{"id":54170,"date":"2025-11-25T07:40:56","date_gmt":"2025-11-25T07:40:56","guid":{"rendered":"https:\/\/www.devopsschool.com\/blog\/?p=54170"},"modified":"2026-02-21T08:29:07","modified_gmt":"2026-02-21T08:29:07","slug":"resource-monitor-resmon-exe-the-complete-one-stop-tutorial","status":"publish","type":"post","link":"https:\/\/www.devopsschool.com\/blog\/resource-monitor-resmon-exe-the-complete-one-stop-tutorial\/","title":{"rendered":"RESOURCE MONITOR (resmon.exe): The Complete One-Stop Tutorial"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2025\/11\/image-28.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"549\" src=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2025\/11\/image-28-1024x549.png\" alt=\"\" class=\"wp-image-54172\" srcset=\"https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2025\/11\/image-28-1024x549.png 1024w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2025\/11\/image-28-300x161.png 300w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2025\/11\/image-28-768x412.png 768w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2025\/11\/image-28-1536x824.png 1536w, https:\/\/www.devopsschool.com\/blog\/wp-content\/uploads\/2025\/11\/image-28.png 1909w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<p>This is the <strong>official-level guide<\/strong> that includes:<br>\u2714 What<br>\u2714 Why<br>\u2714 When<br>\u2714 Architecture<br>\u2714 Key Terminology<br>\u2714 How to Use (Step-by-Step)<br>\u2714 CPU \/ Disk \/ Network \/ Memory deep explanation<br>\u2714 Use Cases<br>\u2714 Troubleshooting<br>\u2714 Advantages &amp; Limitations<br>\u2714 Best Practices<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>RESOURCE MONITOR (resmon.exe): The Complete One-Stop Tutorial<\/strong><\/h1>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>1. Introduction<\/strong><\/h1>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What is Resource Monitor?<\/strong><\/h2>\n\n\n\n<p><strong>Resource Monitor (resmon.exe)<\/strong> is a built-in Windows tool that provides <strong>real-time<\/strong>, <strong>process-level<\/strong> monitoring of CPU, Memory, Disk, and Network activity.<\/p>\n\n\n\n<p>It shows exactly:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Which <strong>process<\/strong> is consuming CPU<\/li>\n\n\n\n<li>Which <strong>process &amp; file<\/strong> is causing disk I\/O<\/li>\n\n\n\n<li>Which <strong>process<\/strong> is sending\/receiving network traffic<\/li>\n\n\n\n<li>How much <strong>memory<\/strong> each process uses<\/li>\n\n\n\n<li>Which <strong>handles<\/strong> or <strong>modules<\/strong> a process has open<\/li>\n\n\n\n<li>Detailed activity of threads, file operations, TCP connections, and hard faults<\/li>\n<\/ul>\n\n\n\n<p>Resource Monitor is essentially <strong>Task Manager on steroids<\/strong> and is the most <strong>accurate real-time troubleshooting tool<\/strong> for Windows systems.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>2. Why Resource Monitor Exists (Purpose)<\/strong><\/h1>\n\n\n\n<p>Resource Monitor solves a major problem:<br><strong>You need to know EXACTLY which process is misbehaving \u2014 in real time.<\/strong><\/p>\n\n\n\n<p>Task Manager only shows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High-level CPU, memory, disk<\/li>\n\n\n\n<li>No per-file, per-port, or per-thread details<\/li>\n<\/ul>\n\n\n\n<p>PerfMon shows:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Historical counters<\/li>\n\n\n\n<li>Deep OS and application metrics<\/li>\n\n\n\n<li>Not real-time per-process insight<\/li>\n<\/ul>\n\n\n\n<p>Resource Monitor fills the gap:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 <strong>Real-time monitoring<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 <strong>Process-specific visibility<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 <strong>Per-file and per-port tracking<\/strong><\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 <strong>Instant bottleneck identification<\/strong><\/h3>\n\n\n\n<p>It\u2019s ideal for <strong>investigation<\/strong>, <strong>troubleshooting<\/strong>, and <strong>quick diagnosis<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>3. When to Use Resource Monitor<\/strong><\/h1>\n\n\n\n<p>Use Resource Monitor when:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 \u201cThe server is slow\u201d<\/h3>\n\n\n\n<p>Identify which process is eating CPU, disk, or memory.