Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1uoTkd-004aXw-RG for pgsql-hackers@arkaria.postgresql.org; Tue, 19 Aug 2025 21:20:17 +0000 Received: from localhost ([127.0.0.1] helo=malur.postgresql.org) by malur.postgresql.org with esmtp (Exim 4.94.2) (envelope-from ) id 1uoTkc-00HAje-NG for pgsql-hackers@arkaria.postgresql.org; Tue, 19 Aug 2025 21:20:15 +0000 Received: from makus.postgresql.org ([2001:4800:3e1:1::229]) by malur.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1uoTkc-00HAjW-Dx for pgsql-hackers@lists.postgresql.org; Tue, 19 Aug 2025 21:20:15 +0000 Received: from mail-il1-x129.google.com ([2607:f8b0:4864:20::129]) by makus.postgresql.org with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.96) (envelope-from ) id 1uoTka-000jKI-2I for pgsql-hackers@postgresql.org; Tue, 19 Aug 2025 21:20:14 +0000 Received: by mail-il1-x129.google.com with SMTP id e9e14a558f8ab-3e57010c2bbso35353875ab.3 for ; Tue, 19 Aug 2025 14:20:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1755638412; x=1756243212; darn=postgresql.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=indrdySvG61SOJ3N5Kdog6WkDnRum+penr8ElXPAgmM=; b=R1FrdCV0qMbRSUs+j04XGQ8IfGoUGc0ELPd8poqkBaiRmWJf7/Vy0d02tiLZA1oUOJ CVFF1pmHGFxaOJPD0jJ1p3kLqDSLLJMC4l3KVI25qW8z1llriy2d+jduXwP2wutDzGMc t2cY3lxwPzPYLysKlanwI6Sz5ocBwjS68vgRJ9Y9L9n0bYf0xVeuowb8IQ2MfgfAywAS Tpc+IF+wbWVS2Wyj8ks+w09EiAxtgbki7lq/dwGqUBkuBw52w73p3CXxiAnSyJ2DXrkt 1hSCW163GSivrloLWn6aOf/AcI+gh06f1OVW2jfSIElAt266yovwn2HNLED2dD9UQ1Hz ysbA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755638412; x=1756243212; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=indrdySvG61SOJ3N5Kdog6WkDnRum+penr8ElXPAgmM=; b=hS7Fgld3DgZljUPRKZlTRy11hNSQFLTIkvM3wxj2jwmFUQXEvdc6lFHk9sYwXm0Og6 S8++d7xf6LQ25HuwRnZkdks9sTrks6L+TtoKd8jycZJQPenLBINFjudYt3E+v7pRyUHJ 3iT1fhVSpnwJG6nD+ptW6I9dm9teJsvbS+JsQB2NeoFjz6CS3ghsVYVPfQMdjx7SIIV4 IhQzH5uoFE12PBEoY1nzEYu0J6u5cdipH942dWetC/epbNWmYxnabxeQhaP/dY4O0VJ8 n4dmIoPj5KiUlZsi0Oy8gF6mVhxkpLBWhS+rpOj8q4BT8kML8a7+mE5B76tXlIPTd0nF DpmA== X-Forwarded-Encrypted: i=1; AJvYcCXyGiTWIlTLIl8GSdv0K/CX3rSFOWJjlUCuK6XzJU7EyxjY8nqo9IYCNhDBSUn7BH0uV+BTOkyNDQMLrxoI@postgresql.org X-Gm-Message-State: AOJu0Yzl0APdsfA2vyM1XJ5roiEO1tm3D39tBoI5Wb/C3Lx1y9BjAh6N OoS4Dx3AhaKzjX7FIcCj1lpfD4aWcF1R/3CLdmZVfOq1hBxnuLvacMrTWp1bgA== X-Gm-Gg: ASbGncsZFf2xTZHtEb9Kzr7HCF6X4QwVJIBkb8KcZpdMIrxTLx/CwYgqR1AfrfGCeYR XF0xANv/jnk85HpCJ4uIU5qn+roUqf8uwNW6FImNL8GA8QGF/sBbULs01Q3OvBCMqt1m6RqKht9 m8aNpGn/M+7sgzYFR85iVOETce2X9W8OafgYQiueLy94jpcIFRAiswU4mtKWE89JdEG1BOgCLRK 5NI71hsbPHf5Qr6myPxG+Lc9UkmODKNbJIMhzGWxLCyW7iJ45rnLdHPXrJYehDGoTQhULq0ErK9 MjAEgZXcI9LnqfGa7HjiDlEQUKe5rRxrwXZ6x45FAKGPTf+RH+lgz1e7E3KCXVQgMLdVqsNeEh5 iSBVss+4Pj59qX7oGHycnM2B25ARotLLK1tF1jYbb8/l8pL8yh0VyDRmVOyYGubtBHvFnu45ruM SZrKkzoaJCgnCR X-Google-Smtp-Source: AGHT+IHiXN+tgy/BIGtAEkVwaTUp7ZcRTPOaRTd3NK1RttlDUDVdN1WC3tV7LibMlPd5GxL8vPkFng== X-Received: by 2002:a92:c26b:0:b0:3e5:4db8:2f1a with SMTP id e9e14a558f8ab-3e67ca89dbamr9690955ab.11.1755638412551; Tue, 19 Aug 2025 14:20:12 -0700 (PDT) Received: from nathan (162-195-168-172.lightspeed.stlsmo.sbcglobal.net. [162.195.168.172]) by smtp.gmail.com with ESMTPSA id 8926c6da1cb9f-50c947f547bsm3784582173.43.2025.08.19.14.20.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 19 Aug 2025 14:20:12 -0700 (PDT) Date: Tue, 19 Aug 2025 16:20:10 -0500 From: Nathan Bossart To: Sami Imseih Cc: Tom Lane , Andres Freund , Bertrand Drouvot , Rahila Syed , pgsql-hackers Subject: Re: Improve LWLock tranche name visibility across backends Message-ID: References: <34drxi6kshtzu5aerftjflrm6wfxxw54emyvy4gqemdpxxuhvm@gymw6its72o7> <5to6tftuml6nkas4jaaljfzecasvslxq3mumeslh74wsol4mzw@rgxpxxlqqwtf> <876523.1755635201@sss.pgh.pa.us> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: List-Id: List-Help: List-Subscribe: List-Post: List-Owner: List-Archive: Archived-At: Precedence: bulk On Tue, Aug 19, 2025 at 04:16:26PM -0500, Sami Imseih wrote: > If there is agreement on setting limits, may I propose > 1024 tranches and NAMEDATALEN. Both seem reasonably sufficient. Let's proceed with that approach for now. We can worry about the exact limits once this is closer to commit. -- nathan