fKfv2k

Generally, the slides for re:Invent talks make it on to
https://www.slideshare.net/ as well.

Best regards,

Dan Smith

On Sun, Feb 6, 2022, 09:44 Goti <aryan(dot)goti(at)gmail(dot)com> wrote:

> Sure Julien. I will ask Amazon too. My intention was just to gather this
> info IN CASE if someone has already an idea on this. Does that mean that I
> should not be posting Aurora postgres related questions/ doubts here?
> Please correct me if I am wrong!
> Thanks,
>
> Goti
>
>
> On Sun, Feb 6, 2022 at 6:55 PM Julien Rouhaud <rjuju123(at)gmail(dot)com> wrote:
>
>> Hi,
>>
>> On Sun, Feb 06, 2022 at 05:24:37PM +0530, Goti wrote:
>> >
>> > Can someone shed some light as to whether aurora postgres uses wal
>> buffers
>> > or not? Given the way the writes are handled differently, I would like
>> to
>> > understand the same while it is being said in the documentation not to
>> > change the parameter from the default value of 16MB.
>>
>> It's unlikely that any one here can answer the question. You should ask
>> Amazon,
>> not us.
>>
>