{"id":6685,"date":"2025-01-02T13:01:29","date_gmt":"2025-01-02T13:01:29","guid":{"rendered":"https:\/\/test.opensource-db.in\/wp1\/?p=6685"},"modified":"2025-01-02T13:01:32","modified_gmt":"2025-01-02T13:01:32","slug":"understanding-replication-conflicts-in-postgresql","status":"publish","type":"post","link":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/","title":{"rendered":"Understanding Replication Conflicts in PostgreSQL"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">In any PostgreSQL production database environment, high availability is paramount. Streaming replication is a powerful feature that enables high availability by creating a standby node which is a replica of the primary database. It allows the standby node to serve <code>read-only<\/code> queries, offloading read traffic from the primary and improving overall system performance. It also provides disaster recovery capabilities, as the standby can act as a backup that\u2019s always up-to-date with the primary database. With such a setup, PostgreSQL provides a robust solution for businesses to handle large-scale workloads and ensure their applications remain operational even in case of hardware or software failures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Even though streaming replication is beneficial, it also brings you some challenges. One of the issues I&#8217;ve recently encountered in one of our client&#8217;s production environments is<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ERROR: canceling statement due to conflict with recovery\nDETAIL: User query might have needed to see row versions that must be removed.<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">We observed this issue when we were trying to run a query on one of the Standby nodes which is in streaming replication with Primary.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Common causes<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This error occurs when a <code>read-only<\/code> query on the standby node tries to access row versions that are about to be or have been removed during the recovery process. Essentially, the query is trying to read data that no longer exists on the replica because it\u2019s being cleaned up as part of the WAL recovery due to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Long-running queries on the Standby server.<\/li>\n\n\n\n<li>Replication Lag.<\/li>\n\n\n\n<li>Vacuuming of old rows.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">What is replication conflict?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">It is a type of Conflict that occurs only on the Standby server, and not on the Primary server. This issue occurs when the recovery process is unable to apply WAL information from Primary to Standby if it would interfere with query processing on the standby. There are some of the conflicts:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Tablespace conflict<\/strong> occurs if an expected temp tablespace is dropped on Primary which is a part of queries being processed on Standby.<\/li>\n\n\n\n<li><strong>Lock conflict<\/strong> occurs when you query a table on standby while the same table is being modified on the primary.<\/li>\n\n\n\n<li><strong>Snapshot conflict<\/strong> occurs when a backend process tries to access rows on the standby server that have been vacuumed out on the primary.<\/li>\n\n\n\n<li><strong>Deadlock conflict<\/strong> occurs due to query cancellations occurring because of deadlocks on standby.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">To monitor these replication conflicts, there is a <code>pg_catalog<\/code> view called <code>pg_stat_database_conflicts<\/code> . This view shows the statistics of the occurrence of query cancellation due to conflicts with recovery on the standby server as these conflicts don&#8217;t occur on the primary server. Here is the output of this view:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>postgres=# select * from pg_stat_database_conflicts;\n datid |  datname  | confl_tablespace | confl_lock | confl_snapshot | confl_bufferpin | confl_deadlock | confl_active_logicalslot \n-------+-----------+------------------+------------+----------------+-----------------+----------------+--------------------------\n     5 | postgres  |                0 |          0 |              0 |               0 |              0 |                        0\n 16469 | test      |                0 |          0 |              0 |               0 |              0 |                        0\n     1 | template1 |                0 |          0 |              0 |               0 |              0 |                        0\n     4 | template0 |                0 |          0 |              0 |               0 |              0 |                        0\n(4 rows)<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Here you can see that there are no conflicts on my local standby. If there is any occurrence of this issue, it will display as 1 in any of the columns that begin with &#8216;confl_&#8217; depending on the type of conflict.