Message-ID: <7428912d-1600-4e79-9aed-fee788e20ca0@gmail.com>
Date: Thu, 17 Oct 2024 16:48:40 +0700
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Subject: Re: Reference to - BUG #18349: ERROR: invalid DSA memory alloc
 request size 1811939328, CONTEXT: parallel worker
To: Thomas Munro <thomas.munro@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Craig Milhiser <craig@milhiser.com>,
 pgsql-bugs@lists.postgresql.org
References: 
 <CA+wnhO1OfgXbmXgC4fv_uu=OxcDQuHvfoQ4k0DFeB0Qqd-X-rQ@mail.gmail.com>
 <CA+wnhO0S2kxJ2_M57uJXRocMpcDtz6N4RkP-3Xy=pFs1wp7hmg@mail.gmail.com>
 <CA+hUKGLPKWamfKjtEkPLvRDSeOqoZZ0wDfU65d-hF-1upL8iGw@mail.gmail.com>
 <CA+wnhO3kT7mxbadbteppSZVcs3FRPvGL5xTY2DbrWSGohmhyVw@mail.gmail.com>
 <6785e9e8-4c64-41b0-9e72-c13d1822b599@gmail.com>
 <CA+wnhO0VdTP9OVdZP9bmkavma2WkE-pYpP1yW8yDwRrJ97j-2g@mail.gmail.com>
 <0c3b0e1b-55d1-42b6-8c3c-4392479187db@gmail.com>
 <CA+wnhO2sHcUOfi6_gvaoPMk=2DsKUOWkDjdUtGxJOguQOXDvOQ@mail.gmail.com>
 <cc488d1c-6477-4e20-8bd0-cf152a2e59bf@gmail.com>
 <CA+wnhO3t7xqCiDmGduxgg1Mv5M5R-GeQd0kzVcJKkUFkj91Wbw@mail.gmail.com>
 <CA+hUKGLYx2GGd8BggND5QnyyJKbf1r+Q0cEYWrN+miXzaxwGNA@mail.gmail.com>
 <3581840.1728887169@sss.pgh.pa.us>
 <3a1ac6f1-ac30-4ed4-8d0d-beb8a5aca7e5@gmail.com>
 <CA+hUKGKOoxiGBqv=RA-e8=LXNhdmRCC_rOYbpaqbL16=4wvJ3A@mail.gmail.com>
 <30fbb76b-4b6f-405e-bf9c-741fe2c7722a@gmail.com>
 <CA+hUKGKKQh7RkUrYfEq+O1AtTgSsRrhR3_t_+dOpz1o9ebuxrA@mail.gmail.com>
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From: Andrei Lepikhov <lepihov@gmail.com>
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On 10/17/24 15:57, Thomas Munro wrote:
> On Thu, Oct 17, 2024 at 9:12 PM Andrei Lepikhov <lepihov@gmail.com> wrote:
>> Yeah, I misunderstood the meaning of the estimated_size variable. Your
>> solution is more universal. Also, I confirm, it passes my synthetic  test.
>> Also, it raises the immediate question: What if we have too many
>> duplicates? Sometimes, in user complaints, I see examples where they,
>> analysing the database's logical consistency, pass through millions of
>> duplicates to find an unexpected value. Do we need a top memory
>> consumption limit here? I recall a thread in the mailing list with a
>> general approach to limiting backend memory consumption, but it is
>> finished with no result.
> 
> It is a hard problem alright[1].
> 
>> The patch looks good as well as commentary.
> 
> Thanks, I will go ahead and push this now.
> 
> [1] https://www.postgresql.org/message-id/flat/CAAKRu_aLMRHX6_y%3DK5i5wBMTMQvoPMO8DT3eyCziTHjsY11cVA%40mail.gmail.com
Thanks for the link.
BTW, why not to use current case and fix the problem with the 'invalid 
DSA memory alloc request size 1811939328' itself ?

-- 
regards, Andrei Lepikhov