{"id":37497,"date":"2025-10-10T08:00:00","date_gmt":"2025-10-10T06:00:00","guid":{"rendered":"https:\/\/www.dbi-services.com\/blog\/?p=37497"},"modified":"2025-12-25T18:12:45","modified_gmt":"2025-12-25T17:12:45","slug":"mongodb-log-analysis-a-comprehensive-guide","status":"publish","type":"post","link":"https:\/\/www.dbi-services.com\/blog\/mongodb-log-analysis-a-comprehensive-guide\/","title":{"rendered":"MongoDB Log Analysis : A Comprehensive Guide"},"content":{"rendered":"\n<p>Contrary to other DBMS, <strong><a href=\"https:\/\/www.dbi-services.com\/technologies\/mongodb\/\" target=\"_blank\" rel=\"noreferrer noopener\">MongoDB<\/a><\/strong> self-managed deployments generate <strong>logs in a JSON format<\/strong>, which can be quite intimidating at first. But instead of hoping to never have to look at the logs, you can use some <strong>tools and tips to navigate them<\/strong> more easily and not waste time finding the information you&#8217;re looking for.<\/p>\n\n\n\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>Table of contents<\/h2><ul><li><a href=\"#log-format-overview\" data-level=\"2\">Log format overview<\/a><\/li><li><a href=\"#querying-logs-with-mongosh\" data-level=\"2\">Querying logs through mongosh<\/a><\/li><li><a href=\"#navigating-logs-with-jq\" data-level=\"2\">Navigating through the logs with jq<\/a><\/li><li><a href=\"#h-conclusion\" data-level=\"2\">Conclusion<\/a><\/li><\/ul><\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"log-format-overview\">Log format overview<\/h2>\n\n\n\n<p>Inside <code>\/var\/log\/mongodb\/mongod.log<\/code> (or a custom path if you set one), a typical log entry looks like this (shortened, for readability) :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\"t\":{\"$date\":\"2025-03-06T14:54:28.298+01:00\"},\"s\":\"I\",&nbsp; \"c\":\"CONTROL\",&nbsp; \"id\":8423403, \"ctx\":\"initandlisten\",\"msg\":\"mongod startup complete\",\"attr\":{\"Summary of time elapsed\":{\"Startup from clean shutdown?\":false,\"Statistics\":{\"Set up periodic runner\":\"0 ms\",\"Set up online certificate status protocol manager\":\"0 ms\",&#091;...],\"Start transport layer\":\"0 ms\",\"_initAndListen total elapsed time\":\"626 ms\"}}}}<\/code><\/pre>\n\n\n\n<p>At first glance, it&#8217;s pretty difficult to extract the essential information, but let&#8217;s see how the document looks like when it&#8217;s formatted (we&#8217;ll see how to do that later).<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\n&nbsp; \"t\": {\n&nbsp;&nbsp;&nbsp; \"$date\": \"2025-03-06T14:54:28.298+01:00\"\n&nbsp; },\n&nbsp; \"s\": \"I\",\n&nbsp; \"c\": \"CONTROL\",\n&nbsp; \"id\": 8423403,\n&nbsp; \"ctx\": \"initandlisten\",\n&nbsp; \"msg\": \"mongod startup complete\",\n&nbsp; \"attr\": {\n&nbsp;&nbsp;&nbsp; \"Summary of time elapsed\": {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \"Startup from clean shutdown?\": false,\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \"Statistics\": {\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \"Set up periodic runner\": \"0 ms\",\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \"Set up online certificate status protocol manager\": \"0 ms\",\n        &#091;...] # lines hidden\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \"Start transport layer\": \"0 ms\",\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; \"_initAndListen total elapsed time\": \"626 ms\"\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }\n&nbsp;&nbsp;&nbsp; }\n&nbsp; }\n}<\/code><\/pre>\n\n\n\n<p>Here is a description of the main fields of the log document :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>t<\/code> : Timestamp of the log entry.<\/li>\n\n\n\n<li><code>s<\/code> : Severity code associated with the log entry (<code>E<\/code> for error, <code>W<\/code> for warning, <code>I<\/code> for information and <code>D1<\/code> to <code>D5<\/code> for debug).