| From: | "alvherre(at)alvh(dot)no-ip(dot)org" <alvherre(at)alvh(dot)no-ip(dot)org> |
|---|---|
| To: | "Bossart, Nathan" <bossartn(at)amazon(dot)com> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, "x4mmm(at)yandex-team(dot)ru" <x4mmm(at)yandex-team(dot)ru>, "a(dot)lubennikova(at)postgrespro(dot)ru" <a(dot)lubennikova(at)postgrespro(dot)ru>, "hlinnaka(at)iki(dot)fi" <hlinnaka(at)iki(dot)fi>, "matsumura(dot)ryo(at)fujitsu(dot)com" <matsumura(dot)ryo(at)fujitsu(dot)com>, "masao(dot)fujii(at)gmail(dot)com" <masao(dot)fujii(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: archive status ".ready" files may be created too early |
| Date: | 2021-08-23 17:30:12 |
| Message-ID: | 202108231730.qrifplqfm27i@alvherre.pgsql |
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| Lists: | pgsql-hackers |
On 2021-Aug-23, alvherre(at)alvh(dot)no-ip(dot)org wrote:
> The only way .ready files are created is that XLogNotifyWrite() is
> called. For regular WAL files during regular operation, that only
> happens in XLogNotifyWriteSeg(). That, in turn, only happens in
> NotifySegmentsReadyForArchive(). But if the system runs and never
> writes WAL records that cross WAL boundaries, that function will see
> that both earliestSegBoundary and latestSegBoundary are MaxXLogSegno,
> and return without doing anything. So no segments will be notified.
Nevermind -- I realized that all segments get registered, not just those
for which we generate continuation records.
--
Álvaro Herrera 39°49'30"S 73°17'W — https://www.EnterpriseDB.com/
"Use it up, wear it out, make it do, or do without"
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