{"id":2192,"date":"2019-08-22T10:08:02","date_gmt":"2019-08-22T10:08:02","guid":{"rendered":"https:\/\/www.testpreptraining.com\/tutorial\/?page_id=2192"},"modified":"2020-05-02T07:40:11","modified_gmt":"2020-05-02T07:40:11","slug":"cloudwatch-basics","status":"publish","type":"page","link":"https:\/\/www.testpreptraining.ai\/tutorial\/aws-devops-engineer\/cloudwatch-basics\/","title":{"rendered":"CloudWatch Basics"},"content":{"rendered":"\n<p><strong>Amazon CloudWatch monitors <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>AWS resources <\/li><li>applications running on AWS <\/li><\/ul>\n\n\n\n<p><strong>CloudWatch <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>collects and tracks metrics, for AWS resources\nand applications. <\/li><li>CloudWatch home page displays metrics about\nevery AWS service in use.<\/li><li>Can create custom dashboards to display metrics <\/li><li>Create alarms to watch metrics and send\nnotifications or <\/li><li>Alarms can automatically make changes to the\nresources under monitoring against a threshold <\/li><\/ul>\n\n\n\n<p><strong>Access CloudWatch by <\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Amazon CloudWatch console \u2013 <a rel=\"noreferrer noopener\" href=\"https:\/\/console.aws.amazon.com\/cloudwatch\/\" target=\"_blank\">https:\/\/console.aws.amazon.com\/cloudwatch\/<\/a><\/li><li>AWS CLI&nbsp; <\/li><li>CloudWatch API <\/li><li>AWS SDKs <\/li><\/ul>\n\n\n\n<p><strong>CloudWatch Namespaces<\/strong><\/p>\n\n\n\n<p>A cloudwatch namespace is <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>It is a container for CloudWatch metrics. <\/li><li>Metrics in different namespaces are isolated\nfrom each other, <\/li><li>There is no default namespace. <\/li><li>Must specify a namespace for each data point to\nbe published to CloudWatch. <\/li><li>You can specify a namespace name when you create\na metric. <\/li><li>These names must contain valid XML characters, <\/li><li>Be fewer than 256 characters in length. <\/li><li>Possible characters are: alphanumeric characters\n(0-9A-Za-z), period (.), hyphen (-), underscore (_), forward slash (\/), hash\n(#), and colon (:).<\/li><li>The AWS namespaces, naming convention: AWS\/service <\/li><\/ul>\n\n\n\n<p><strong>CloudWatch Dimensions<\/strong><\/p>\n\n\n\n<p>A dimension <\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>is a name\/value pair <\/li><li>part of the identity of a metric. <\/li><li>Can assign up to 10 dimensions to a metric.<\/li><li>Used to describe characteristic of a metric<\/li><li>Also used to filter the results that CloudWatch\nreturns <\/li><li>For few AWS services like EC2, CloudWatch can\naggregate data across dimensions<\/li><li>Example &#8211; Server=Producton,Domain=City01<\/li><\/ul>\n\n\n\n<p><strong>CloudWatch Statistics<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>It is metric data aggregations over specified\nperiods of time. <\/li><li>Aggregations use the namespace, metric name,\ndimensions, and the data point unit of measure, within the specified time\nperiod. <\/li><\/ul>\n\n\n\n<p><strong>Available statistics<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>Minimum&nbsp; &#8211; lowest value observed during the specified period. Tells, when low activity<\/li><li>Maximum &#8211; highest value observed during the specified period. Tells, when high activity<\/li><li>Sum &#8211; All values submitted for the matching metric added together. Tells, total activity<\/li><li>Average &#8211; The value of Sum \/ SampleCount during the specified period. <\/li><li>SampleCount&nbsp; &#8211; The count (number) of data points used for the statistical calculation.<\/li><li>pNN.NN&nbsp; &#8211; Value of specified percentile up to 2 decimal places like p95.45. Not for negative value&nbsp;metrics. <\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Amazon CloudWatch monitors AWS resources applications running on AWS CloudWatch collects and tracks metrics, for AWS resources and applications. CloudWatch home page displays metrics about every AWS service in use. Can create custom dashboards to display metrics Create alarms to watch metrics and send notifications or Alarms can automatically make changes to the resources under&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":2084,"menu_order":27,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"categories":[2],"tags":[7,400,372,380],"class_list":["post-2192","page","type-page","status-publish","hentry","category-amazon-aws","tag-aws","tag-cloudwatch-basics","tag-devops","tag-devops-engineer"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CloudWatch Basics - Testprep Training Tutorials<\/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.testpreptraining.ai\/tutorial\/aws-devops-engineer\/cloudwatch-basics\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CloudWatch Basics - Testprep Training Tutorials\" \/>\n<meta property=\"og:description\" content=\"Amazon CloudWatch monitors AWS resources applications running on AWS CloudWatch collects and tracks metrics, for AWS resources and applications. 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