<\/li>\n\n\n\n<li><code>c<\/code> : Category of the log entry. Most common categories are <code>CONTROL<\/code>, <code>COMMAND<\/code>, <code>ELECTION<\/code>, <code>REPL<\/code> (for replication) or <code>NETWORK<\/code>. An extensive list is available in the <a href=\"https:\/\/www.mongodb.com\/docs\/manual\/reference\/log-messages\" target=\"_blank\" rel=\"noreferrer noopener\">official MongoDB documentation<\/a>.<\/li>\n\n\n\n<li><code>id<\/code> : Unique log entry ID.<\/li>\n\n\n\n<li><code>ctx<\/code> : Thread that generated the log.<\/li>\n\n\n\n<li><code>msg<\/code> : Usually a short message describing the log.<\/li>\n\n\n\n<li><code>attr<\/code> : Optional additional attributes.<\/li>\n<\/ul>\n\n\n\n<p>This will help us when looking at the logs, first with <code>mongosh<\/code>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"querying-logs-with-mongosh\">Querying logs through <code>mongosh<\/code><\/h2>\n\n\n\n<p>You can query logs inside the MongoDB shell called <code>mongosh<\/code>. To do so, use the <code>getLog<\/code> admin command :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>db.adminCommand({ getLog: \"global\"}); \/\/ display all log entries<\/code><\/pre>\n\n\n\n<p>Another useful option is to view startup warnings, which will only display warning logs since last startup.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>db.adminCommand({ getLog: \"startupWarnings\" }) \/\/ display startup warnings\n{\n&nbsp; totalLinesWritten: 2,\n&nbsp; log: &#091;\n&nbsp;&nbsp;&nbsp; '{\"t\":{\"$date\":\"2025-03-07T08:32:41.005+01:00\"},\"s\":\"W\",&nbsp; \"c\":\"NETWORK\",&nbsp; \"id\":5123300, \"ctx\":\"initandlisten\",\"msg\":\"vm.max_map_count is too low\",\"attr\":{\"currentValue\":65530,\"recommendedMinimum\":102400,\"maxConns\":51200},\"tags\":&#091;\"startupWarnings\"]}\\n',\n&nbsp;&nbsp;&nbsp; '{\"t\":{\"$date\":\"2025-03-07T08:32:41.005+01:00\"},\"s\":\"W\",&nbsp; \"c\":\"CONTROL\",&nbsp; \"id\":8386700, \"ctx\":\"initandlisten\",\"msg\":\"We suggest setting swappiness to 0 or 1, as swapping can cause performance problems.\",\"attr\":{\"sysfsFile\":\"\/proc\/sys\/vm\/swappiness\",\"currentValue\":60},\"tags\":&#091;\"startupWarnings\"]}\\n'\n&nbsp; ],\n&nbsp; ok: 1\n}<\/code><\/pre>\n\n\n\n<p>Even though this can sometimes be useful, it requires <strong>authenticated access<\/strong> to the database, and it only works when the <code>mongod<\/code> <strong>process is running<\/strong>. You won&#8217;t be able to use this method when the database crashes, for instance. Moreover, the logs are difficult to read.<\/p>\n\n\n\n<p>Most of the time, you will be better served by the <code>jq<\/code> utility.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"navigating-logs-with-jq\">Navigating through the logs with <code>jq<\/code><\/h2>\n\n\n\n<p><a href=\"https:\/\/jqlang.org\/manual\/\" target=\"_blank\" rel=\"noreferrer noopener\"><code>jq<\/code><\/a> is a <strong>powerful utility<\/strong> that helps you navigate JSON documents, and even though it is not an official MongoDB product, you should <strong>always integrate<\/strong> it in your MongoDB deployments.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-prettify-mongodb-logs\">Prettify MongoDB logs<\/h4>\n\n\n\n<p>The first benefit of the <code>jq<\/code> command is to display MongoDB logs in a readable format :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&gt; head -1 mongod.log | jq\n{\n&nbsp; \"t\": {\n&nbsp;&nbsp;&nbsp; \"$date\": \"2025-03-05T14:44:28.531+01:00\"\n&nbsp; },\n&nbsp; \"s\": \"I\",\n&nbsp; \"c\": \"CONTROL\",\n&nbsp; \"id\": 23285,\n&nbsp; \"ctx\": \"main\",\n&nbsp; \"msg\": \"Automatically disabling TLS 1.0\"\n}<\/code><\/pre>\n\n\n\n<p>Of course, a single line of log will now span multiple lines in the output. But thanks to the log structure explained above, we can write our first queries with <code>jq<\/code> to filter the results and only display what&#8217;s important.<\/p>\n\n\n\n<p>I would definitely recommend to <strong>build aliases<\/strong> with the following commands in order to quickly access the information that you find more valuable in the logs.