Re: prevent immature WAL streaming

On 9/17/21, 10:35 AM, "Alvaro Herrera" <alvherre@alvh.no-ip.org> wrote:
> On 2021-Sep-17, Bossart, Nathan wrote:
>
>> On 9/17/21, 9:37 AM, "Alvaro Herrera" <alvherre@alvh.no-ip.org> wrote:
>
>> > If you have some time to try your reproducers with this new proposed
>> > fix, I would appreciate it.
>>
>> I haven't had a chance to look at the patch yet, but it appears to fix
>> things with my original reproduction steps for the archive_status
>> stuff [0].
>
> Thank you, this is good to hear.

I gave the patch a read-through.  I'm wondering if the
XLOG_OVERWRITE_CONTRECORD records are actually necessary.  IIUC we
will set XLP_FIRST_IS_ABORTED_PARTIAL on the next page, and
xlp_pageaddr on that page will already be validated in
XLogReaderValidatePageHeader().  Does adding this new record also help
ensure the page header is filled in and flushed to disk?

Nathan