Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mJkgp-0002mO-SH for pgsql-general@arkaria.postgresql.org; Fri, 27 Aug 2021 22:51:11 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.92) (envelope-from ) id 1mJkgo-0004yM-Rq for pgsql-general@arkaria.postgresql.org; Fri, 27 Aug 2021 22:51:10 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mJkgo-0004xb-It for pgsql-general@lists.postgresql.org; Fri, 27 Aug 2021 22:51:10 +0000 Received: from sss.pgh.pa.us ([66.207.139.130]) by magus.postgresql.org with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1mJkgm-0005c8-I9 for pgsql-general@lists.postgresql.org; Fri, 27 Aug 2021 22:51:10 +0000 Received: from sss1.sss.pgh.pa.us (localhost [127.0.0.1]) by sss.pgh.pa.us (8.15.2/8.15.2) with ESMTP id 17RMp2kN901656; Fri, 27 Aug 2021 18:51:02 -0400 From: Tom Lane To: Adrian Klaver cc: Laurenz Albe , depesz@depesz.com, pgsql-general Subject: Re: Can we get rid of repeated queries from pg_dump? In-reply-to: <1fecd427-291e-5494-4b5e-0315f762f892@aklaver.com> References: <20210826084430.GA26282@depesz.com> <648517.1629986527@sss.pgh.pa.us> <20210826140827.GA15868@depesz.com> <649446.1629987629@sss.pgh.pa.us> <20210826160644.GA3120@depesz.com> <896732.1630099403@sss.pgh.pa.us> <1fecd427-291e-5494-4b5e-0315f762f892@aklaver.com> Comments: In-reply-to Adrian Klaver message dated "Fri, 27 Aug 2021 14:53:01 -0700" MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <901654.1630104662.1@sss.pgh.pa.us> Date: Fri, 27 Aug 2021 18:51:02 -0400 Message-ID: <901655.1630104662@sss.pgh.pa.us> List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk Adrian Klaver writes: > On 8/27/21 2:23 PM, Tom Lane wrote: >> Those queries are coming from getFormattedTypeName(), which is used >> for function arguments and the like. I'm not quite sure why Hubert >> is seeing 5000 such calls in a database with only ~100 functions; >> surely they don't all have an average of 50 arguments? > Could be. Maybe. I'm disturbed by the discrepancy between my result (about 10% of pg_dump's queries are these) and Hubert's (over 50% are). I'd like to know the reason for that before we push forward. regards, tom lane