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Re: Parallel vacuum workers prevent the oldest xmin from advancing - Mailing list pgsql-hackers

From Alvaro Herrera
Subject Re: Parallel vacuum workers prevent the oldest xmin from advancing
Date
Msg-id 202110191535.cwatf63vvobo@alvherre.pgsql
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In response to Re: Parallel vacuum workers prevent the oldest xmin from advancing  (Masahiko Sawada <sawada.mshk@gmail.com>)
Responses Re: Parallel vacuum workers prevent the oldest xmin from advancing  (Alvaro Herrera <alvherre@alvh.no-ip.org>)
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Hmm, I think this should happen before the transaction snapshot is
established in the worker; perhaps immediately after calling
StartParallelWorkerTransaction(), or anyway not after
SetTransactionSnapshot.  In fact, since SetTransactionSnapshot receives
a 'sourceproc' argument, why not do it exactly there? ISTM that
ProcArrayInstallRestoredXmin() is where this should happen.

-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/

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