From: Tom Lane <tgl@sss.pgh.pa.us>
To: Sajith Prabhakar Shetty <ssajith@blackduck.com>
Cc: pgsql-bugs@lists.postgresql.org <pgsql-bugs@lists.postgresql.org>
Subject: Re: Postgres: Queries are too slow after upgrading to PG17 from PG15
Date: Thu, 15 May 2025 11:46:31 -0400
Message-ID: <11970.1747323991@sss.pgh.pa.us> (raw)
In-Reply-To: <PH7PR19MB6481278D3A55C8BD04B9B9EDB590A@PH7PR19MB6481.namprd19.prod.outlook.com>
References: <PH7PR19MB6481278D3A55C8BD04B9B9EDB590A@PH7PR19MB6481.namprd19.prod.outlook.com>
Sajith Prabhakar Shetty <ssajith@blackduck.com> writes:
> Now surprisingly one of the query i took from application which used to execute in 2s in PG15, is now taking 1min+ in PG17.
The data you've actually showed us does not back up that complaint.
But I do see a 2x slowdown.
> Explain plan of the two queries almost same, all the joins and paths used are exactly same.
Yeah, that is odd. The only simple explanation I can think of is that you
are using a debug build of v17.
regards, tom lane
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To: pgsql-bugs@postgresql.org
Cc: tgl@sss.pgh.pa.us, ssajith@blackduck.com, pgsql-bugs@lists.postgresql.org
Subject: Re: Postgres: Queries are too slow after upgrading to PG17 from PG15
In-Reply-To: <11970.1747323991@sss.pgh.pa.us>
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