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 API or website is slow<\/h3>\n\n\n\n<p>Check if disk I\/O or network traffic is blocking the app.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Memory leak suspected<\/h3>\n\n\n\n<p>Check Working Set, Private KB, Hard Faults\/sec.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 High Disk IO \/ SSD thrashing<\/h3>\n\n\n\n<p>Find the exact file\/process responsible.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Malware or unknown process suspected<\/h3>\n\n\n\n<p>Check network connections &amp; TCP endpoints.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 SQL, IIS, .NET apps consuming too many resources<\/h3>\n\n\n\n<p>Find real-time usage and culprit modules\/files.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 During load testing<\/h3>\n\n\n\n<p>Use it alongside PerfMon to see real-time behavior.<\/p>\n\n\n\n<p>Resource Monitor = <strong>immediate root-cause analysis<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>4. Key Terminology<\/strong><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Process<\/strong><\/h3>\n\n\n\n<p>A running program (dotnet.exe, chrome.exe, sqlservr.exe)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Thread<\/strong><\/h3>\n\n\n\n<p>Execution unit inside a process. Responsible for CPU usage.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Handles<\/strong><\/h3>\n\n\n\n<p>File handles, registry entries, network sockets used by a process.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Working Set<\/strong><\/h3>\n\n\n\n<p>Actual RAM used by a process.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Private Bytes<\/strong><\/h3>\n\n\n\n<p>Memory allocated exclusively to that process.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Hard Faults\/sec<\/strong><\/h3>\n\n\n\n<p>When data must be retrieved from disk instead of RAM<br><strong>High = memory pressure or insufficient RAM.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Disk Queue Length<\/strong><\/h3>\n\n\n\n<p>How many disk operations are waiting.<br><strong>High = disk bottleneck.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>TCP Connections<\/strong><\/h3>\n\n\n\n<p>Real-time list of open network connections.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>5. Resource Monitor Architecture<\/strong><\/h1>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">Windows Kernel + Processes\n       \u2193\nResource Monitor Engine\n       \u2193\nReal-Time Data Providers\n       \u2193\nCPU \/ Disk \/ Network \/ Memory Tabs\n       \u2193\nGraphs + Process-Level Tables\n<\/code><\/span><\/pre>\n\n\n<h3 class=\"wp-block-heading\">Data comes from:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Windows Kernel<\/li>\n\n\n\n<li>NTFS<\/li>\n\n\n\n<li>TCP\/IP stack<\/li>\n\n\n\n<li>Memory Manager<\/li>\n\n\n\n<li>I\/O Manager<\/li>\n\n\n\n<li>Process Manager<\/li>\n<\/ul>\n\n\n\n<p>Resource Monitor acts as a <strong>viewer<\/strong>, not a metrics collector.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>6. How to Open Resource Monitor<\/strong><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Method 1 \u2013 Run command<\/strong><\/h3>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">Win + R \u2192 resmon\n<\/code><\/span><\/pre>\n\n\n<h3 class=\"wp-block-heading\"><strong>Method 2 \u2013 From Task Manager<\/strong><\/h3>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">Ctrl + Shift + Esc \u2192 Performance tab \u2192 Open Resource Monitor\n<\/code><\/span><\/pre>\n\n\n<h3 class=\"wp-block-heading\"><strong>Method 3 \u2013 Start Menu Search<\/strong><\/h3>\n\n\n\n<p>Search &#8220;Resource Monitor&#8221;<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>7. Understanding the Resource Monitor UI<\/strong><\/h1>\n\n\n\n<p>Resource Monitor has <strong>four main tabs<\/strong>, each with deep insight:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>CPU<\/strong><\/li>\n\n\n\n<li><strong>Memory<\/strong><\/li>\n\n\n\n<li><strong>Disk<\/strong><\/li>\n\n\n\n<li><strong>Network<\/strong><\/li>\n<\/ol>\n\n\n\n<p>Plus <strong>Overview tab<\/strong> that shows summaries of all four.