WSL | ShareChiWai Noteshttps://sharechiwai.com/category/wsl/WSLHugoBlox Kit (https://hugoblox.com)en-usSun, 01 Feb 2026 00:00:00 +0800https://sharechiwai.com/media/icon_hu_17828a82f3c79d3a.pngWSLhttps://sharechiwai.com/category/wsl/High RAM usage on VMmemWSL when you have dockerhttps://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/Sun, 01 Feb 2026 00:00:00 +0800https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/<p>今日做做下野時發現部 Asus S13 32GB RAM 既 laptop 有 D lag，睇下 task manager 就發現 <code>VMmemWSL</code> 佔用咗大約 <strong>14GB</strong> 既 RAM。</p> <p>係 Windows 機遇到呢 D 問題通常都會 restart 部機睇下會唔會解決到&hellip;</p> <p> <figure > <div class="flex justify-center "> <div class="w-full" > <img alt="Feature" srcset="https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/feature_hu_5e520759acdc3efa.webp 320w, https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/feature_hu_a71fb441ddd2dfc7.webp 480w, https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/feature_hu_2c015b4ec551f476.webp 760w" sizes="(max-width: 480px) 100vw, (max-width: 768px) 90vw, (max-width: 1024px) 80vw, 760px" src="https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/feature_hu_5e520759acdc3efa.webp" width="760" height="422" loading="lazy" data-zoomable /></div> </div></figure> </p> <p>點知 restart 完之後一開 docker <code>VMmemWSL</code> 都用咗 <strong>4GB</strong> RAM，無乜點做野都無左 4GB。</p> <p> <figure > <div class="flex justify-center "> <div class="w-full" > <img alt="VMmemWSL high RAM usage" srcset="https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/vnmemwsl-high-ram-usage_hu_f9fe862c1ff43d96.webp 320w, https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/vnmemwsl-high-ram-usage_hu_7e95d0b7f7ef9ee9.webp 480w, https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/vnmemwsl-high-ram-usage_hu_30219140b1a624ba.webp 760w" sizes="(max-width: 480px) 100vw, (max-width: 768px) 90vw, (max-width: 1024px) 80vw, 760px" src="https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/vnmemwsl-high-ram-usage_hu_f9fe862c1ff43d96.webp" width="760" height="424" loading="lazy" data-zoomable /></div> </div></figure> </p> <p>問左 Gemini 佢話通常因為有 DB 既機係 Docker 會自己 allocate 大量 RAM。</p> <p>但係我又無真係用緊佢都用咁多 RAM&hellip;</p> <p>再做左 D 資料搜集，發現原來係 <strong>Docker Desktop + WSL2</strong> 既問題，佢會自己 allocate 大量 RAM 俾 WSL2 用。</p> <h2 id="解決方法">解決方法</h2> <p><code>Win+R</code> <code>&quot;%%USERPROFILE%%&quot;</code> 打開 User Folder，睇下有無一個 <code>.wslconfig</code> file。</p> <p>無就 create 一個 <code>.wslconfig</code> file，入面加以下內容：</p> <p> <figure > <div class="flex justify-center "> <div class="w-full" > <img alt="Windows User Profile folder" srcset="https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/win-run-userprofile_hu_a3211e7171139ab7.webp 320w, https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/win-run-userprofile_hu_249e168aed932f49.webp 480w, https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/win-run-userprofile_hu_deb282e306957ee4.webp 573w" sizes="(max-width: 480px) 100vw, (max-width: 768px) 90vw, (max-width: 1024px) 80vw, 760px" src="https://sharechiwai.com/post/2026/2026-02-01-docker-vmemwsl-high-ram/win-run-userprofile_hu_a3211e7171139ab7.webp" width="573" height="341" loading="lazy" data-zoomable /></div> </div></figure> </p> <div class="highlight"><pre tabindex="0" class="chroma"><code class="language-ini" data-lang="ini"><span class="line"><span class="cl"><span class="k">[wsl2]</span> </span></span><span class="line"><span class="cl"><span class="na">memory</span><span class="o">=</span><span class="s">4GB # Limits VM memory in WSL 2 to 4 GB</span> </span></span><span class="line"><span class="cl"><span class="na">processors</span><span class="o">=</span><span class="s">4 # Makes the WSL 2 VM use two virtual processors</span> </span></span><span class="line"><span class="cl"> </span></span><span class="line"><span class="cl"><span class="k">[experimental]</span> </span></span><span class="line"><span class="cl"><span class="na">autoMemoryReclaim</span><span class="o">=</span><span class="s">gradual # Enables gradual memory reclaiming, which allows WSL 2 to release unused memory back to the host system over time</span> </span></span></code></pre></div><p>咁就可以限制 WSL2 用最多 <strong>4GB</strong> RAM，同埋開啟 <strong>gradual memory reclaiming</strong> 功能，讓 WSL2 可以隨時釋放未使用的記憶體回主機系統。</p> <p>Save 完之後重啟部機，再開 docker 就會見到 <code>VMmemWSL</code> 只係用左大約 <strong>4GB</strong> RAM，唔會再有之前咁大既 RAM usage 啦。</p> <p> <figure > <div class="flex justify-center "> <div class="w-full" ><img src="vnmemwsl-memory-issue-fixed.png" alt="VMmemWSL memory issue fixed" loading="lazy" data-zoomable /></div> </div></figure> </p> <p>Hope you find it useful</p>