{"id":18549,"date":"2025-01-27T14:28:23","date_gmt":"2025-01-27T14:28:23","guid":{"rendered":"https:\/\/unp.education\/content\/?p=18549"},"modified":"2025-01-27T14:28:23","modified_gmt":"2025-01-27T14:28:23","slug":"what-are-three-examples-of-deadlocks-in-dbms","status":"publish","type":"post","link":"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/","title":{"rendered":"Understanding Deadlock in DBMS: Three Key Examples"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"18549\" class=\"elementor elementor-18549\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b72286f e-flex e-con-boxed e-con e-parent\" data-id=\"b72286f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a9faa8c elementor-widget elementor-widget-heading\" data-id=\"a9faa8c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_81 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#What_Are_Three_Examples_of_Deadlocks\" >What Are Three Examples of Deadlocks?<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Understanding_Deadlock_in_DBMS\" >Understanding Deadlock in DBMS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Unlock_Your_Business_Intelligence_Potential_with_Power_BI\" >Unlock Your Business Intelligence Potential with Power BI!<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Unlock_Your_Business_Intelligence_Potential_with_Power_BI-2\" >Unlock Your Business Intelligence Potential with Power BI!<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Example_1_Circular_Wait\" >Example 1: Circular Wait<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Example_2_Hold_and_Wait\" >Example 2: Hold and Wait<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Example_3_No_Preemption\" >Example 3: No Preemption<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#How_to_Detect_and_Resolve_Deadlocks\" >How to Detect and Resolve Deadlocks<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Preventing_Deadlocks_in_DBMS\" >Preventing Deadlocks in DBMS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Common_Tools_to_Handle_Deadlocks\" >Common Tools to Handle Deadlocks<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#FAQs\" >FAQs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Unlock_Your_Business_Intelligence_Potential_with_Power_BI-3\" >Unlock Your Business Intelligence Potential with Power BI!<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Unlock_Your_Business_Intelligence_Potential_with_Power_BI-4\" >Unlock Your Business Intelligence Potential with Power BI!<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/#Our_Students_Testimonials\" >Our Students Testimonials:<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h1 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"What_Are_Three_Examples_of_Deadlocks\"><\/span>What Are Three Examples of Deadlocks?<span class=\"ez-toc-section-end\"><\/span><\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-96355f5 elementor-widget elementor-widget-text-editor\" data-id=\"96355f5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Deadlock in DBMS is a concept every database administrator and developer needs to understand thoroughly. Imagine you\u2019re stuck in a gridlock on a busy road where no car can move forward or backward\u2014deadlocks in a database are no different. In this article, we\u2019ll explore the three most common examples of deadlocks, their causes, and how to prevent them.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b2e1a5b e-flex e-con-boxed e-con e-parent\" data-id=\"b2e1a5b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-aaaea9b elementor-widget elementor-widget-heading\" data-id=\"aaaea9b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Understanding_Deadlock_in_DBMS\"><\/span>Understanding Deadlock in DBMS<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-18028da elementor-widget elementor-widget-heading\" data-id=\"18028da\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What is a Deadlock?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-841e1b3 elementor-widget elementor-widget-text-editor\" data-id=\"841e1b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A deadlock occurs when processes block each other by holding onto resources the other processes need. Think of it like two people trying to pass through a narrow hallway simultaneously\u2014they\u2019re both stuck until one steps aside. In DBMS, this can cripple your database operations, leading to frustration and delays.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4728486 elementor-widget elementor-widget-heading\" data-id=\"4728486\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Key Terms Related to Deadlocks<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-81d2f83 elementor-widget elementor-widget-text-editor\" data-id=\"81d2f83\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><strong>Resource Locking<\/strong>: The process of securing a resource for exclusive use.<\/li><li><strong>Mutual Exclusion<\/strong>: Ensuring only one process uses a resource at any given time.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-401091ec elementor-hidden-mobile e-flex e-con-boxed e-con e-parent\" data-id=\"401091ec\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-5e84ae05 e-con-full e-flex e-con e-child\" data-id=\"5e84ae05\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-175e6aaf e-con-full e-flex e-con e-child\" data-id=\"175e6aaf\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-36dd9be2 elementor-widget elementor-widget-heading\" data-id=\"36dd9be2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Unlock_Your_Business_Intelligence_Potential_with_Power_BI\"><\/span>Unlock Your Business Intelligence Potential with Power BI!