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How PostgreSQL handles these conflicts<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">PostgreSQL has a parameter\u00a0<code>max_standby_streaming_delay<\/code>\u00a0that determines what happens when\u00a0WAL\u00a0replay encounters a replication conflict. PostgreSQL suspends replay of the\u00a0WAL\u00a0information for at most\u00a0 <code>max_standby_streaming_delay<\/code>\u00a0milliseconds. If the conflicting query is still running after that time, PostgreSQL cancels it. Default value is <code>30 seconds<\/code> . If it is set to, this setting would be disabled.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How to Avoid<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To avoid replication conflicts, one simple option is to disable Hot Standby on the replica by setting <code>hot_standby = off<\/code>. This eliminates the chance of conflicts because the standby won&#8217;t process queries. However, this is only practical if the standby server is used exclusively for high availability and not for read queries.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To avoid <strong>lock conflicts<\/strong>, it&#8217;s important not to run queries that acquire an <code>ACCESS EXCLUSIVE<\/code> lock, such as <code>DROP TABLE<\/code>, <code>TRUNCATE<\/code>, or <code>ALTER TABLE<\/code>. A special case is <code>VACUUM<\/code> truncation, which can cause conflicts on the standby. While you can&#8217;t avoid the <code>ACCESS EXCLUSIVE<\/code> lock during VACUUM truncation, you can disable it for individual tables in the database.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">For <strong>snapshot conflicts<\/strong>, enabling <code>hot_standby_feedback<\/code> on the standby can help prevent the primary from removing tuples that the standby still needs to see. However, this can lead to table bloat on the primary due to long-running queries, so use it with caution.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Summary<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">In PostgreSQL, streaming replication is a vital feature for achieving high availability, data redundancy, and disaster recovery. While it offers many advantages, it also introduces challenges, particularly around replication conflicts that can occur on the standby server. The <strong>&#8220;canceling statement due to conflict with recovery&#8221;<\/strong> error is a common issue that arises when long-running queries or replication lag interferes with the WAL recovery process.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">By understanding the different types of replication conflicts such as lock conflicts &amp; snapshot conflicts, you can better manage and mitigate these issues. Monitoring tools like <code>pg_stat_database_conflicts<\/code> can help identify the occurrence of these conflicts and guide you in resolving them.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">To prevent replication conflicts, you can consider strategies like disabling, or avoiding certain types of queries that acquire exclusive locks, and enabling settings like <code>hot_standby_feedback<\/code>. However, each solution has its trade-offs, and it\u2019s crucial to strike a balance between performance and the prevention of conflicts. Ultimately, carefully managing replication, query performance, and system configuration will ensure your PostgreSQL setup remains robust, reliable, and efficient, even in the face of replication challenges.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In any PostgreSQL production database environment, high availability is paramount. Streaming replication is a powerful feature that enables high availability [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":6701,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1,23],"tags":[],"class_list":["post-6685","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-others","category-postgresql-14"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Understanding Replication Conflicts in PostgreSQL - OpenSource DB<\/title>\n<meta name=\"robots\" content=\"noindex, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Understanding Replication Conflicts in PostgreSQL - OpenSource DB\" \/>\n<meta property=\"og:description\" content=\"In any PostgreSQL production database environment, high availability is paramount. Streaming replication is a powerful feature that enables high availability [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/\" \/>\n<meta property=\"og:site_name\" content=\"OpenSource DB\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/people\/OpenSource-DB\/100072970755470\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-01-02T13:01:29+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-01-02T13:01:32+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png\" \/>\n\t<meta property=\"og:image:width\" content=\"3600\" \/>\n\t<meta property=\"og:image:height\" content=\"1890\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Venkat Akhil\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@opensource_db\" \/>\n<meta name=\"twitter:site\" content=\"@opensource_db\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Venkat Akhil\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/\"},\"author\":{\"name\":\"Venkat Akhil\",\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/#\/schema\/person\/a37b142ecbf953189a4f9209b0b8d328\"},\"headline\":\"Understanding Replication