{"id":3618,"date":"2018-10-07T19:27:27","date_gmt":"2018-10-07T19:27:27","guid":{"rendered":"https:\/\/dbtut.com\/?p=3618"},"modified":"2019-03-25T14:13:58","modified_gmt":"2019-03-25T14:13:58","slug":"postgresql-list-of-table-sizes","status":"publish","type":"post","link":"https:\/\/dbtut.com\/index.php\/2018\/10\/07\/postgresql-list-of-table-sizes\/","title":{"rendered":"How To Find the Size of Tables and Indexes in PostgreSQL"},"content":{"rendered":"<p>As with most database systems, PostgreSQL offers us various system functions to easily calculate the disk size of the objects. We can get the size of a table using these functions. These functions;<\/p>\n<p><strong>pg_table_size:<\/strong> The size of a table, excluding indexes.<br \/>\n<strong>pg_total_relation_size:<\/strong> Total size of a table.<br \/>\n<strong>pg_relation_size:<\/strong> The size of an object (table index, etc.) on disk. It is possible to get more detailed information from this function with additional parameters.<br \/>\n<strong>pg_size_pretty:<\/strong> Other functions return results in bytes. Converts this into readable format (kb, mb, gb)<\/p>\n<h2>Find the Size of a Table<\/h2>\n<p>index (primary key) in size_test_table. We get the table size as follows;<\/p>\n<pre class=\"lang:default decode:true\">SELECT pg_table_size('size_test_table') AS data_size,\npg_relation_size('size_test_table_pkey') AS index_size,\npg_table_size('size_test_table') + pg_relation_size('size_test_table_pkey') AS total_size1,\npg_total_relation_size('size_test_table') AS total_size2;<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"http:\/\/www.veritabani.gen.tr\/wp-content\/uploads\/2017\/01\/989.png\" width=\"622\" height=\"303\" \/><\/p>\n<p>Let&#8217;s show it better;<\/p>\n<pre class=\"lang:default decode:true\">SELECT pg_size_pretty(pg_total_relation_size('size_test_table'));<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/dbtut.com\/wp-content\/uploads\/2018\/10\/235.png\" width=\"624\" height=\"153\" \/><\/p>\n<h3>Find the Size of all Tables in a Database<\/h3>\n<p>The indexes of a table in PostgreSQL can be in different tablespace (on different disk if desired).<\/p>\n<pre class=\"lang:default decode:true\">WITH tbl_spc AS (\nSELECT ts.spcname AS spcname\nFROM pg_tablespace ts \nJOIN pg_database db ON db.dattablespace = ts.oid\nWHERE db.datname = current_database()\n)\n(\nSELECT\nt.schemaname,\nt.tablename,\npg_table_size('\"' || t.schemaname || '\".\"' || t.tablename || '\"') AS table_disc_size,\nNULL as index,\n0 as index_disc_size,\nCOALESCE(t.tablespace, ts.spcname) AS tablespace\nFROM pg_tables t, tbl_spc ts\n\nUNION ALL\n\nSELECT\ni.schemaname,\ni.tablename,\n0,\ni.indexname,\npg_relation_size('\"' || i.schemaname || '\".\"' || i.indexname || '\"'),\nCOALESCE(i.tablespace, ts.spcname)\nFROM pg_indexes i, tbl_spc ts\n)\nORDER BY table_disc_size DESC,index_disc_size DESC;<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-11026 aligncenter\" src=\"https:\/\/dbtut.com\/wp-content\/uploads\/2018\/10\/Ads\u0131z-2.png\" alt=\"\" width=\"649\" height=\"355\" \/><\/p>\n<p>You can create a view from the query above and query from view;<\/p>\n<pre class=\"lang:default decode:true\">CREATE OR REPLACE VIEW v_disc_spaces AS\nWITH tbl_spc AS (\nSELECT ts.spcname AS spcname\nFROM pg_tablespace ts \nJOIN pg_database db ON db.dattablespace = ts.oid\nWHERE db.datname = current_database()\n)\n(\nSELECT\nt.schemaname,\nt.tablename,\npg_table_size('\"' || t.schemaname || '\".\"' || t.tablename || '\"') AS table_disc_size,\nNULL as index,\n0 as index_disc_size,\nCOALESCE(t.tablespace, ts.spcname) AS tablespace\nFROM pg_tables t, tbl_spc ts\n\nUNION ALL\n\nSELECT\ni.schemaname,\ni.tablename,\n0,\ni.indexname,\npg_relation_size('\"' || i.schemaname || '\".\"' || i.indexname || '\"'),\nCOALESCE(i.tablespace, ts.spcname)\nFROM pg_indexes i, tbl_spc ts\n);<\/pre>\n<h3>All tables in a schema are listed in alphabetical order;<\/h3>\n<pre class=\"lang:default decode:true\">SELECT tablename,\npg_size_pretty(sum(table_disc_size)) AS table_disc_size,\npg_size_pretty(sum(index_disc_size)) AS index_disc_size\nFROM v_disc_spaces\nWHERE schemaname = 'public'\nGROUP BY tablename\nORDER BY tablename;<\/pre>\n<h3><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-11024 aligncenter\" src=\"https:\/\/dbtut.com\/wp-content\/uploads\/2018\/10\/Ads\u0131z.png\" alt=\"\" width=\"602\" height=\"248\" \/><\/h3>\n<h3>Total size of the biggest 10 tables;<\/h3>\n<pre class=\"lang:default decode:true\">SELECT\nt.tablename,\npg_size_pretty(pg_total_relation_size('\"' || t.schemaname || '\".