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-display-error-messages\"><strong>Display error messages<\/strong><\/h4>\n\n\n\n<p>By using the <code>s<\/code> field (severity), we can filter the logs to only display error messages. This is especially useful when failing to start a MongoDB instance.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jq 'select(.s == \"E\")' mongod.log<\/code><\/pre>\n\n\n\n<p>You can also include warnings by slightly modifying the command.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jq 'select(.s == \"E\" or .s == \"W\")' mongod.log<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-filtering-displayed-fields\"><strong>Filtering displayed fields<\/strong><\/h4>\n\n\n\n<p>When selecting fields, you should pipe the <code>jq<\/code> filtering to a JSON object like this one :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{time: .t&#091;\"$date\"], message: .msg, error: .attr.error}<\/code><\/pre>\n\n\n\n<p>From now on, I will use the <code>-c<\/code> option to display the JSON in the compact format. Even in this format, logs can be readable when you select or exclude specific fields. Here, I want to select the <code>.t[\"$date\"]<\/code>, <code>.msg<\/code> and <code>.attr.error<\/code> fields. To improve the display, I will rename them :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&gt; jq -c 'select(.s == \"E\") | {time: .t&#091;\"$date\"], message: .msg, error: .attr.error}' mongod.log\n{\"time\":\"2025-03-05T14:44:28.665+01:00\",\"message\":\"WiredTiger error message\",\"error\":13}\n{\"time\":\"2025-03-05T14:44:28.665+01:00\",\"message\":\"WiredTiger error message\",\"error\":13}\n{\"time\":\"2025-03-05T14:44:28.665+01:00\",\"message\":\"WiredTiger error message\",\"error\":13}\n{\"time\":\"2025-03-06T10:17:07.383+01:00\",\"message\":\"DBException in initAndListen, terminating\",\"error\":\"Location28596: Unable to determine status of lock file in the data directory \/var\/lib\/mongodb: boost::filesystem::status: Permission denied &#091;system:13]: \\\"\/var\/lib\/mongodb\/mongod.lock\\\"\"}<\/code><\/pre>\n\n\n\n<p>Similarly, you can exclude a field with the <code>del<\/code> function. For instance, this will remove the <code>message<\/code> sub-field located inside the <code>attr<\/code> field.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jq 'del(.attr.message)' mongod.log<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-errors-and-warnings-grouped-by-messag-e\"><strong>Errors and warnings grouped by messag<\/strong>e<\/h4>\n\n\n\n<p>To check for recurrent warnings or errors, you can pipe the <code>jq<\/code> output to group the results by <code>msg<\/code> content.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jq 'select(.s == \"E\" or .s==\"W\") | .msg' mongod.log | sort | uniq -c | sort -nr | head<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-occurrences-of-each-log-severity\"><strong>Occurrences of each log severity<\/strong><\/h4>\n\n\n\n<p>If you want to quickly look for the number of every severity, you can do so with the <code>s<\/code> field.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&gt; jq '.s' mongod.log | sort | uniq -c\n&nbsp;&nbsp;&nbsp;&nbsp; 10 \"E\"\n&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 3 \"F\"\n&nbsp;&nbsp; 1727 \"I\"\n     88 \"W\"<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-view-logs-for-specific-log-categories\"><strong>View logs for specific log categories<\/strong><\/h4>\n\n\n\n<p>As mentioned before, the category of the logs might be interesting to filter (only the replication logs, for instance).