Conflicts in PostgreSQL\",\"datePublished\":\"2025-01-02T13:01:29+00:00\",\"dateModified\":\"2025-01-02T13:01:32+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/\"},\"wordCount\":831,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/#organization\"},\"image\":{\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png\",\"articleSection\":[\"Others\",\"PostgreSQL 14\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/\",\"url\":\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/\",\"name\":\"Understanding Replication Conflicts in PostgreSQL - OpenSource DB\",\"isPartOf\":{\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png\",\"datePublished\":\"2025-01-02T13:01:29+00:00\",\"dateModified\":\"2025-01-02T13:01:32+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#primaryimage\",\"url\":\"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png\",\"contentUrl\":\"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png\",\"width\":3600,\"height\":1890},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/test.opensource-db.in\/wp1\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Understanding Replication Conflicts in PostgreSQL\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/#website\",\"url\":\"https:\/\/test.opensource-db.in\/wp1\/\",\"name\":\"OpenSource DB\",\"description\":\"Your Trusted OpenSource Databases partner\",\"publisher\":{\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/test.opensource-db.in\/wp1\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/#organization\",\"name\":\"OPENSOURCE DB PRIVATE LIMITED\",\"url\":\"https:\/\/test.opensource-db.in\/wp1\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2021\/10\/osdb-logo-tm-2.png\",\"contentUrl\":\"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2021\/10\/osdb-logo-tm-2.png\",\"width\":368,\"height\":120,\"caption\":\"OPENSOURCE DB PRIVATE LIMITED\"},\"image\":{\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/people\/OpenSource-DB\/100072970755470\/\",\"https:\/\/x.com\/opensource_db\",\"https:\/\/www.youtube.com\/channel\/UCmTI5h\",\"https:\/\/www.linkedin.com\/company\/opensource-db\",\"https:\/\/www.instagram.com\/opensource_db\/\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/#\/schema\/person\/a37b142ecbf953189a4f9209b0b8d328\",\"name\":\"Venkat Akhil\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/test.opensource-db.in\/wp1\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/522c0947d21b2c2c89f10698fd9131f9db4110f65c8d02b53d9b4559c7650865?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/522c0947d21b2c2c89f10698fd9131f9db4110f65c8d02b53d9b4559c7650865?s=96&d=mm&r=g\",\"caption\":\"Venkat Akhil\"},\"url\":\"https:\/\/test.opensource-db.in\/wp1\/author\/sudheer-sopensource-db-com\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Understanding Replication Conflicts in PostgreSQL - OpenSource DB","robots":{"index":"noindex","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"og_locale":"en_US","og_type":"article","og_title":"Understanding Replication Conflicts in PostgreSQL - OpenSource DB","og_description":"In any PostgreSQL production database environment, high availability is paramount. Streaming replication is a powerful feature that enables high availability [&hellip;]","og_url":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/","og_site_name":"OpenSource DB","article_publisher":"https:\/\/www.facebook.com\/people\/OpenSource-DB\/100072970755470\/","article_published_time":"2025-01-02T13:01:29+00:00","article_modified_time":"2025-01-02T13:01:32+00:00","og_image":[{"width":3600,"height":1890,"url":"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png","type":"image\/png"}],"author":"Venkat Akhil","twitter_card":"summary_large_image","twitter_creator":"@opensource_db","twitter_site":"@opensource_db","twitter_misc":{"Written by":"Venkat Akhil","Est. reading time":"5 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#article","isPartOf":{"@id":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/"},"author":{"name":"Venkat Akhil","@id":"https:\/\/test.opensource-db.in\/wp1\/#\/schema\/person\/a37b142ecbf953189a4f9209b0b8d328"},"headline":"Understanding Replication Conflicts in PostgreSQL","datePublished":"2025-01-02T13:01:29+00:00","dateModified":"2025-01-02T13:01:32+00:00","mainEntityOfPage":{"@id":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/"},"wordCount":831,"commentCount":0,"publisher":{"@id":"https:\/\/test.opensource-db.in\/wp1\/#organization"},"image":{"@id":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#primaryimage"},"thumbnailUrl":"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png","articleSection":["Others","PostgreSQL 14"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/","url":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/","name":"Understanding Replication Conflicts in PostgreSQL - OpenSource