Received: from malur.postgresql.org ([217.196.149.56]) by arkaria.postgresql.org with esmtp (Exim 4.84_2) (envelope-from ) id 1axyRe-0004NH-ME for pgsql-admin@arkaria.postgresql.org; Wed, 04 May 2016 15:10:34 +0000 Received: from localhost ([127.0.0.1] helo=postgresql.org) by malur.postgresql.org with smtp (Exim 4.84_2) (envelope-from ) id 1axyRe-0005lV-8d for pgsql-admin@arkaria.postgresql.org; Wed, 04 May 2016 15:10:34 +0000 Received: from magus.postgresql.org ([2a02:c0:301:0:ffff::29]) by malur.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA384:256) (Exim 4.84_2) (envelope-from ) id 1axyPv-0000Jb-Vp for pgsql-admin@postgresql.org; Wed, 04 May 2016 15:08:48 +0000 Received: from mail-wm0-x230.google.com ([2a00:1450:400c:c09::230]) by magus.postgresql.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_CBC_SHA1:256) (Exim 4.84_2) (envelope-from ) id 1axyPl-00024H-BE for pgsql-admin@postgresql.org; Wed, 04 May 2016 15:08:47 +0000 Received: by mail-wm0-x230.google.com with SMTP id a17so99874655wme.0 for ; Wed, 04 May 2016 08:08:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=flexibee-eu.20150623.gappssmtp.com; s=20150623; h=to:from:subject:message-id:date:user-agent:mime-version :content-transfer-encoding; bh=UdyQWirsYkQ542bUSkkWZWnV9sd/O/UlEME474DbsO0=; b=W0Oq7InQazW0+N08gADwb3MoFkatXCBWEOa3usTRypJ9zQapGIHX76lzipko+wbkyE iqrsU8xN4xESjM/xmjt830kWSA2U4YQzO7mR0umVdFpplPL9cK1mU3RWz1WRbYM7i+/P DM7htY5TQ7Tjlb6gYVcMLVxfYG/xShz9vE28lTWByNtHlId1HD+vbh7tU/KmH84ma9sH xNweVNT03ryDBe0ztFdxR5n4hf9lfgiAtlhLCPMKhEm1T7YLyWKH2gPjn0kzMJZNCSCX UebSNaJuC6EWycnPbFlI0aDLOygYZ9n+qcaR3/g1njiWzgqdtbDk8cJV+B2MMQgGFTlr IilQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:to:from:subject:message-id:date:user-agent :mime-version:content-transfer-encoding; bh=UdyQWirsYkQ542bUSkkWZWnV9sd/O/UlEME474DbsO0=; b=iNYBvtwRRWJ023JuoWcK9HvTNe7OfVobcFiFr0lh0d+VNla/Zf+XnvYBaGVAbvKzaS MDa7+8YdK0sThPjDSdlNkpL5mO4QpiOFmmuzggfvuO0E477s21NlbsPzXDylpnKupmJK XEfr2nt0Byf+KKU9U6/P3GnZg3PiMAsAUjBL+4J3+jCJyMU5PmmZa6xu2ZsWWlbZqR6+ woWagMTgiasCflAyaRLLXdF/4rnvJK4LQKhRMLjA//30nwR8JxQOWaApD5eBQWK1DQFh 8H9uwEsyEOJLujZnir9na/WCBj09Jii6Jl20kfLX9IHhy2iOtISChtO+UeDVWIyaLpyg KPXQ== X-Gm-Message-State: AOPr4FW0p/wcsqnGows7rkc3UbO97jUBRrQawG71EccQt6mOYfIyeGROY6PUBqfV/w2RoDnS X-Received: by 10.28.91.17 with SMTP id p17mr9331020wmb.86.1462374516060; Wed, 04 May 2016 08:08:36 -0700 (PDT) Received: from osvetlik-nb.localdomain ([88.208.120.47]) by smtp.gmail.com with ESMTPSA id on2sm4720637wjc.32.2016.05.04.08.08.35 for (version=TLSv1/SSLv3 cipher=OTHER); Wed, 04 May 2016 08:08:35 -0700 (PDT) To: pgsql-admin@postgresql.org From: =?UTF-8?B?T25kxZllaiBTdsSbdGzDrWs=?= Subject: Autovacuum of pg_shdepend Message-ID: <572A1072.5080308@flexibee.eu> Date: Wed, 4 May 2016 17:08:34 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.7.1 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit X-Pg-Spam-Score: -2.6 (--) List-Archive: List-Help: List-ID: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: X-Mailing-List: pgsql-admin Precedence: bulk Sender: pgsql-admin-owner@postgresql.org Hello, we have a strange problem with autovacuum. We have three workers, but usually only one works and two are waiting as they are all trying to process table pg_shdepend which is shared between all databases. We have two clusters, both have a few thousands of databases. Because of this problem the autovacuum process can't keep up and the planner uses old data causing large impact on the performance. Is there a way to prevent this behaviour, please? With regards Ondřej Světlík -- Sent via pgsql-admin mailing list (pgsql-admin@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-admin