{"id":1159,"date":"2025-10-28T16:45:15","date_gmt":"2025-10-28T19:45:15","guid":{"rendered":"https:\/\/maurobernal.com.ar\/blog\/?p=1159"},"modified":"2025-10-28T16:45:18","modified_gmt":"2025-10-28T19:45:18","slug":"script-para-obtener-el-tamano-de-cada-tabla-e-indice-en-postgresql","status":"publish","type":"post","link":"https:\/\/maurobernal.com.ar\/blog\/script-para-obtener-el-tamano-de-cada-tabla-e-indice-en-postgresql\/","title":{"rendered":"script para obtener el tama\u00f1o de cada tabla e indice en Postgresql"},"content":{"rendered":"\n<p>Poder determinar como est\u00e1 compuesto el tama\u00f1o de una base de datos es una tarea fundamental en el rol de un DBA. Esto te permite identificar posibles errores de dise\u00f1o o segmentaciones futuras necesarias.<\/p>\n\n\n\n<p>Acontinuaci\u00f3n te dejo un script que suele serme \u00fat\u00edl cuando trabajo en motores PostgreSQL. En esta caso si bien lo he usado en su versi\u00f3n 16, tambi\u00e9n aplica para 17 y 18.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SELECT\n    n.nspname AS schema_name,\n    c.relname AS table_name,\n    CASE\n        WHEN c.relkind = 'r' THEN 'Tabla'\n        WHEN c.relkind = 'i' THEN '\u00cdndice'\n        WHEN c.relkind = 'm' THEN 'Vista Materializada'\n        ELSE c.relkind::text\n    END AS object_type,\n    -- Tama\u00f1o total (datos + \u00edndices) en Megabytes (MB)\n    ROUND((pg_total_relation_size(c.oid) \/ (1024.0 * 1024.0))::numeric, 2) AS total_size_mb,\n    -- Tama\u00f1o de la porci\u00f3n de datos o del \u00edndice en Megabytes (MB)\n    ROUND((pg_relation_size(c.oid) \/ (1024.0 * 1024.0))::numeric, 2) AS data_or_index_size_mb,\n    -- Tama\u00f1o de los \u00edndices asociados (solo para tablas) en Megabytes (MB)\n    CASE\n        WHEN c.relkind = 'r' THEN ROUND((pg_indexes_size(c.oid) \/ (1024.0 * 1024.0))::numeric, 2)\n        ELSE NULL\n    END AS indexes_size_mb,\n    c.reltuples::bigint AS row_count\nFROM\n    pg_class c\nLEFT JOIN\n    pg_namespace n ON n.oid = c.relnamespace\nWHERE\n    n.nspname NOT IN ('pg_catalog', 'information_schema', 'pg_toast')\n    AND c.relkind IN ('r', 'i', 'm')\nORDER BY\n    pg_total_relation_size(c.oid) DESC;<\/code><\/pre>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td>c<strong>olumna<\/strong><\/td><td><strong>descripci\u00f3n<\/strong><\/td><\/tr><tr><td>schema_name<\/td><td>Esquema al que pertenece la tabla o \u00edndice.<\/td><\/tr><tr><td>table_name<\/td><td>Nombre de la tabla, \u00edndice o vista materializada.<\/td><\/tr><tr><td>object_type<\/td><td>Tipo de objeto (&#8216;Tabla&#8217;, &#8216;\u00cdndice&#8217;, &#8216;Vista Materializada&#8217;).<\/td><\/tr><tr><td>total_size<\/td><td><strong>Tama\u00f1o total<\/strong> de la relaci\u00f3n (datos + \u00edndices + TOAST). Para \u00edndices es su tama\u00f1o.<\/td><\/tr><tr><td>table_or_index_size<\/td><td>Tama\u00f1o de la relaci\u00f3n <strong>sin sus \u00edndices<\/strong>. Para \u00edndices, es su tama\u00f1o.<\/td><\/tr><tr><td>indexes_size<\/td><td>Tama\u00f1o total de los <strong>\u00edndices asociados<\/strong> (solo aplica y se muestra para tablas).<\/td><\/tr><tr><td>row_count<\/td><td>Conteo de filas de la tabla (es una estimaci\u00f3n del cat\u00e1logo).<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image.png?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"839\" height=\"412\" src=\"https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image.png?resize=839%2C412&#038;ssl=1\" alt=\"\" class=\"wp-image-1160\" srcset=\"https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image.png?w=839&amp;ssl=1 839w, https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image.png?resize=300%2C147&amp;ssl=1 300w, https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image.png?resize=768%2C377&amp;ssl=1 768w, https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image.png?resize=705%2C346&amp;ssl=1 705w\" sizes=\"auto, (max-width: 839px) 100vw, 839px\" \/><\/a><\/figure>\n\n\n\n<p>Con el script adjunto obtendr\u00e1s una salida similar a esta:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image-1.png?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" width=\"1018\" height=\"255\" src=\"https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image-1.png?resize=1018%2C255&#038;ssl=1\" alt=\"\" class=\"wp-image-1161\" srcset=\"https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image-1.png?w=1018&amp;ssl=1 1018w, https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image-1.png?resize=300%2C75&amp;ssl=1 300w, https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image-1.png?resize=768%2C192&amp;ssl=1 768w, https:\/\/i0.wp.com\/maurobernal.com.ar\/blog\/wp-content\/uploads\/2025\/10\/image-1.png?resize=705%2C177&amp;ssl=1 705w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/a><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Poder determinar como est\u00e1 compuesto el tama\u00f1o de una base de datos es una tarea fundamental en el rol de un DBA. Esto te permite identificar posibles errores de dise\u00f1o&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1,229],"tags":[55,230,232,16],"class_list":["post-1159","post","type-post","status-publish","format-standard","hentry","category-blog","category-postgres","tag-dba","tag-postgres","tag-postgresql","tag-sql"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>script para obtener el tama\u00f1o de cada tabla e indice en Postgresql &#183; devops Mauro Bernal<\/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:\/\/maurobernal.com.ar\/blog\/script-para-obtener-el-tamano-de-cada-tabla-e-indice-en-postgresql\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"script para obtener el tama\u00f1o de cada tabla e indice en Postgresql &#183; devops Mauro Bernal\" \/>\n<meta property=\"og:description\" content=\"Poder determinar como est\u00e1 compuesto el tama\u00f1o de una base de datos es una tarea fundamental en el rol de un DBA. 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