<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jq -c 'select(.c == \"REPL\")' mongod.log<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-filter-logs-by-date\"><strong>Filter logs by date<\/strong><\/h4>\n\n\n\n<p>Whether you use log rotation or not, you might want to quickly access the last minutes\/hours\/days of logs. With the <code>date<\/code> utility, you can retrieve the most recent logs :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jq -c --arg since \"$(date -d '10 minutes ago' +%Y-%m-%dT%H:%M:%S)\" 'select(.t&#091;\"$date\"] &gt;= $since)' mongod.log<\/code><\/pre>\n\n\n\n<p>Still filtering on the <code>.t[\"$date\"]<\/code> field, you can also extract a portion of the logs :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jq -c 'select(.t&#091;\"$date\"] &gt;= \"2025-03-06T14:30:00\" and .t&#091;\"$date\"] &lt;= \"2025-03-06T14:40:00\")' mongod.log<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-look-for-a-specific-pattern-in-the-log\"><strong>Look for a specific pattern in the log<\/strong><\/h4>\n\n\n\n<p>Of course, you can always use <code>grep<\/code> followed by <code>jq<\/code> to find a pattern in the logs : <kbd>grep -i \"pattern\" mongod.log | jq<\/kbd><\/p>\n\n\n\n<p>But if you want to look for a specific pattern inside a specific field, you can do so with the <code>test<\/code> function :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&gt; jq -c 'select(.msg | test(\"failed to authenticate\"; \"i\"))' mongod.log \/\/ (i option for case insensitivity)\n{\"t\":{\"$date\":\"2025-03-07T08:37:52.950+01:00\"},\"s\":\"I\",\"c\":\"ACCESS\",\"id\":5286307,\"ctx\":\"conn18\",\"msg\":\"Failed to authenticate\",\"attr\":{\"client\":\"xxx.xxx.xxx.xxx(ip):xxxxx(port)\",\"isSpeculative\":true,\"isClusterMember\":false,\"mechanism\":\"SCRAM-SHA-256\",\"user\":\"root\",\"db\":\"admin\",\"error\":\"AuthenticationFailed: SCRAM authentication failed, storedKey mismatch\",\"result\":18,\"metrics\":{\"conversation_duration\":{\"micros\":5091,\"summary\":{\"0\":{\"step\":1,\"step_total\":2,\"duration_micros\":62},\"1\":{\"step\":2,\"step_total\":2,\"duration_micros\":48}}}},\"extraInfo\":{}}}<\/code><\/pre>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"h-check-for-logs-regarding-connections-to-the-mongodb-database\"><strong>Check for logs regarding connections to the MongoDB database<\/strong><\/h4>\n\n\n\n<p>For filtering connections logs, search for the <code>attr.remote<\/code> field :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jq -c 'select(.attr.remote)' mongod.log<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Analyzing slow queries with <code>jq<\/code><\/h2>\n\n\n\n<p>Inside the Mongo shell, you can activate logging for slow queries with <code>db.setProfilingLevel(1, &lt;slowms&gt;)<\/code>, with <code>&lt;slowms&gt;<\/code> being the threshold (in milliseconds) to log such queries.<\/p>\n\n\n\n<p><strong>Warnings<\/strong> related to slow queries in MongoDB :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Once activated, the slow queries logging could <strong>slow down the database<\/strong>, so be very careful when activating it.<\/li>\n\n\n\n<li>There is a <strong>security threat<\/strong> when combining slow query logging and <strong>queryable encryption<\/strong>, since queries will not be encrypted in the <code>mongod.log<\/code> file.<\/li>\n<\/ul>\n\n\n\n<p>Slow query logs look like this :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>{\n&nbsp; \"t\": { \"$date\": \"2024-03-06T12:34:56.789Z\" },\n&nbsp; \"s\": \"I\",\n&nbsp; \"c\": \"COMMAND\",\n&nbsp; \"id\": 123,\n&nbsp; \"ctx\": \"conn20\",\n&nbsp; \"msg\": \"Slow query\",\n&nbsp; \"attr\": {\n&nbsp;&nbsp;&nbsp; \"ns\": \"mydb.coll\",\n&nbsp;&nbsp;&nbsp; \"command\": { \"find\": \"coll\", \"filter\": { \"status\": \"active\" } },\n&nbsp;&nbsp;&nbsp; \"planSummary\": \"COLLSCAN\",\n&nbsp;&nbsp;&nbsp; \"keysExamined\": 0,\n&nbsp;&nbsp;&nbsp; \"docsExamined\": 5000,\n&nbsp;&nbsp;&nbsp; \"numYields\": 0,\n&nbsp;&nbsp;&nbsp; \"reslen\": 2000,\n&nbsp;&nbsp;&nbsp; \"locks\": { \"Global\": { \"acquireCount\": { \"r\": 1 } } },\n&nbsp;&nbsp;&nbsp; \"durationMillis\": 150\n&nbsp; }\n}<\/code><\/pre>\n\n\n\n<p>With this in mind, and with what we have already seen, you can filter the logs with the fields you want, like <code>attr.durationMillis<\/code> (duration of the query, in milliseconds), or <code>attr.ns<\/code>, which is the object on which the query is made.