Re: POC: Cleaning up orphaned files using undo logs

From: Andres Freund <andres(at)anarazel(dot)de>
To: Dilip Kumar <dilipbalaut(at)gmail(dot)com>
Cc: Robert Haas <robertmhaas(at)gmail(dot)com>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, Kuntal Ghosh <kuntalghosh(dot)2007(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: POC: Cleaning up orphaned files using undo logs
Date: 2019-08-22 04:28:23
Message-ID: 20190822042823.qrrr7pzelbsjwtt6@alap3.anarazel.de
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Hi,

On 2019-08-22 09:51:22 +0530, Dilip Kumar wrote:
> We can not know the complete size of the record even by reading the
> header because we have a payload that is variable part and payload
> length are stored in the payload header which again can be at random
> offset.

Wait, but that's just purely self inflicted damage, no? The initial
length just needs to include the payload. And all this is not an issue
anymore?

Greetings,

Andres Freund

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