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>8. Resource Monitor Sections Explained (Deep Dive)<\/strong><\/h1>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>8.1 CPU Tab<\/strong><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Shows:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Per-process CPU %<\/li>\n\n\n\n<li>Threads per process<\/li>\n\n\n\n<li>Services running inside svchost<\/li>\n\n\n\n<li>CPU usage timeline<\/li>\n\n\n\n<li>Threads activity<\/li>\n\n\n\n<li>Handles and modules<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Use Cases:<\/h3>\n\n\n\n<p>\u2714 Find CPU-hogging process<br>\u2714 Detect multithreading bottlenecks<br>\u2714 See which DLLs\/modules a process loaded<br>\u2714 Kill or suspend problematic processes<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>8.2 Memory Tab<\/strong><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Shows:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Private KB<\/strong><\/li>\n\n\n\n<li><strong>Working Set<\/strong><\/li>\n\n\n\n<li><strong>Shareable memory<\/strong><\/li>\n\n\n\n<li><strong>Commit size<\/strong><\/li>\n\n\n\n<li><strong>Hard Faults\/sec<\/strong><\/li>\n\n\n\n<li><strong>Total physical memory usage<\/strong><\/li>\n\n\n\n<li><strong>Kernel memory<\/strong><\/li>\n\n\n\n<li><strong>Standby list<\/strong><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Use Cases:<\/h3>\n\n\n\n<p>\u2714 Detect memory leaks<br>\u2714 Identify app causing paging<br>\u2714 Analyze hard faults (memory pressure)<br>\u2714 Compare Working Set vs Private Bytes<br>\u2714 See memory fragmentation<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>8.3 Disk Tab<\/strong><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Shows:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Real-time disk activity per process<\/strong><\/li>\n\n\n\n<li><strong>Files being read\/written<\/strong> (full path)<\/li>\n\n\n\n<li>IO Read Bytes\/sec<\/li>\n\n\n\n<li>IO Write Bytes\/sec<\/li>\n\n\n\n<li>Disk Queue Length<\/li>\n\n\n\n<li>Response time<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Use Cases:<\/h3>\n\n\n\n<p>\u2714 Identify disk hogging processes<br>\u2714 Troubleshoot slow API due to disk contention<br>\u2714 Detect heavy logging or temp-file writes<br>\u2714 Identify malware using disk<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>8.4 Network Tab<\/strong><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">Shows:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Per-process network usage<\/li>\n\n\n\n<li>Remote addresses \/ ports being accessed<\/li>\n\n\n\n<li>TCP connections<\/li>\n\n\n\n<li>Listening ports<\/li>\n\n\n\n<li>Network I\/O<\/li>\n\n\n\n<li>Packet loss or connection failures<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Use Cases:<\/h3>\n\n\n\n<p>\u2714 Troubleshoot slow API calls<br>\u2714 Detect suspicious outbound connections<br>\u2714 Check bandwidth consumption<br>\u2714 Identify port conflicts<br>\u2714 Check which app is using which port<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>9. How to Use Resource Monitor (Step-by-Step)<\/strong><\/h1>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>STEP 1 \u2014 Open Resource Monitor<\/strong><\/h1>\n\n\n\n<p><code>Win + R \u2192 resmon<\/code><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>STEP 2 \u2014 Start with Overview Tab<\/strong><\/h1>\n\n\n\n<p>This shows immediate CPU, Disk, Memory, and Network activity.<br>Look for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High CPU (red spike)<\/li>\n\n\n\n<li>High Disk I\/O<\/li>\n\n\n\n<li>High hard faults<\/li>\n\n\n\n<li>High network usage<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>STEP 3 \u2014 Investigate CPU<\/strong><\/h1>\n\n\n\n<p>Go to CPU tab:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sort by <strong>Average CPU<\/strong><\/li>\n\n\n\n<li>Right-click a process \u2192 Analyze Wait Chain<\/li>\n\n\n\n<li>Expand <strong>Services<\/strong> for svchost.exe<\/li>\n\n\n\n<li>Expand <strong>Threads<\/strong> to see hot threads<\/li>\n<\/ul>\n\n\n\n<p>Use when CPU is suddenly high.