{"id":6602,"date":"2015-12-22T19:46:51","date_gmt":"2015-12-22T18:46:51","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/how-fast-can-you-setup-a-standby-database-with-postgresql\/"},"modified":"2015-12-22T19:46:51","modified_gmt":"2015-12-22T18:46:51","slug":"how-fast-can-you-setup-a-standby-database-with-postgresql","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/how-fast-can-you-setup-a-standby-database-with-postgresql\/","title":{"rendered":"How fast can you setup a standby database with PostgreSQL?"},"content":{"rendered":"

While setting up a PostgreSQL infrastructure at customer today my colleague Pierre Sicot<\/a> and I discussed on how time consuming it is to setup standby databases if you compare different vendors. Lets make a challenge out of this. This is the baseline:<\/p>\n

    \n
  1. Install the product from scratch<\/li>\n
  2. Create a master database<\/li>\n
  3. Create a hot standby database (on the same host)<\/li>\n
  4. The standby database needs to be open read only<\/li>\n
  5. Create a table containing one record on the master<\/li>\n
  6. Verify that the table and the record is there on the standby<\/li>\n<\/ol>\n

    For this PostgreSQL demo I used the just released PostgreSQL 9.5 RC1<\/a>.<\/p>\n

    This is the script:<\/p>\n

    \npostgres@oel7:\/home\/postgres\/ [dummy] cat create_standby_from_scratch.sh \n#!\/bin\/bash\n\nBASE=$HOME\nSOURCE=\"${HOME}\/postgresql-9.5rc1.tar.bz2\"\nPGHHOME=\"${HOME}\/pg95rc\"\n\nMASTERDATADIR=\"${HOME}\/pgmaster\"\nSTANDBYDATADIR=\"${HOME}\/pgstandby\"\n\nPATH=${PHOME}\/bin:$PATH\nexport PATH\n\npg_ctl stop -D ${HOME}\/pgstandby -m fast\npg_ctl stop -D ${HOME}\/pgmaster -m fast\n\nrm -rf ${PGHHOME}\nrm -rf ${HOME}\/postgresql-9.5rc1}\nrm -rf ${MASTERDATADIR}\nrm -rf ${STANDBYDATADIR}\n\n# configure, compile and install\ncd ${HOME}\ntar -axf ${SOURCE}\ncd ${HOME}\/postgresql-9.5rc1\n.\/configure --prefix=${PGHHOME} \nmake world\nmake install\n\nPATH=${PHOME}\/bin:$PATH\nexport PATH\n\n# initialze the master postgresql cluster\ninitdb -D ${MASTERDATADIR}\necho \"listen_addresses = '*'\" > ${MASTERDATADIR}\/postgresql.conf\necho \"port=7777\" >> ${MASTERDATADIR}\/postgresql.conf\necho \"wal_level='hot_standby'\" >> ${MASTERDATADIR}\/postgresql.conf\necho \"max_replication_slots=3\" >> ${MASTERDATADIR}\/postgresql.conf\necho \"max_wal_senders=3\" >> ${MASTERDATADIR}\/postgresql.conf\npg_ctl start -D ${MASTERDATADIR}\nsleep 2\npsql -p 7777 -c \"select * from pg_create_physical_replication_slot('test');\" postgres\npg_ctl stop -D ${MASTERDATADIR} -m fast\n\n# prepare the primary\nmkdir ${STANDBYDATADIR}\nchmod 700 ${STANDBYDATADIR}\ncp -pr ${MASTERDATADIR}\/* ${STANDBYDATADIR}\/\necho \"standby_mode = 'on'\" > ${STANDBYDATADIR}\/recovery.conf\necho \"primary_slot_name = 'test' \" >> ${STANDBYDATADIR}\/recovery.conf \necho \"primary_conninfo = 'user=postgres port=7777 host=localhost'\" >> ${STANDBYDATADIR}\/recovery.conf\necho \"recovery_target_timeline = 'latest'\" >> ${STANDBYDATADIR}\/recovery.conf\necho \"port=7778\" >> ${STANDBYDATADIR}\/postgresql.conf\necho \"hot_standby='on'\" >> ${STANDBYDATADIR}\/postgresql.conf\necho \"host    replication     postgres        ::1\/128            trust\" >> ${MASTERDATADIR}\/pg_hba.conf\n\npg_ctl start -D ${MASTERDATADIR}\nsleep 2\npg_ctl start -D ${STANDBYDATADIR}\n\n## create a sample table on the master\npsql -p 7777 -c \"create table t1 ( a int );\" postgres\npsql -p 7777 -c \"insert into t1 values (1);\" postgres\nsleep 1\n# check the table on the standby\npsql -p 7778 -c \"select * from t1;\" postgres\n<\/pre>\n
    And this is the result (in a VirtualBox VM on my notebook, not a big server):<\/p>\n
    \npostgres@oel7:\/home\/postgres\/ [dummy] time .\/create_standby_from_scratch.sh\n...\nLOG:  autovacuum launcher started\nserver starting\nCREATE TABLE\nINSERT 0 1\nLOG:  database system was shut down at 2015-12-22 19:41:20 GMT\nLOG:  entering standby mode\nLOG:  consistent recovery state reached at 0\/1718740\nLOG:  record with zero length at 0\/1718740\nLOG:  database system is ready to accept read only connections\nLOG:  started streaming WAL from primary at 0\/1000000 on timeline 1\nLOG:  redo starts at 0\/1718740\n a \n---\n 1\n(1 row)\n...\nreal\t0m50.061s\nuser\t0m8.908s\nsys\t0m4.796s\n<\/pre>\n
    Less than a minute. The battle is open \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"
    While setting up a PostgreSQL infrastructure at customer today my colleague Pierre Sicot and I discussed on how time consuming it is to setup standby databases if you compare different vendors. Lets make a challenge out of this. This is the baseline: Install the product from scratch Create a master database Create a hot standby […]<\/p>\n","protected":false},"author":28,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[229],"tags":[77],"type_dbi":[],"class_list":["post-6602","post","type-post","status-publish","format-standard","hentry","category-database-administration-monitoring","tag-postgresql"],"acf":[],"yoast_head":"\nHow fast can you setup a standby database with PostgreSQL? - dbi Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.dbi-services.com\/blog\/how-fast-can-you-setup-a-standby-database-with-postgresql\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How fast can you setup a standby database with PostgreSQL?\" \/>\n<meta property=\"og:description\" content=\"While setting up a PostgreSQL infrastructure at customer today my colleague Pierre Sicot and I discussed on how time consuming it is to setup standby databases if you compare different vendors. 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