<\/p>\n\n\n\n<p>For instance, if you want to retrieve slow queries above a given threshold (one second, in the example below) :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jq 'select(.attr.durationMillis &gt;= 1000)' mongod.log<\/code><\/pre>\n\n\n\n<p>Or if you want to filter slow queries on a specific database <code>mydb<\/code> and collection <code>coll<\/code> :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jq 'select(.msg == \"Slow query\" and .attr.ns == \"mydb.coll\")' mongod.log<\/code><\/pre>\n\n\n\n<p>You can also select only queries that are run on a given database <code>mydb<\/code> :<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>jq 'select(.msg == \"Slow query\" and .attr.command&#091;\"$db\"] == \"mydb\")' mongod.log\n<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-conclusion\">Conclusion<\/h2>\n\n\n\n<p>While being a bit complex at first sight, MongoDB logs are very useful if you know how to apprehend them. By leveraging the <code>jq<\/code> utility for advanced filtering, and combining it with monitoring tools, you can efficiently analyze logs and improve your efficiency as a DBA.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Contrary to other DBMS, MongoDB self-managed deployments generate logs in a JSON format, which can be quite intimidating at first. But instead of hoping to never have to look at the logs, you can use some tools and tips to navigate them more easily and not waste time finding the information you&#8217;re looking for. Log [&hellip;]<\/p>\n","protected":false},"author":152,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[229,368,3788,1739],"tags":[3572,708,3573,694,890,3689,3571,2961,3574,44],"type_dbi":[],"class_list":["post-37497","post","type-post","status-publish","format-standard","hentry","category-database-administration-monitoring","category-development-performance","category-mongodb","category-nosql","tag-analysis","tag-automation","tag-jq","tag-json","tag-log","tag-metrics","tag-mongo","tag-mongodb","tag-slow-queries","tag-troubleshooting"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.2 (Yoast SEO v27.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>MongoDB Log Analysis : A Comprehensive Guide - dbi Blog<\/title>\n<meta name=\"description\" content=\"Log analysis in MongoDB : leverage the jq utility to query your logs, extract the important information and improve your efficiency as a DBA.\" \/>\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.dbi-services.com\/blog\/mongodb-log-analysis-a-comprehensive-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"MongoDB Log Analysis : A Comprehensive Guide\" \/>\n<meta property=\"og:description\" content=\"Log analysis in MongoDB : leverage the jq utility to query your logs, extract the important information and improve your efficiency as a DBA.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.dbi-services.com\/blog\/mongodb-log-analysis-a-comprehensive-guide\/\" \/>\n<meta property=\"og:site_name\" content=\"dbi Blog\" \/>\n<meta property=\"article:published_time\" content=\"2025-10-10T06:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-12-25T17:12:45+00:00\" \/>\n<meta name=\"author\" content=\"Julien Delattre\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Julien Delattre\" \/>\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:\/\/www.dbi-services.com\/blog\/mongodb-log-analysis-a-comprehensive-guide\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/mongodb-log-analysis-a-comprehensive-guide\/\"},\"author\":{\"name\":\"Julien Delattre\",\"@id\":\"https:\/\/www.dbi-services.com\/blog\/#\/schema\/person\/764ab019cc9dec42655b4c6b9b8e474e\"},\"headline\":\"MongoDB Log Analysis : A Comprehensive Guide\",\"datePublished\":\"2025-10-10T06:00:00+00:00\",\"dateModified\":\"2025-12-25T17:12:45+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.dbi-services.com\/blog\/mongodb-log-analysis-a-comprehensive-guide\/\"},\"wordCount\":952,\"commentCount\":0,\"keywords\":[\"analysis\",\"Automation\",\"jq\",\"json\",\"log\",\"metrics\",\"Mongo\",\"mongodb\",\"slow queries\",\"Troubleshooting\"],\"articleSection\":[\"Database Administration &amp; 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