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>STEP 4 \u2014 Investigate Memory<\/strong><\/h1>\n\n\n\n<p>Go to Memory tab:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Check <strong>Hard Faults\/sec<\/strong><\/li>\n\n\n\n<li>Sort by <strong>Commit<\/strong> or <strong>Working Set<\/strong><\/li>\n\n\n\n<li>Identify memory hogs<\/li>\n\n\n\n<li>Detect leaks by watching Commit climb continuously<\/li>\n\n\n\n<li>Look for low <strong>Free<\/strong> memory and high <strong>Standby<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>STEP 5 \u2014 Investigate Disk<\/strong><\/h1>\n\n\n\n<p>Go to Disk tab:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Check <strong>Disk Queue Length<\/strong><\/li>\n\n\n\n<li>Sort by <strong>Total (B\/sec)<\/strong><\/li>\n\n\n\n<li>Expand a process to see the EXACT file being accessed<\/li>\n\n\n\n<li>Identify slow response time (ms)<\/li>\n<\/ul>\n\n\n\n<p>Great for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Slow websites<\/li>\n\n\n\n<li>Slow SQL Server<\/li>\n\n\n\n<li>High I\/O .NET apps<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>STEP 6 \u2014 Investigate Network<\/strong><\/h1>\n\n\n\n<p>Go to Network tab:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Sort by <strong>Total (B\/sec)<\/strong><\/li>\n\n\n\n<li>Check open TCP connections<\/li>\n\n\n\n<li>Check listening ports<\/li>\n\n\n\n<li>Identify outbound connections<\/li>\n<\/ul>\n\n\n\n<p>Great for:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Debugging API failures<\/li>\n\n\n\n<li>Detect malware<\/li>\n\n\n\n<li>See which process uses a specific port<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>10. Real-World Use Cases<\/strong><\/h1>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Use Case 1: High CPU<\/strong><\/h2>\n\n\n\n<p>Symptoms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Server slow<\/li>\n\n\n\n<li>CPU near 100%<\/li>\n<\/ul>\n\n\n\n<p>Solution:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open CPU tab<\/li>\n\n\n\n<li>Sort by <strong>Average CPU<\/strong><\/li>\n\n\n\n<li>Identify top offender<\/li>\n\n\n\n<li>Expand Threads \u2192 find responsible module<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Use Case 2: Memory Leak<\/strong><\/h2>\n\n\n\n<p>Symptoms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>RAM gradually fills<\/li>\n\n\n\n<li>Slow response<\/li>\n<\/ul>\n\n\n\n<p>Solution:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Open Memory<\/li>\n\n\n\n<li>Watch Private KB and Working Set<\/li>\n\n\n\n<li>Check if Commit grows nonstop<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Use Case 3: Slow Disk \/ SSD Thrashing<\/strong><\/h2>\n\n\n\n<p>Symptoms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High disk usage<\/li>\n\n\n\n<li>Website\/API slows down<\/li>\n<\/ul>\n\n\n\n<p>Solution:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Go to Disk<\/li>\n\n\n\n<li>View <strong>Disk Queue Length<\/strong><\/li>\n\n\n\n<li>See which file is causing reads\/writes<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Use Case 4: API Network Slowness<\/strong><\/h2>\n\n\n\n<p>Symptoms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Slow API calls<\/li>\n\n\n\n<li>High latency<\/li>\n<\/ul>\n\n\n\n<p>Solution:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Check Network tab<\/li>\n\n\n\n<li>Look at connections to backend servers<\/li>\n\n\n\n<li>Check packet loss or high outbound connections<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Use Case 5: Identify Malware or Suspicious Process<\/strong><\/h2>\n\n\n\n<p>Symptoms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Unknown traffic<\/li>\n\n\n\n<li>Unusual CPU I\/O<\/li>\n<\/ul>\n\n\n\n<p>Solution:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Check Network<\/li>\n\n\n\n<li>Detect unknown IPs<\/li>\n\n\n\n<li>Kill\/inspect malicious process<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Use Case 6: IIS\/Self-Hosted .NET App Slow<\/strong><\/h2>\n\n\n\n<p>Symptoms:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>High latency<\/li>\n\n\n\n<li>Slow response<\/li>\n<\/ul>\n\n\n\n<p>Solution:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>CPU \u2192 thread issues<\/li>\n\n\n\n<li>Memory \u2192 GC pressure<\/li>\n\n\n\n<li>Disk \u2192 log writing or DB I\/O<\/li>\n\n\n\n<li>Network \u2192 backend API slowness<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>11. Advantages of Resource Monitor<\/strong><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Real-time and high-accuracy<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Lightweight and built-in<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Shows per-process metrics (unique)<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Shows per-file and per-port activity<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Great for immediate troubleshooting<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Can pause, filter, and drill down<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Zero installation required<\/h3>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>12. Limitations<\/strong><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">\u274c Not built for long-term monitoring<\/h3>\n\n\n\n<p>(PerfMon\/DCS is better)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u274c No historical\/log export<\/h3>\n\n\n\n<p>(Use PerfMon or ETW)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u274c No advanced analytics<\/h3>\n\n\n\n<p>(Use dotnet-trace, PerfView, Grafana, New Relic)<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u274c Not ideal for cloud distributed systems<\/h3>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>13. Best Practices<\/strong><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Use ResMon + PerfMon together<\/h3>\n\n\n\n<p>Real-time + deep counters = complete picture.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Always sort CPU\/Memory\/Disk columns<\/h3>\n\n\n\n<p>Easiest way to find culprits.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Watch Hard Faults\/sec<\/h3>\n\n\n\n<p>High = memory pressure or low RAM.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Expand processes to see files &amp; connections<\/h3>\n\n\n\n<p>Gives 100% visibility.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Use \u201cAnalyze Wait Chain\u201d for deadlocks<\/h3>\n\n\n\n<p>Unique and extremely powerful.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Use Filter by Process<\/h3>\n\n\n\n<p>Instantly isolate everything a process touches.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\"><strong>14. Summary<\/strong><\/h1>\n\n\n\n<p>Resource Monitor is <strong>one of the most powerful real-time diagnostic tools<\/strong> in Windows.<\/p>\n\n\n\n<p>It provides:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Per-process CPU<\/li>\n\n\n\n<li>Per-process Disk + File I\/O<\/li>\n\n\n\n<li>Per-process Memory<\/li>\n\n\n\n<li>Per-process Network + TCP ports<\/li>\n\n\n\n<li>Hard faults, queue lengths, response time<\/li>\n<\/ul>\n\n\n\n<p>No Windows performance troubleshooting is complete without <strong>Resource Monitor + PerfMon working together<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\">\ud83c\udf81 <strong>Optional Add-ons (Say YES and I will generate)<\/strong><\/h1>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 A 10-Slide Resource Monitor Training Deck<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 PerfMon vs ResMon Comparison Slides<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 A one-page ResMon cheat sheet PDF<\/h3>\n\n\n\n<h3 class=\"wp-block-heading\">\u2714 Infographic diagrams for CPU\/Disk\/Memory\/Network<\/h3>\n\n\n\n<p>Just tell me <strong>\u201cCreate Slides\u201d<\/strong>, <strong>\u201cGive me cheat sheet\u201d<\/strong>, or <strong>\u201cCreate diagrams\u201d<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This is the official-level guide that includes:\u2714 What\u2714 Why\u2714 When\u2714 Architecture\u2714 Key Terminology\u2714 How to Use (Step-by-Step)\u2714 CPU \/ Disk \/ Network \/ Memory deep explanation\u2714 Use Cases\u2714 Troubleshooting\u2714 Advantages&#8230; <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[11138],"tags":[],"class_list":["post-54170","post","type-post","status-publish","format-standard","hentry","category-best-tools"],"_links":{"self":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/54170","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/comments?post=54170"}],"version-history":[{"count":4,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/54170\/revisions"}],"predecessor-version":[{"id":59884,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/posts\/54170\/revisions\/59884"}],"wp:attachment":[{"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/media?parent=54170"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/categories?post=54170"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.devopsschool.com\/blog\/wp-json\/wp\/v2\/tags?post=54170"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}