\"' || t.tablename || '\"')) AS table_total_disc_size\nFROM pg_tables t\nWHERE\nt.schemaname = 'public'\nORDER BY\npg_total_relation_size('\"' || t.schemaname || '\".\"' || t.tablename || '\"') DESC\nLIMIT 10;<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-11027 aligncenter\" src=\"https:\/\/dbtut.com\/wp-content\/uploads\/2018\/10\/Ads\u0131z-3.png\" alt=\"\" width=\"610\" height=\"146\" \/><\/p>\n<p>In addition, we could list tables using pg_class instead of pg_tables. Now it&#8217;s your creativity.<\/p>\n<p>If you want to list the databases by their size, you should read the following article.<\/p>\n<p>&#8220;<a href=\"https:\/\/dbtut.com\/index.php\/2018\/06\/03\/how-to-find-the-size-of-all-databases-in-postgresql\/\" target=\"_blank\" rel=\"noopener noreferrer\">How to Find The Size of all Databases in PostgreSQL<\/a>&#8221;<\/p>\n\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_3618\" class=\"pvc_stats all  \" data-element-id=\"3618\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/dbtut.com\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>As with most database systems, PostgreSQL offers us various system functions to easily calculate the disk size of the objects. We can get the size of a table using these functions. These functions; pg_table_size: The size of a table, excluding indexes. pg_total_relation_size: Total size of a table. pg_relation_size: The size of an object (table index, &hellip;<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_3618\" class=\"pvc_stats all  \" data-element-id=\"3618\" style=\"\"><i class=\"pvc-stats-icon medium\" aria-hidden=\"true\"><svg aria-hidden=\"true\" focusable=\"false\" data-prefix=\"far\" data-icon=\"chart-bar\" role=\"img\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 512 512\" class=\"svg-inline--fa fa-chart-bar fa-w-16 fa-2x\"><path fill=\"currentColor\" d=\"M396.8 352h22.4c6.4 0 12.8-6.4 12.8-12.8V108.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v230.4c0 6.4 6.4 12.8 12.8 12.8zm-192 0h22.4c6.4 0 12.8-6.4 12.8-12.8V140.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v198.4c0 6.4 6.4 12.8 12.8 12.8zm96 0h22.4c6.4 0 12.8-6.4 12.8-12.8V204.8c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v134.4c0 6.4 6.4 12.8 12.8 12.8zM496 400H48V80c0-8.84-7.16-16-16-16H16C7.16 64 0 71.16 0 80v336c0 17.67 14.33 32 32 32h464c8.84 0 16-7.16 16-16v-16c0-8.84-7.16-16-16-16zm-387.2-48h22.4c6.4 0 12.8-6.4 12.8-12.8v-70.4c0-6.4-6.4-12.8-12.8-12.8h-22.4c-6.4 0-12.8 6.4-12.8 12.8v70.4c0 6.4 6.4 12.8 12.8 12.8z\" class=\"\"><\/path><\/svg><\/i> <img loading=\"lazy\" decoding=\"async\" width=\"16\" height=\"16\" alt=\"Loading\" src=\"https:\/\/dbtut.com\/wp-content\/plugins\/page-views-count\/ajax-loader-2x.gif\" border=0 \/><\/p>\n<div class=\"pvc_clear\"><\/div>\n","protected":false},"author":384,"featured_media":11028,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[5],"tags":[2862,2858,2857,2865,2861,2863,2860,2856,2868,2869,2866,2867,2864],"class_list":["post-3618","post","type-post","status-publish","format-standard","has-post-thumbnail","","category-postgres","tag-check-the-size-of-tables-and-objects-in-postgresql","tag-find-the-size-of-a-table-in-postgresql","tag-find-the-size-of-all-tables-in-postgresql-database","tag-how-do-i-list-tables-in-postgresql","tag-how-do-i-view-tables-in-postgresql","tag-how-to-get-table-and-index-sizes-in-postgresql","tag-list-all-tables-in-a-postgresql-database","tag-list-all-tables-on-a-database","tag-list-and-order-tables-by-size-in-postgresql","tag-list-tables-by-their-size-in-postgresql","tag-show-tables-in-postgresql","tag-table-size-command-in-postgresql","tag-table-size-in-postgresql"],"aioseo_notices":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - 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