{"id":655,"date":"2018-07-06T20:52:45","date_gmt":"2018-07-06T20:52:45","guid":{"rendered":"http:\/\/dbtut.com\/?p=655"},"modified":"2020-10-02T08:42:49","modified_gmt":"2020-10-02T08:42:49","slug":"fatal-could-not-create-semaphores-no-space-left-on-device","status":"publish","type":"post","link":"https:\/\/dbtut.com\/index.php\/2018\/07\/06\/fatal-could-not-create-semaphores-no-space-left-on-device\/","title":{"rendered":"FATAL: could not create semaphores: No space left on device"},"content":{"rendered":"<p>If you increase the value of the MAX_Connections parameter in the postgresql.conf file, you can get this error while starting the PostgreSQL service.<\/p>\n<p>You should read article titled &#8220;<a href=\"http:\/\/dbtut.com\/index.php\/2018\/06\/30\/fatal-remaining-connection-slots-are-reserved-for-non-replication-superuser-connections\/\" target=\"_blank\" rel=\"noopener noreferrer\">FATAL: remaining connection slots are reserved for non-replication superuser connections<\/a>&#8221; for increasing the MAX_Connection parameter.<\/p>\n<p>You can see the current semaphore values \u200b\u200bwhen you run one of the following commands while you are root user.<\/p>\n<pre class=\"lang:default decode:true\">cat\u00a0 \/proc\/sys\/kernel\/sem<\/pre>\n<pre class=\"lang:default decode:true\">ipcs -ls<\/pre>\n<pre class=\"lang:default decode:true \">sysctl -p<\/pre>\n\n<h3>The Solution of the Error:<\/h3>\n<p>We enter the sysctl.conf file with the following command.<\/p>\n<pre class=\"lang:default decode:true\">vi \/etc\/sysctl.conf<\/pre>\n<p>Then we come to an empty line and press the insert key from the keyboard to add the following line to this file.<\/p>\n<pre class=\"lang:default decode:true\">kernel.sem = 50100 128256000 50100 2560<\/pre>\n<p>To save the file and exit, press Esc, wq, Enter, respectively.<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_655\" class=\"pvc_stats all  \" data-element-id=\"655\" 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>If you increase the value of the MAX_Connections parameter in the postgresql.conf file, you can get this error while starting the PostgreSQL service. You should read article titled &#8220;FATAL: remaining connection slots are reserved for non-replication superuser connections&#8221; for increasing the MAX_Connection parameter. You can see the current semaphore values \u200b\u200bwhen you run one of &hellip;<\/p>\n<div class=\"pvc_clear\"><\/div>\n<p id=\"pvc_stats_655\" class=\"pvc_stats all  \" data-element-id=\"655\" 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":1,"featured_media":0,"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":[730,727,637,728,589,731,726,220,729],"class_list":["post-655","post","type-post","status-publish","format-standard","","category-postgres","tag-proc-sys-kernel-sem","tag-could-not-create-semaphores","tag-fatal-could-not-create-semaphores-no-space-left-on-device","tag-kernel-sem","tag-max_connections","tag-max_connections-parameter","tag-no-space-left-on-device","tag-postgresql-conf","tag-sysctl-conf"],"aioseo_notices":[],"a3_pvc":{"activated":true,"total_views":3509,"today_views":0},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - 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