Fixing Gatekeeper Row Cardinality Estimate Issues<\/a><\/p>\nIn the article I talk about a specific cardinality estimation issue you may see for relational data warehouse queries (specifically against star schemas) and a few recommended solutions that may help eliminate or at least reduce the overall impact to query plan quality and performance.<\/p>\n","protected":false},"excerpt":{"rendered":"
I wrote a new article for Simple-Talk that was published recently: Fixing Gatekeeper Row Cardinality Estimate Issues In the article I talk about a specific cardinality estimation issue you may see for relational data warehouse queries (specifically against star schemas) and a few recommended solutions that may help eliminate or at least reduce the overall […]<\/p>\n","protected":false},"author":7,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[42,28],"tags":[],"class_list":["post-467","post","type-post","status-publish","format-standard","hentry","category-cardinality-estimation","category-performance"],"yoast_head":"\n
Simple-Talk Article: \u201cFixing Gatekeeper Row Cardinality Estimate Issues\u201d - Joe Sack<\/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:\/\/www.sqlskills.com\/blogs\/joe\/simple-talk-article-fixing-gatekeeper-row-cardinality-estimate-issues\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Simple-Talk Article: \u201cFixing Gatekeeper Row Cardinality Estimate Issues\u201d - Joe Sack\" \/>\n<meta property=\"og:description\" content=\"I wrote a new article for Simple-Talk that was published recently: Fixing Gatekeeper Row Cardinality Estimate Issues In the article I talk about a specific cardinality estimation issue you may see for relational data warehouse queries (specifically against star schemas) and a few recommended solutions that may help eliminate or at least reduce the overall […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sqlskills.com\/blogs\/joe\/simple-talk-article-fixing-gatekeeper-row-cardinality-estimate-issues\/\" \/>\n<meta property=\"og:site_name\" content=\"Joe Sack\" \/>\n<meta property=\"article:published_time\" content=\"2012-11-14T05:20:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2013-12-30T03:16:26+00:00\" \/>\n<meta name=\"author\" content=\"Joseph Sack\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Joseph Sack\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/simple-talk-article-fixing-gatekeeper-row-cardinality-estimate-issues\/\",\"url\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/simple-talk-article-fixing-gatekeeper-row-cardinality-estimate-issues\/\",\"name\":\"Simple-Talk Article: \u201cFixing Gatekeeper Row Cardinality Estimate Issues\u201d - Joe Sack\",\"isPartOf\":{\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/#website\"},\"datePublished\":\"2012-11-14T05:20:00+00:00\",\"dateModified\":\"2013-12-30T03:16:26+00:00\",\"author\":{\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/#\/schema\/person\/533eb0113a15fb5a6e8067a49e4ae648\"},\"breadcrumb\":{\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/simple-talk-article-fixing-gatekeeper-row-cardinality-estimate-issues\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.sqlskills.com\/blogs\/joe\/simple-talk-article-fixing-gatekeeper-row-cardinality-estimate-issues\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/simple-talk-article-fixing-gatekeeper-row-cardinality-estimate-issues\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Cardinality Estimation\",\"item\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/category\/cardinality-estimation\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Simple-Talk Article: \u201cFixing Gatekeeper Row Cardinality Estimate Issues\u201d\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/#website\",\"url\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/\",\"name\":\"Joe Sack\",\"description\":\"SQL Server Performance Tuning, High Availability and Disaster Recovery Blog\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/#\/schema\/person\/533eb0113a15fb5a6e8067a49e4ae648\",\"name\":\"Joseph Sack\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.sqlskills.com\/blogs\/joe\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/a4b39a7719a6bfff1add3ec00527810734579ee114d6d983e8e68f937b77be96?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/a4b39a7719a6bfff1add3ec00527810734579ee114d6d983e8e68f937b77be96?s=96&d=mm&r=g\",\"caption\":\"Joseph Sack\"},\"description\":\"Joe Sack is a Principal Consultant with SQLskills. 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