{"id":33340,"date":"2026-09-21T10:00:00","date_gmt":"2026-09-21T02:00:00","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=33340"},"modified":"2026-09-22T11:29:40","modified_gmt":"2026-09-22T03:29:40","slug":"journald-log-bloat-persistent-config","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/tutorials\/journald-log-bloat-persistent-config\/","title":{"rendered":"\u4e91\u670d\u52a1\u5668 journald \u65e5\u5fd7\u81a8\u80c0\u6cbb\u7406\uff1a\u6301\u4e45\u5316\u914d\u7f6e\u4e0e\u5bb9\u91cf\u9650\u989d"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/09\/journald-log-bloat-cover.webp\" alt=\"\u4e91\u670d\u52a1\u5668 journald \u65e5\u5fd7\u81a8\u80c0\u6cbb\u7406\u5c01\u9762\u56fe\" loading=\"lazy\" \/><\/p>\n<p>\u4e91\u670d\u52a1\u5668\uff08\u4e00\u79cd\u901a\u8fc7\u865a\u62df\u5316\u6280\u672f\u6309\u9700\u5206\u914d CPU\u3001\u5185\u5b58\u4e0e\u5b58\u50a8\u8d44\u6e90\u7684\u8054\u7f51\u8ba1\u7b97\u670d\u52a1\uff09\u7528\u4e45\u4e4b\u540e\uff0c\u5f88\u591a\u7ad9\u957f\u90fd\u9047\u5230\u8fc7\u540c\u4e00\u4ef6\u602a\u4e8b\uff1a\u660e\u660e\u6ca1\u6709\u4e0a\u4f20\u5927\u6587\u4ef6\uff0c\u78c1\u76d8\u7a7a\u95f4\u5374\u4e00\u5929\u5929\u51cf\u5c11\u3002\u6392\u67e5\u5230\u6700\u540e\uff0c&#8221;\u5143\u51f6&#8221;\u7ecf\u5e38\u843d\u5728 <code>\/var\/log\/journal<\/code> \u76ee\u5f55\u4e0a\u2014\u2014systemd-journald\uff08systemd \u5957\u4ef6\u4e2d\u7684\u7cfb\u7edf\u65e5\u5fd7\u670d\u52a1\uff09\u79ef\u7d2f\u7684\u4e8c\u8fdb\u5236\u65e5\u5fd7\uff0c\u6084\u6084\u5403\u6389\u4e86\u51e0\u4e2a GB \u751a\u81f3\u51e0\u5341 GB \u7684\u7a7a\u95f4\u3002\u672c\u6587\u5c06\u6559\u4f60\u5982\u4f55\u5224\u65ad journald \u65e5\u5fd7\u662f\u5426\u81a8\u80c0\u3001\u5982\u4f55\u901a\u8fc7\u6301\u4e45\u5316\u914d\u7f6e\u4e0e\u5bb9\u91cf\u9650\u989d\u4ece\u6839\u6e90\u4e0a\u6cbb\u7406\uff0c\u5e76\u7ed9\u51fa\u65e5\u5e38\u76d1\u63a7\u4e0e\u6e05\u7406\u7684\u5b8c\u6574\u547d\u4ee4\uff0c\u5e2e\u52a9\u4f60\u628a\u8fd9\u5757\u78c1\u76d8\u5f00\u9500\u7262\u7262\u63a7\u5236\u5728\u9884\u7b97\u4e4b\u5185\u3002<\/p>\n<h2>\u4e00\u3001\u5148\u641e\u6e05\u695a\uff1ajournald \u65e5\u5fd7\u4e3a\u4ec0\u4e48\u4f1a\u81a8\u80c0<\/h2>\n<p>journald \u91c7\u7528\u4e8c\u8fdb\u5236\u683c\u5f0f\u96c6\u4e2d\u8bb0\u5f55\u7cfb\u7edf\u65e5\u5fd7\uff0c\u6309\u8bbe\u8ba1\u5b83\u4f1a\u914d\u5408\u8f6e\u8f6c\uff08\u65e5\u5fd7\u6309\u5927\u5c0f\u6216\u65f6\u95f4\u81ea\u52a8\u5206\u5272\u3001\u5220\u9664\u65e7\u6587\u4ef6\u7684\u673a\u5236\uff09\u81ea\u6211\u7ea6\u675f\u3002\u4f46\u4e91\u670d\u52a1\u5668\u4e0a\u6709\u4e09\u7c7b\u5e38\u89c1\u60c5\u51b5\u4f1a\u8ba9\u7ea6\u675f\u5931\u6548\u3002<\/p>\n<p>\u7b2c\u4e00\u7c7b\u662f\u9ed8\u8ba4\u914d\u7f6e\u504f\u5bbd\u677e\u3002\u5728\u4e0d\u5c11\u53d1\u884c\u7248\u4e0a\uff0cjournald \u7684\u5b58\u50a8\u4e0a\u9650\u9ed8\u8ba4\u53d6\u78c1\u76d8\u7a7a\u95f4\u7684 10%\uff0c\u4e00\u53f0 200 GB \u6570\u636e\u76d8\u7684\u673a\u5668\uff0c\u7406\u8bba\u4e0a\u65e5\u5fd7\u53ef\u4ee5\u81a8\u80c0\u5230 20 GB\uff1b\u5982\u679c <code>\/var\/log\/journal<\/code> \u843d\u5728\u4e00\u5757 500 GB \u7684\u6570\u636e\u76d8\u4e0a\uff0c\u9ed8\u8ba4\u4e0a\u9650\u5c31\u662f 50 GB\u3002<\/p>\n<p>\u7b2c\u4e8c\u7c7b\u662f\u65e5\u5fd7\u4ea7\u751f\u901f\u7387\u5f02\u5e38\u3002\u67d0\u4e2a\u670d\u52a1\u6bcf\u79d2\u629b\u51fa\u4e0a\u5343\u884c\u9519\u8bef\u3001\u5185\u6838\u53cd\u590d\u5237\u5c4f\u3001\u8c03\u8bd5\u65e5\u5fd7\u5fd8\u4e86\u5173\u95ed\uff0c\u8fd9\u4e9b\u90fd\u4f1a\u8ba9\u65e5\u5fd7\u589e\u901f\u8fdc\u8d85\u6b63\u5e38\u6c34\u5e73\u3002\u6b64\u65f6\u5373\u4fbf\u914d\u989d\u6ca1\u53d8\uff0c\u65e5\u5fd7\u4e5f\u4f1a\u66f4\u5feb\u89e6\u9876\u3002<\/p>\n<p>\u7b2c\u4e09\u7c7b\u662f\u65e5\u5fd7\u76ee\u5f55\u843d\u5728\u4e0d\u53d7\u63a7\u7684\u6302\u8f7d\u70b9\u3002\u4f8b\u5982\u628a <code>\/var\/log<\/code> \u8f6f\u94fe\u6216\u6302\u8f7d\u5230\u4e86\u4e00\u5757\u5f88\u5927\u7684\u6570\u636e\u76d8\uff0cjournald \u6309\u8be5\u76d8\u603b\u5bb9\u91cf\u8ba1\u7b97 10% \u4e0a\u9650\uff0c\u65e5\u5fd7\u7684&#8221;\u5929\u82b1\u677f&#8221;\u968f\u4e4b\u88ab\u62ac\u9ad8\u3002<\/p>\n<p>\u5224\u65ad\u662f\u5426\u81a8\u80c0\uff0c\u53ea\u9700\u8981\u4e24\u6761\u547d\u4ee4\uff1a<code>journalctl --disk-usage<\/code> \u67e5\u770b\u5f53\u524d\u65e5\u5fd7\u5f52\u6863\u7684\u603b\u5360\u7528\uff1b<code>du -sh \/var\/log\/journal<\/code> \u67e5\u770b\u76ee\u5f55\u5b9e\u9645\u4f53\u79ef\u3002\u5982\u679c\u524d\u8005\u5df2\u7ecf\u4ee5 GB \u4e3a\u5355\u4f4d\uff0c\u4e14\u78c1\u76d8\u4f7f\u7528\u7387\u540c\u6b65\u6500\u5347\uff0c\u5c31\u53ef\u4ee5\u786e\u8ba4\u65e5\u5fd7\u81a8\u80c0\u662f\u7a7a\u95f4\u538b\u529b\u7684\u6765\u6e90\u4e4b\u4e00\u3002<\/p>\n<p>\u5728\u52a8\u624b\u6cbb\u7406\u524d\uff0c\u5efa\u8bae\u5148\u786e\u8ba4 <code>\/var\/log\/journal<\/code> \u4e0e\u7cfb\u7edf\u76d8\u7684\u6302\u8f7d\u5173\u7cfb\uff1a<code>df -h \/var\/log\/journal<\/code>\u3002\u5982\u679c\u5b83\u786e\u5b9e\u843d\u5728\u4e00\u5757\u8d85\u5927\u6570\u636e\u76d8\u4e0a\uff0c\u540e\u9762\u8bb2\u5230\u7684\u5bb9\u91cf\u9650\u989d\u914d\u7f6e\u5c31\u5c24\u4e3a\u5fc5\u8981\u3002<\/p>\n<h2>\u4e8c\u3001\u6301\u4e45\u5316\u914d\u7f6e\uff1a\u8ba9\u65e5\u5fd7\u884c\u4e3a\u53ef\u9884\u671f<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/09\/journald-storage-persistent-config.webp\" alt=\"journald \u6301\u4e45\u5316\u914d\u7f6e\u793a\u610f\u56fe\" loading=\"lazy\" \/><\/p>\n<p>journald \u7684\u5b58\u50a8\u884c\u4e3a\u7531 <code>\/etc\/systemd\/journald.conf<\/code> \u4e2d\u7684 <code>Storage<\/code> \u53c2\u6570\u51b3\u5b9a\uff0c\u5b83\u6709\u4e09\u4e2a\u53ef\u9009\u503c\uff0c\u884c\u4e3a\u5dee\u5f02\u5f88\u5927\uff1a<\/p>\n<ul>\n<li><code>auto<\/code>\uff1a\u9ed8\u8ba4\u503c\u3002<code>\/var\/log\/journal<\/code> \u76ee\u5f55\u5b58\u5728\u65f6\u5199\u6301\u4e45\u5316\u65e5\u5fd7\uff0c\u76ee\u5f55\u4e0d\u5b58\u5728\u5219\u9000\u56de\u6613\u5931\u6027\u7684\u5185\u5b58\u65e5\u5fd7<\/li>\n<li><code>persistent<\/code>\uff1a\u65e0\u6761\u4ef6\u628a\u65e5\u5fd7\u5199\u5230\u78c1\u76d8\uff0c\u76ee\u5f55\u4e0d\u5b58\u5728\u65f6\u81ea\u52a8\u521b\u5efa\uff1b\u91cd\u542f\u540e\u65e5\u5fd7\u4fdd\u7559<\/li>\n<li><code>volatile<\/code>\uff1a\u65e5\u5fd7\u53ea\u5199\u5728\u5185\u5b58\u4e2d\u7684 <code>\/run\/log\/journal<\/code>\uff0c\u91cd\u542f\u5373\u6d88\u5931\uff0c\u4e0d\u5360\u78c1\u76d8<\/li>\n<\/ul>\n<p>\u8fd9\u91cc\u6709\u4e00\u4e2a\u5f88\u5bb9\u6613\u88ab\u5ffd\u89c6\u7684\u5751\uff1a\u5982\u679c\u673a\u5668\u5904\u4e8e <code>auto<\/code> \u4e14 <code>\/var\/log\/journal<\/code> \u76ee\u5f55\u7f3a\u5931\uff0c\u65e5\u5fd7\u4f1a\u5168\u90e8\u5199\u8fdb\u5185\u5b58\uff0c\u8868\u73b0\u4e3a&#8221;\u78c1\u76d8\u5f88\u5e72\u51c0\u3001\u91cd\u542f\u65e5\u5fd7\u5168\u4e22&#8221;\u3002\u8fd9\u5728\u6392\u67e5\u6545\u969c\u65f6\u975e\u5e38\u81f4\u547d\u2014\u2014\u7b49\u4f60\u60f3\u8d77\u67e5\u65e5\u5fd7\uff0c\u673a\u5668\u53ef\u80fd\u5df2\u7ecf\u91cd\u542f\u8fc7\u4e86\u3002\u56e0\u6b64\u5bf9\u4e8e\u751f\u4ea7\u73af\u5883\u7684\u4e91\u670d\u52a1\u5668\uff0c\u6211\u4eec\u5efa\u8bae\u7684\u505a\u6cd5\u662f\u663e\u5f0f\u58f0\u660e <code>persistent<\/code>\uff0c\u628a\u65e5\u5fd7\u884c\u4e3a\u56fa\u5b9a\u4e0b\u6765\uff1a<\/p>\n<pre><code>sudo mkdir -p \/etc\/systemd\/journald.conf.d\nsudo tee \/etc\/systemd\/journald.conf.d\/99-size-limit.conf &gt; \/dev\/null &lt;&lt;'EOF'\n[Journal]\nStorage=persistent\nEOF\nsudo systemctl restart systemd-journald\n<\/code><\/pre>\n<p>\u4f7f\u7528 drop-in \u76ee\u5f55\uff08<code>journald.conf.d<\/code> \u4e0b\u65b0\u589e\u8986\u76d6\u7247\u6bb5\uff0c\u800c\u975e\u76f4\u63a5\u6539\u4e3b\u914d\u7f6e\u6587\u4ef6\uff09\u7684\u597d\u5904\u662f\u5347\u7ea7\u7cfb\u7edf\u5305\u65f6\u4e0d\u4f1a\u8986\u76d6\u4f60\u7684\u4fee\u6539\uff0c\u4e5f\u8ba9\u540e\u7eed\u5ba1\u8ba1\u4e00\u76ee\u4e86\u7136\u3002<\/p>\n<p>\u6301\u4e45\u5316\u4e4b\u540e\uff0c\u65e5\u5fd7\u4f1a\u6309\u5f52\u6863\u6587\u4ef6\u7684\u5f62\u5f0f\u5b58\u653e\u5728 <code>\/var\/log\/journal\/&lt;machine-id&gt;\/<\/code> \u4e0b\uff0c\u914d\u5408\u4e0b\u4e00\u8282\u7684\u5bb9\u91cf\u9650\u989d\uff0c\u5c31\u80fd\u5b9e\u73b0&#8221;\u65e2\u4fdd\u7559\u91cd\u542f\u524d\u7684\u5386\u53f2\u65e5\u5fd7\uff0c\u53c8\u4e0d\u4f1a\u65e0\u9650\u589e\u957f&#8221;\u7684\u76ee\u6807\u3002<\/p>\n<h2>\u4e09\u3001\u5bb9\u91cf\u9650\u989d\uff1a\u628a\u65e5\u5fd7\u603b\u91cf\u9501\u8fdb\u7b3c\u5b50<\/h2>\n<p>\u6301\u4e45\u5316\u89e3\u51b3\u4e86&#8221;\u65e5\u5fd7\u53bb\u54ea\u513f&#8221;\u7684\u95ee\u9898\uff0c\u5bb9\u91cf\u9650\u989d\u89e3\u51b3&#8221;\u65e5\u5fd7\u5360\u591a\u5927&#8221;\u7684\u95ee\u9898\u3002<code>SystemMaxUse<\/code> \u662f\u8fd9\u91cc\u7684\u6838\u5fc3\u53c2\u6570\uff0c\u5b83\u5b9a\u4e49\u65e5\u5fd7\u5f52\u6863\u53ef\u5360\u7528\u7684\u78c1\u76d8\u4e0a\u9650\uff0c\u8d85\u8fc7\u540e journald \u81ea\u52a8\u5220\u9664\u6700\u65e7\u7684\u5f52\u6863\u3002\u4e0e\u4e4b\u914d\u5957\u7684\u8fd8\u6709\u4e09\u4e2a\u53c2\u6570\uff0c\u5efa\u8bae\u4e00\u8d77\u7406\u89e3\uff1a<\/p>\n<ul>\n<li><code>SystemKeepFree<\/code>\uff1a\u65e5\u5fd7\u5199\u5165\u65f6\u81f3\u5c11\u4e3a\u78c1\u76d8\u4fdd\u7559\u7684\u7a7a\u95f2\u7a7a\u95f4\uff0c\u4f8b\u5982 <code>SystemKeepFree=2G<\/code> \u8868\u793a\u65e5\u5fd7\u6700\u591a\u589e\u957f\u5230&#8221;\u603b\u7a7a\u95f4\u51cf 2 GB&#8221;\u4e3a\u6b62<\/li>\n<li><code>SystemMaxFileSize<\/code>\uff1a\u5355\u4e2a\u5f52\u6863\u6587\u4ef6\u7684\u5927\u5c0f\u4e0a\u9650\uff0c\u8d85\u8fc7\u540e\u5207\u5206\u65b0\u6587\u4ef6\uff0c\u53d6\u503c\u9700\u5c0f\u4e8e\u7b49\u4e8e <code>SystemMaxUse<\/code><\/li>\n<li><code>MaxRetentionSec<\/code>\uff1a\u65e5\u5fd7\u6700\u957f\u4fdd\u7559\u65f6\u957f\uff0c\u4f8b\u5982 <code>14day<\/code> \u8868\u793a\u8d85\u8fc7\u4e24\u5468\u7684\u5f52\u6863\u65e0\u6761\u4ef6\u5220\u9664<\/li>\n<\/ul>\n<p>\u4e00\u4e2a\u517c\u987e\u6392\u969c\u9700\u6c42\u4e0e\u7a7a\u95f4\u5b89\u5168\u7684\u63a8\u8350\u914d\u7f6e\u5982\u4e0b\uff1a<\/p>\n<pre><code>sudo tee \/etc\/systemd\/journald.conf.d\/99-size-limit.conf &gt; \/dev\/null &lt;&lt;'EOF'\n[Journal]\nStorage=persistent\nSystemMaxUse=500M\nSystemKeepFree=2G\nSystemMaxFileSize=50M\nMaxRetentionSec=14day\nEOF\nsudo systemctl restart systemd-journald\n<\/code><\/pre>\n<p>\u53c2\u6570\u53d6\u503c\u6ca1\u6709\u4e07\u80fd\u7b54\u6848\uff0c\u53ef\u4ee5\u6309\u673a\u5668\u89d2\u8272\u4f30\u7b97\uff1aWeb \u670d\u52a1\u5668\u65e5\u5fd7\u589e\u901f\u901a\u5e38\u5728\u6bcf\u5929\u51e0\u5341 MB \u4ee5\u5185\uff0c500 MB \u4e0a\u9650\u52a0\u4e24\u5468\u4fdd\u7559\u5df2\u7ecf\u8db3\u591f\u56de\u6eaf\u7edd\u5927\u591a\u6570\u6545\u969c\uff1b\u9ad8\u9891\u4ea4\u6613\u6216\u5ba1\u8ba1\u7c7b\u7cfb\u7edf\u5219\u9700\u8981\u6309\u5b9e\u9645\u65e5\u5fd7\u901f\u7387\u53cd\u63a8\u4e0a\u9650\u3002\u4fee\u6539\u540e\u7528 <code>journalctl --disk-usage<\/code> \u590d\u67e5\uff0c\u786e\u8ba4\u5f52\u6863\u603b\u91cf\u5df2\u88ab\u538b\u5230\u65b0\u4e0a\u9650\u4e4b\u5185\u3002<\/p>\n<p>\u82e5\u60f3\u7acb\u5373\u91ca\u653e\u7a7a\u95f4\u800c\u4e0d\u7b49\u8f6e\u8f6c\u81ea\u7136\u751f\u6548\uff0c\u53ef\u4ee5\u624b\u52a8\u6267\u884c\u771f\u7a7a\u6e05\u7406\uff1a<code>sudo journalctl --vacuum-size=200M<\/code> \u628a\u65e5\u5fd7\u538b\u5230 200 MB\uff0c\u6216 <code>sudo journalctl --vacuum-time=7d<\/code> \u53ea\u4fdd\u7559\u6700\u8fd1 7 \u5929\u3002\u8fd9\u4e24\u6761\u547d\u4ee4\u5373\u65f6\u751f\u6548\uff0c\u9002\u5408\u78c1\u76d8\u5df2\u7ecf\u544a\u6025\u7684\u5e94\u6025\u5904\u7f6e\u3002<\/p>\n<h2>\u56db\u3001\u5b9e\u6218\u6848\u4f8b\uff1a\u4e00\u6b21 12 GB \u65e5\u5fd7\u7684\u6cbb\u7406\u8fc7\u7a0b<\/h2>\n<p>\u4e3a\u4e86\u8ba9\u4e0a\u8ff0\u914d\u7f6e\u843d\u5730\uff0c\u6211\u4eec\u590d\u76d8\u4e00\u4e2a\u771f\u5b9e\u6848\u4f8b\uff1a\u67d0\u53f0 4 GB \u5185\u5b58\u300140 GB \u7cfb\u7edf\u76d8\u7684 <a href=\"https:\/\/cn.hostease.com\/vps\/\">VPS<\/a>\uff08<a href=\"https:\/\/cn.hostease.com\/vps\/\">\u865a\u62df\u4e13\u7528\u670d\u52a1\u5668<\/a>\uff0c\u5728\u5355\u53f0\u7269\u7406\u673a\u4e0a\u865a\u62df\u51fa\u7684\u72ec\u4eab\u8d44\u6e90\u73af\u5883\uff09\uff0c\u56db\u4e2a\u6b65\u9aa4\u603b\u5171\u7528\u65f6\u4e0d\u5230\u5341\u5206\u949f\u3002<\/p>\n<p>\u7b2c\u4e00\u6b65\uff0c\u786e\u8ba4\u73b0\u72b6\uff1a<code>journalctl --disk-usage<\/code> \u663e\u793a <code>Archived and active journals take up 12.1G<\/code>\uff0c<code>df -h \/<\/code> \u663e\u793a\u7cfb\u7edf\u76d8\u4f7f\u7528\u7387 91%\u2014\u2014\u81a8\u80c0\u7a0b\u5ea6\u8db3\u4ee5\u89e3\u91ca\u78c1\u76d8\u538b\u529b\u3002<\/p>\n<p>\u7b2c\u4e8c\u6b65\uff0c\u5b9a\u4f4d\u589e\u901f\u6765\u6e90\uff1a<code>journalctl -p 3 -S -1d --no-pager | awk '{print $5}' | sort | uniq -c | sort -rn | head -5<\/code> \u7edf\u8ba1\u6700\u8fd1\u4e00\u5929\u7684\u9519\u8bef\u7ea7\u65e5\u5fd7\u6765\u6e90\uff0c\u53d1\u73b0\u662f\u67d0\u4e2a PHP \u8fdb\u7a0b\u6bcf\u79d2\u8f93\u51fa\u6570\u5341\u884c\u5931\u8d25\u91cd\u8bd5\u4fe1\u606f\uff0c\u65e5\u79ef\u6708\u7d2f\u6491\u5927\u4e86\u65e5\u5fd7\u3002\u4fee\u590d\u8be5\u670d\u52a1\u540e\uff0c\u65e5\u5fd7\u589e\u901f\u56de\u843d\u5230\u6bcf\u5929\u7ea6 30 MB\u3002<\/p>\n<p>\u7b2c\u4e09\u6b65\uff0c\u5199\u5165\u4e0a\u4e00\u8282\u7684 <code>99-size-limit.conf<\/code>\uff08<code>SystemMaxUse=500M<\/code>\u3001<code>MaxRetentionSec=14day<\/code>\uff09\u5e76\u91cd\u542f journald\u3002<\/p>\n<p>\u7b2c\u56db\u6b65\uff0c\u5e94\u6025\u6e05\u7406\u4e0e\u9a8c\u8bc1\uff1a\u5148\u6267\u884c <code>sudo journalctl --vacuum-size=500M<\/code> \u7acb\u5373\u56de\u6536\u7ea6 11.6 GB \u7a7a\u95f4\uff0c\u7cfb\u7edf\u76d8\u4f7f\u7528\u7387\u964d\u5230 62%\uff1b\u4e00\u5468\u540e\u590d\u67e5 <code>journalctl --disk-usage<\/code> \u7a33\u5b9a\u5728 500 MB \u9644\u8fd1\uff0c\u8bf4\u660e\u9650\u989d\u5df2\u6301\u7eed\u751f\u6548\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/09\/journald-vacuum-disk-cleanup.webp\" alt=\"journalctl vacuum \u6e05\u7406\u793a\u610f\u56fe\" loading=\"lazy\" \/><\/p>\n<p>\u8fd9\u4e2a\u6848\u4f8b\u7684\u5173\u952e\u5728\u4e8e&#8221;\u5148\u5835\u589e\u901f\u3001\u518d\u8bbe\u9650\u989d\u3001\u6700\u540e\u6e05\u7406&#8221;\u7684\u987a\u5e8f\uff1a\u5982\u679c\u53ea\u505a\u6e05\u7406\u4e0d\u4fee\u670d\u52a1\uff0c\u65e5\u5fd7\u51e0\u5929\u5185\u5c31\u4f1a\u5377\u571f\u91cd\u6765\uff1b\u5982\u679c\u53ea\u8bbe\u9650\u989d\u4e0d\u6e05\u7406\uff0c\u7a7a\u95f4\u8981\u7b49\u8f6e\u8f6c\u6162\u6162\u91ca\u653e\uff0c\u6551\u4e0d\u4e86\u6025\u3002<\/p>\n<h2>\u4e94\u3001\u5e38\u89c1\u5751\u4e0e\u6ce8\u610f\u4e8b\u9879<\/h2>\n<p>\u914d\u7f6e\u8fc7\u7a0b\u4e2d\u6709\u51e0\u4e2a\u9ad8\u9891\u7ffb\u8f66\u70b9\uff0c\u503c\u5f97\u5355\u72ec\u5217\u51fa\u3002<\/p>\n<p>\u5751\u4e00\uff1a\u6539\u5b8c\u914d\u7f6e\u4e0d\u91cd\u542f\u670d\u52a1\u3002<code>journald.conf<\/code> \u7684\u4fee\u6539\u5fc5\u987b <code>sudo systemctl restart systemd-journald<\/code> \u624d\u751f\u6548\uff0c\u53ea\u4fdd\u5b58\u6587\u4ef6\u4e0d\u4f1a\u6709\u4efb\u4f55\u53d8\u5316\u3002\u6781\u5c11\u6570\u7cfb\u7edf\u4e0a\u91cd\u542f journald \u4f1a\u77ed\u6682\u5f71\u54cd\u4e2a\u522b\u670d\u52a1\u7684\u65e5\u5fd7\u8f93\u51fa\uff0c\u5efa\u8bae\u5728\u4f4e\u5cf0\u671f\u64cd\u4f5c\u3002<\/p>\n<p>\u5751\u4e8c\uff1a<code>SystemMaxUse<\/code> \u8bbe\u5f97\u6bd4\u5f53\u524d\u65e5\u5fd7\u5360\u7528\u8fd8\u5c0f\u5374\u6ca1\u751f\u6548\u3002journald \u7f29\u5bb9\u662f\u6e10\u8fdb\u5f0f\u7684\uff0c\u5fc5\u8981\u65f6\u624b\u52a8\u6267\u884c\u4e00\u6b21 <code>journalctl --vacuum-size=<\/code> \u5f3a\u5236\u5bf9\u9f50\u3002\u53e6\u5916\u68c0\u67e5\u5355\u4f4d\u4e66\u5199\uff1a<code>500M<\/code> \u4e0e <code>500G<\/code> \u4e00\u5b57\u4e4b\u5dee\uff0c\u540e\u679c\u5929\u58e4\u4e4b\u522b\u3002<\/p>\n<p>\u5751\u4e09\uff1a\u628a journald \u65e5\u5fd7\u4e0e <code>\/var\/log\/syslog<\/code>\u3001<code>\/var\/log\/messages<\/code> \u6df7\u4e3a\u4e00\u8c08\u3002\u540e\u8005\u591a\u7531 rsyslog \u4ece journald \u8f6c\u53d1\u800c\u6765\uff0c\u5c5e\u4e8e\u4f20\u7edf\u6587\u672c\u65e5\u5fd7\uff0c\u6709\u81ea\u5df1\u7684 logrotate \u8f6e\u8f6c\u4f53\u7cfb\uff1b\u4e24\u8005\u53ef\u80fd\u540c\u65f6\u5360\u7a7a\u95f4\uff0c\u6cbb\u7406\u65f6\u9700\u8981\u5206\u522b\u7528 <code>du -sh \/var\/log<\/code> \u5206\u89e3\u786e\u8ba4\uff0c\u522b\u6e05\u4e86\u4e00\u534a\u6f0f\u4e86\u4e00\u534a\u3002<\/p>\n<p>\u5751\u56db\uff1a\u9650\u989d\u8bbe\u5f97\u8fc7\u5c0f\u5bfc\u81f4\u6392\u969c\u4fe1\u606f\u4e22\u5931\u3002\u5982\u679c\u628a <code>SystemMaxUse<\/code> \u538b\u5230 50 MB \u4ee5\u4e0b\uff0c\u4e00\u6b21\u7a0d\u5fae\u590d\u6742\u7684\u6545\u969c\u6392\u67e5\u5c31\u53ef\u80fd\u8d85\u51fa\u4fdd\u7559\u7a97\u53e3\u3002\u9664\u975e\u78c1\u76d8\u6781\u5ea6\u7d27\u5f20\uff0c\u5efa\u8bae\u7ed9\u65e5\u5fd7\u7559\u51fa&#8221;\u4e24\u5468\u4fdd\u7559\u6216 500 MB&#8221;\u4e2d\u8f83\u5927\u7684\u90a3\u4e2a\u4f59\u91cf\u3002<\/p>\n<h2>\u516d\u3001\u603b\u7ed3\u4e0e\u540e\u7eed\u5efa\u8bae<\/h2>\n<p>\u6cbb\u7406 journald \u65e5\u5fd7\u81a8\u80c0\u7684\u6838\u5fc3\u52a8\u4f5c\u53ef\u4ee5\u5f52\u7eb3\u4e3a\u4e00\u53e5\u8bdd\uff1a\u6301\u4e45\u5316\u8ba9\u884c\u4e3a\u53ef\u9884\u671f\uff0c\u9650\u989d\u8ba9\u589e\u957f\u6709\u8fb9\u754c\uff0c\u76d1\u63a7\u8ba9\u95ee\u9898\u65e9\u53d1\u73b0\u3002\u5982\u679c\u4f60\u6b63\u5728\u4e3a\u4e91\u670d\u52a1\u5668\u7684\u78c1\u76d8\u589e\u957f\u70e6\u607c\uff0c\u5efa\u8bae\u6309\u672c\u6587\u987a\u5e8f\u6267\u884c\uff1a<code>journalctl --disk-usage<\/code> \u6478\u5e95\u3001<code>Storage=persistent<\/code> \u56fa\u5316\u884c\u4e3a\u3001<code>SystemMaxUse<\/code> \u52a0 <code>MaxRetentionSec<\/code> \u53cc\u4fdd\u9669\u3001\u5fc5\u8981\u65f6 vacuum \u5e94\u6025\uff0c\u6700\u540e\u628a <code>--disk-usage<\/code> \u7684\u8f93\u51fa\u7eb3\u5165\u5468\u671f\u6027\u5de1\u68c0\u3002<\/p>\n<p>\u5982\u679c\u4f60\u9700\u8981\u66f4\u7701\u5fc3\u7684\u7cfb\u7edf\u65e5\u5fd7\u4e0e\u78c1\u76d8\u7ba1\u7406\u4f53\u9a8c\uff0c\u4e5f\u53ef\u4ee5\u8003\u8651 Hostease \u7684\u4e91\u670d\u52a1\u5668\u65b9\u6848\u3002\u66f4\u591a\u8fd0\u7ef4\u5b9e\u8df5\uff0c\u63a8\u8350\u5ef6\u4f38\u9605\u8bfb\u6211\u4eec\u7684<a href=\"https:\/\/cn.hostease.com\/blog\/server\/\">\u670d\u52a1\u5668\u914d\u7f6e\u4e0e\u4f18\u5316\u4e13\u680f<\/a>\u548c<a href=\"https:\/\/cn.hostease.com\/blog\/guides\/ttfb-hosting-optimization\/\">WordPress \u7f51\u7ad9\u6027\u80fd\u4f18\u5316\u6307\u5357<\/a>\uff1b\u5982\u679c\u4f60\u5728\u6311\u9009\u6216\u5347\u7ea7\u4e3b\u673a\u65b9\u6848\uff0c<a href=\"https:\/\/cn.hostease.com\/vps\/\">VPS \u4e3b\u673a<\/a>\u4e0e<a href=\"https:\/\/cn.hostease.com\/web-hosting\/\">\u865a\u62df\u4e3b\u673a<\/a>\u9875\u9762\u63d0\u4f9b\u4e86\u89c4\u683c\u4e0e\u573a\u666f\u5bf9\u7167\uff0c\u65b9\u4fbf\u6309\u9700\u9009\u62e9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u8be6\u89e3\u4e91\u670d\u52a1\u5668 journald \u65e5\u5fd7\u81a8\u80c0\u7684\u6392\u67e5\u4e0e\u6cbb\u7406\uff1aStorage \u6301\u4e45\u5316\u5207\u6362\u3001SystemMaxUse \u5bb9\u91cf\u9650\u989d\u3001vacuum \u6e05\u7406\u4e0e\u8f6e\u8f6c\u76d1\u63a7\uff0c\u9644\u5b8c\u6574\u914d\u7f6e\u547d\u4ee4\u4e0e\u907f\u5751\u8981\u70b9\u3002<\/p>\n","protected":false},"author":2,"featured_media":33337,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4099],"tags":[5135,5133,4449,4787,5134],"class_list":["post-33340","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tutorials","tag-varlogjournal","tag-journald","tag-systemd","tag-4787","tag-5134"],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/09\/journald-log-bloat-cover.webp","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/33340","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/comments?post=33340"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/33340\/revisions"}],"predecessor-version":[{"id":33341,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/33340\/revisions\/33341"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media\/33337"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media?parent=33340"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/categories?post=33340"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/tags?post=33340"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}