Date: Fri, 7 Feb 2020 20:02:01 +0100
From: Tomas Vondra <tomas.vondra@2ndquadrant.com>
To: Andres Freund <andres@anarazel.de>
Cc: Kuntal Ghosh <kuntalghosh.2007@gmail.com>, Tom Lane <tgl@sss.pgh.pa.us>,
	Amit Kapila <amit.kapila16@gmail.com>,
	Noah Misch <noah@leadboat.com>,
	Amit Khandekar <amitdkhan.pg@gmail.com>,
	Alvaro Herrera from 2ndQuadrant <alvherre@alvh.no-ip.org>,
	Juan =?utf-8?B?Sm9zw6kgU2FudGFtYXLDrWE=?= Flecha
 <juanjo.santamaria@gmail.com>,
	PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>,
	Robert Haas <robertmhaas@gmail.com>,
	Thomas Munro <thomas.munro@gmail.com>
Subject: Re: logical decoding : exceeded maxAllocatedDescs for .spill files
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On Fri, Feb 07, 2020 at 10:33:48AM -0800, Andres Freund wrote:
>Hi,
>
>On 2020-02-04 10:15:01 +0530, Kuntal Ghosh wrote:
>> And, the issue got reproduced with the same error:
>> WARNING:  problem in Generation Tuples: number of free chunks 0 in
>> block 0x7fe9e9e74010 exceeds 1018 allocated
>
>That seems like a problem in generation.c - because this should be
>unreachable, I think?
>
>Tomas?
>

That's rather strange. How could we print this message? The code looks
like this

   if (block->nfree >= block->nchunks)
     elog(WARNING, "problem in Generation %s: number of free chunks %d in block %p exceeds %d allocated",
          name, block->nfree, block, block->nchunks);

so this says 0 >= 1018. Or am I missing something?


regards

-- 
Tomas Vondra                  http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services