<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4de52995 elementor-widget elementor-widget-heading\" data-id=\"4de52995\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-default\">Take the next step in your data career with our 6-week comprehensive course, 'Mastering Business Intelligence with Power BI'.\nReady to transform your data skills? 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elementor-size-default\">Take the next step in your data career with our 6-week comprehensive course, 'Mastering Business Intelligence with Power BI'.\nReady to transform your data skills? Enroll Now and elevate your career with UNP Education!<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5d130c8c e-con-full e-flex e-con e-child\" data-id=\"5d130c8c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-447ff8f8 elementor-widget elementor-widget-button\" data-id=\"447ff8f8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/unp.education\/course-overview\/mastering-buisness-intelligence-with-power-bi\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Join Now<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-65e4e210 elementor-widget elementor-widget-button\" data-id=\"65e4e210\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/unp.education\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Browse Course<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-dbb9dd2 e-flex e-con-boxed e-con e-parent\" data-id=\"dbb9dd2\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-20fd8b2 elementor-widget elementor-widget-heading\" data-id=\"20fd8b2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Example_1_Circular_Wait\"><\/span>Example 1: Circular Wait<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f2bcfc1 elementor-widget elementor-widget-heading\" data-id=\"f2bcfc1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What Causes Circular Wait?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b25564c elementor-widget elementor-widget-text-editor\" data-id=\"b25564c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Circular wait occurs when processes form a cycle where each one is waiting for a resource held by the next in the circle. It\u2019s like playing musical chairs, but no one moves.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-95005ba elementor-widget elementor-widget-heading\" data-id=\"95005ba\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Real-Life Example in Databases<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8a70c75 elementor-widget elementor-widget-text-editor\" data-id=\"8a70c75\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Imagine Transaction A holds Resource 1 and needs Resource 2, while Transaction B holds Resource 2 and needs Resource 1. This circular dependency causes both transactions to halt indefinitely.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-99e92ff e-flex e-con-boxed e-con e-parent\" data-id=\"99e92ff\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ac1f664 elementor-widget elementor-widget-heading\" data-id=\"ac1f664\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Example_2_Hold_and_Wait\"><\/span>Example 2: Hold and Wait<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a978c33 elementor-widget elementor-widget-heading\" data-id=\"a978c33\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">How Hold and Wait Leads to Deadlock<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c4b8ff8 elementor-widget elementor-widget-text-editor\" data-id=\"c4b8ff8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Hold and wait happens when a process is holding one resource and waiting to acquire additional ones. This leaves the resources in limbo, blocking other processes.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c852074 elementor-widget elementor-widget-heading\" data-id=\"c852074\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Illustration in DBMS<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-66f088d elementor-widget elementor-widget-text-editor\" data-id=\"66f088d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Consider a scenario where a transaction locks a table for writing but also needs access to another table locked by a different transaction. Neither can proceed, resulting in a deadlock.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-ee2dcd0 e-flex e-con-boxed e-con e-parent\" data-id=\"ee2dcd0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a7d4468 elementor-widget elementor-widget-heading\" data-id=\"a7d4468\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Example_3_No_Preemption\"><\/span>Example 3: No Preemption<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-62c2785 elementor-widget elementor-widget-heading\" data-id=\"62c2785\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What is No Preemption in Deadlocks?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d182ea2 elementor-widget elementor-widget-text-editor\" data-id=\"d182ea2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>No preemption means a resource cannot be forcibly taken from a process\u2014it must be voluntarily released. This can lead to a standstill when processes refuse to let go.