DB","isPartOf":{"@id":"https:\/\/test.opensource-db.in\/wp1\/#website"},"primaryImageOfPage":{"@id":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#primaryimage"},"image":{"@id":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#primaryimage"},"thumbnailUrl":"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png","datePublished":"2025-01-02T13:01:29+00:00","dateModified":"2025-01-02T13:01:32+00:00","breadcrumb":{"@id":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#primaryimage","url":"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png","contentUrl":"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png","width":3600,"height":1890},{"@type":"BreadcrumbList","@id":"https:\/\/test.opensource-db.in\/wp1\/understanding-replication-conflicts-in-postgresql\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/test.opensource-db.in\/wp1\/"},{"@type":"ListItem","position":2,"name":"Understanding Replication Conflicts in PostgreSQL"}]},{"@type":"WebSite","@id":"https:\/\/test.opensource-db.in\/wp1\/#website","url":"https:\/\/test.opensource-db.in\/wp1\/","name":"OpenSource DB","description":"Your Trusted OpenSource Databases partner","publisher":{"@id":"https:\/\/test.opensource-db.in\/wp1\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/test.opensource-db.in\/wp1\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/test.opensource-db.in\/wp1\/#organization","name":"OPENSOURCE DB PRIVATE LIMITED","url":"https:\/\/test.opensource-db.in\/wp1\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/test.opensource-db.in\/wp1\/#\/schema\/logo\/image\/","url":"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2021\/10\/osdb-logo-tm-2.png","contentUrl":"https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2021\/10\/osdb-logo-tm-2.png","width":368,"height":120,"caption":"OPENSOURCE DB PRIVATE LIMITED"},"image":{"@id":"https:\/\/test.opensource-db.in\/wp1\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/people\/OpenSource-DB\/100072970755470\/","https:\/\/x.com\/opensource_db","https:\/\/www.youtube.com\/channel\/UCmTI5h","https:\/\/www.linkedin.com\/company\/opensource-db","https:\/\/www.instagram.com\/opensource_db\/"]},{"@type":"Person","@id":"https:\/\/test.opensource-db.in\/wp1\/#\/schema\/person\/a37b142ecbf953189a4f9209b0b8d328","name":"Venkat Akhil","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/test.opensource-db.in\/wp1\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/522c0947d21b2c2c89f10698fd9131f9db4110f65c8d02b53d9b4559c7650865?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/522c0947d21b2c2c89f10698fd9131f9db4110f65c8d02b53d9b4559c7650865?s=96&d=mm&r=g","caption":"Venkat Akhil"},"url":"https:\/\/test.opensource-db.in\/wp1\/author\/sudheer-sopensource-db-com\/"}]}},"rttpg_featured_image_url":{"full":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png",3600,1890,false],"landscape":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png",3600,1890,false],"portraits":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png",3600,1890,false],"thumbnail":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15-150x150.png",150,150,true],"medium":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15-300x158.png",300,158,true],"large":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15-1024x538.png",1024,538,true],"1536x1536":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15-1536x806.png",1536,806,true],"2048x2048":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15-2048x1075.png",2048,1075,true],"ultp_layout_landscape_large":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png",1200,630,false],"ultp_layout_landscape":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png",870,457,false],"ultp_layout_portrait":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png",600,315,false],"ultp_layout_square":["https:\/\/test.opensource-db.in\/wp1\/wp-content\/uploads\/2025\/01\/image-15.png",600,315,false]},"rttpg_author":{"display_name":"Venkat Akhil","author_link":"https:\/\/test.opensource-db.in\/wp1\/author\/sudheer-sopensource-db-com\/"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/test.opensource-db.in\/wp1\/category\/business\/others\/\" rel=\"category tag\">Others<\/a> <a href=\"https:\/\/test.opensource-db.in\/wp1\/category\/postgres\/postgresql-14\/\" rel=\"category tag\">PostgreSQL 14<\/a>","rttpg_excerpt":"In any PostgreSQL production database environment, high availability is paramount. Streaming replication is a powerful feature that enables high availability [&hellip;]","_links":{"self":[{"href":"https:\/\/test.opensource-db.in\/wp1\/wp-json\/wp\/v2\/posts\/6685","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/test.opensource-db.in\/wp1\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.opensource-db.in\/wp1\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.opensource-db.in\/wp1\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/test.opensource-db.in\/wp1\/wp-json\/wp\/v2\/comments?post=6685"}],"version-history":[{"count":8,"href":"https:\/\/test.opensource-db.in\/wp1\/wp-json\/wp\/v2\/posts\/6685\/revisions"}],"predecessor-version":[{"id":6700,"href":"https:\/\/test.opensource-db.in\/wp1\/wp-json\/wp\/v2\/posts\/6685\/revisions\/6700"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.opensource-db.in\/wp1\/wp-json\/wp\/v2\/media\/6701"}],"wp:attachment":[{"href":"https:\/\/test.opensource-db.in\/wp1\/wp-json\/wp\/v2\/media?parent=6685"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.opensource-db.in\/wp1\/wp-json\/wp\/v2\/categories?post=6685"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.opensource-db.in\/wp1\/wp-json\/wp\/v2\/tags?post=6685"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}