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3dbb4d1 elementor-widget elementor-widget-heading\" data-id=\"3dbb4d1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Practical DBMS Scenario<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0c2381c elementor-widget elementor-widget-text-editor\" data-id=\"0c2381c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>For instance, if a process locks a critical row and doesn\u2019t release it due to an error, other dependent processes will remain stuck.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-20681ea e-flex e-con-boxed e-con e-parent\" data-id=\"20681ea\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-c400f73 elementor-widget elementor-widget-heading\" data-id=\"c400f73\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"How_to_Detect_and_Resolve_Deadlocks\"><\/span>How to Detect and Resolve Deadlocks<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-999880f elementor-widget elementor-widget-heading\" data-id=\"999880f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Deadlock Detection Techniques<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c1356b3 elementor-widget elementor-widget-text-editor\" data-id=\"c1356b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><strong>Wait-for Graph<\/strong>: A visual representation of resource allocation.<\/li><li><strong>Deadlock Detection Algorithms<\/strong>: Algorithms used to identify cycles indicating deadlocks<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-04cfeab elementor-widget elementor-widget-heading\" data-id=\"04cfeab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Methods to Resolve Deadlocks<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ed6c9e5 elementor-widget elementor-widget-text-editor\" data-id=\"ed6c9e5\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li><strong>Transaction Rollback<\/strong>: Reverting one or more processes to free up resources.<\/li><li><strong>Resource Reallocation<\/strong>: Adjusting the allocation to break the cycle.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d16c2e9 e-flex e-con-boxed e-con e-parent\" data-id=\"d16c2e9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4410a5c elementor-widget elementor-widget-heading\" data-id=\"4410a5c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Preventing_Deadlocks_in_DBMS\"><\/span>Preventing Deadlocks in DBMS<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5e2acf9 elementor-widget elementor-widget-heading\" data-id=\"5e2acf9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Deadlock Prevention Techniques<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d1c5bd9 elementor-widget elementor-widget-text-editor\" data-id=\"d1c5bd9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Avoid circular waits by enforcing resource acquisition in a specific order.<\/li><li>Limit the number of resources a process can hold.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b691267 elementor-widget elementor-widget-heading\" data-id=\"b691267\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Best Practices for Database Management<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d49c9d6 elementor-widget elementor-widget-text-editor\" data-id=\"d49c9d6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Regularly monitor your database.<\/li><li>Use timeout settings to automatically resolve potential deadlocks.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-bad8528 e-flex e-con-boxed e-con e-parent\" data-id=\"bad8528\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-618d07e elementor-widget elementor-widget-heading\" data-id=\"618d07e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Common_Tools_to_Handle_Deadlocks\"><\/span>Common Tools to Handle Deadlocks<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1548039 elementor-widget elementor-widget-heading\" data-id=\"1548039\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Built-in DBMS Features<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-143268c elementor-widget elementor-widget-text-editor\" data-id=\"143268c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>MySQL\u2019s <strong>InnoDB<\/strong> automatically detects and resolves deadlocks.<\/li><li>SQL Server\u2019s <strong>Deadlock Graph<\/strong> offers visual insights.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0a61b21 elementor-widget elementor-widget-heading\" data-id=\"0a61b21\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Third-Party Tools<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c7cf53b elementor-widget elementor-widget-text-editor\" data-id=\"c7cf53b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<ul><li>Tools like <strong>SolarWinds Database Performance Analyzer<\/strong> can identify and prevent deadlocks efficiently.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5732f6d e-flex e-con-boxed e-con e-parent\" data-id=\"5732f6d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-9403fa7 elementor-widget elementor-widget-heading\" data-id=\"9403fa7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0231ffe elementor-widget elementor-widget-text-editor\" data-id=\"0231ffe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Deadlocks in DBMS can be challenging but are manageable with the right strategies. <strong>Understanding examples like circular wait, hold and wait, and no preemption can help you identify and resolve them proactively.<\/strong> Always keep your database processes streamlined to avoid unnecessary conflicts.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7c2cb98 e-flex e-con-boxed e-con e-parent\" data-id=\"7c2cb98\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4ef5a0e elementor-widget elementor-widget-heading\" data-id=\"4ef5a0e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3b35de1 elementor-widget elementor-widget-text-editor\" data-id=\"3b35de1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<h4>What is a deadlock in DBMS in simple terms?<\/h4><p>A deadlock occurs when two or more processes block each other by holding onto resources the other processes need. Think of it as a standstill in traffic.<\/p><h4>How does circular wait lead to a deadlock?<\/h4><p>Circular wait creates a loop where each process is waiting for a resource held by the next, resulting in a stalemate.<\/p><h4>Can deadlocks occur in distributed databases?<\/h4><p>Yes, deadlocks can occur in distributed databases due to resource contention across nodes.<\/p><h4>What tools can help detect deadlocks?<\/h4><p>Tools like <strong>SQL Server Deadlock Graph<\/strong> and <strong>SolarWinds DPA<\/strong> are great for detection.<\/p><h4>How can I prevent deadlocks as a beginner in DBMS?<\/h4><p>Start by implementing resource acquisition order and using timeout settings to avoid conflicts.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-7b070bb0 elementor-hidden-mobile e-flex e-con-boxed e-con e-parent\" data-id=\"7b070bb0\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-3028ad22 e-con-full e-flex e-con e-child\" data-id=\"3028ad22\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t<div class=\"elementor-element elementor-element-9a6e57f e-con-full e-flex e-con e-child\" data-id=\"9a6e57f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-50bae6b7 elementor-widget elementor-widget-heading\" data-id=\"50bae6b7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\"><span class=\"ez-toc-section\" id=\"Unlock_Your_Business_Intelligence_Potential_with_Power_BI-3\"><\/span>Unlock Your Business Intelligence Potential with Power BI!<span class=\"ez-toc-section-end\"><\/span><\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-54b80554 elementor-widget elementor-widget-heading\" data-id=\"54b80554\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<span class=\"elementor-heading-title elementor-size-default\">Take the next step in your data career with our 6-week comprehensive course, 'Mastering Business Intelligence with Power BI'.\nReady to transform your data skills? 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elementor-element-6ec15cd e-con-full e-flex e-con e-child\" data-id=\"6ec15cd\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-ded1dec e-con-full e-flex e-con e-child\" data-id=\"ded1dec\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-267c0cb2 elementor-widget elementor-widget-video\" data-id=\"267c0cb2\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/iALhOYlbkCQ?si=N8pEWOfhvEVPyEub&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3dc32895 e-con-full e-flex e-con e-child\" data-id=\"3dc32895\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7765b828 elementor-widget elementor-widget-video\" data-id=\"7765b828\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;youtube_url&quot;:&quot;https:\\\/\\\/youtu.be\\\/BGv6TJxGizc?si=N6C5kh1xYnG8b8Zr&quot;,&quot;video_type&quot;:&quot;youtube&quot;,&quot;controls&quot;:&quot;yes&quot;}\" data-widget_type=\"video.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-wrapper elementor-open-inline\">\n\t\t\t<div class=\"elementor-video\"><\/div>\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>What Are Three Examples of Deadlocks? Deadlock in DBMS is a concept every database administrator and developer needs to understand thoroughly. Imagine you\u2019re stuck in a gridlock on a busy road where no car can move forward or backward\u2014deadlocks in a database are no different. In this article, we\u2019ll explore the three most common examples &#8230; <a title=\"Understanding Deadlock in DBMS: Three Key Examples\" class=\"read-more\" href=\"https:\/\/unp.education\/content\/what-are-three-examples-of-deadlocks-in-dbms\/\" aria-label=\"Read more about Understanding Deadlock in DBMS: Three Key Examples\">Read more<\/a><\/p>\n","protected":false},"author":7951,"featured_media":18555,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"gallery","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-18549","post","type-post","status-publish","format-gallery","has-post-thumbnail","hentry","category-interview-preparation","post_format-post-format-gallery"],"_links":{"self":[{"href":"https:\/\/unp.education\/content\/wp-json\/wp\/v2\/posts\/18549","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unp.education\/content\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unp.education\/content\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unp.education\/content\/wp-json\/wp\/v2\/users\/7951"}],"replies":[{"embeddable":true,"href":"https:\/\/unp.education\/content\/wp-json\/wp\/v2\/comments?post=18549"}],"version-history":[{"count":8,"href":"https:\/\/unp.education\/content\/wp-json\/wp\/v2\/posts\/18549\/revisions"}],"predecessor-version":[{"id":18559,"href":"https:\/\/unp.education\/content\/wp-json\/wp\/v2\/posts\/18549\/revisions\/18559"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/unp.education\/content\/wp-json\/wp\/v2\/media\/18555"}],"wp:attachment":[{"href":"https:\/\/unp.education\/content\/wp-json\/wp\/v2\/media?parent=18549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unp.education\/content\/wp-json\/wp\/v2\/categories?post=18549"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unp.education\/content\/wp-json\/wp\/v2\/tags?post=18549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}