{"id":441860,"date":"2025-07-30T19:23:00","date_gmt":"2025-07-30T11:23:00","guid":{"rendered":"https:\/\/www.idc.net\/help\/?p=441860"},"modified":"2025-09-15T23:06:26","modified_gmt":"2025-09-15T15:06:26","slug":"%e6%b7%b1%e5%85%a5%e7%90%86%e8%a7%a3linux%e5%86%85%e5%ad%98%e7%ae%a1%e7%90%86%e4%b8%8e%e9%a1%b5%e9%9d%a2%e4%ba%a4%e6%8d%a2%e6%9c%ba%e5%88%b6","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/441860\/","title":{"rendered":"Linux \u5185\u5b58\u7ba1\u7406\u4e0e\u9875\u9762\u4ea4\u6362\uff1a\u4f18\u5316\u540e\u6d6a\u4e91 VPS \u6027\u80fd"},"content":{"rendered":"

\u5f15\u8a00<\/h2>\n

Linux \u7684\u5185\u5b58\u7ba1\u7406\u901a\u8fc7\u9875\u9762\u7f13\u5b58\u3001\u533f\u540d\u9875\u9762\u548c\u4ea4\u6362\u673a\u5236\u9ad8\u6548\u534f\u8c03\u5185\u5b58\u4e0e\u78c1\u76d8\u64cd\u4f5c\uff0c\u4f18\u5316\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u6027\u80fd\u3002\u9875\u9762\u4ea4\u6362\u673a\u5236\u5728\u5185\u5b58\u7d27\u5f20\u65f6\u91ca\u653e\u8d44\u6e90\uff0c\u4fdd\u969c\u7cfb\u7edf\u7a33\u5b9a\u6027\u3002\u672c\u6587\u4ee5\u4e00\u4e2a\u540e\u6d6a\u4e91 VPS \u6848\u4f8b\u4e3a\u5207\u5165\u70b9\uff0c\u6df1\u5165\u5256\u6790\u9875\u9762\u7c7b\u578b\u3001\u4ea4\u6362\u539f\u7406\u548c\u4f18\u5316\u7b56\u7565\uff0c\u5206\u4eab\u5b9e\u7528\u6280\u5de7\uff0c\u52a9\u529b\u5f00\u53d1\u8005\u4e0e\u7cfb\u7edf\u7ba1\u7406\u5458\u63d0\u5347\u8fd0\u7ef4\u6548\u7387\u3002<\/p>\n

\u771f\u5b9e\u573a\u666f\u6848\u4f8b\uff1a\u540e\u6d6a\u4e91 VPS \u4e0a\u4f18\u5316 Redis \u6027\u80fd<\/h2>\n

\u5047\u8bbe\u60a8\u4e3a\u4e00\u5bb6\u7535\u5546\u5e73\u53f0\u7ba1\u7406\u540e\u6d6a\u4e91\u9999\u6e2f VPS\uff08https:\/\/idc.net\/cloud-hk<\/a>\uff09\uff0c\u8fd0\u884c Redis \u7f13\u5b58\u670d\u52a1\u3002\u670d\u52a1\u5668\u91c7\u7528 HK-2H4G \u5957\u9910\uff1a2 \u6838\u9ad8\u6027\u80fd CPU\u30014G DDR4 \u5185\u5b58\u300150G SSD \u5b58\u50a8\u548c 2Mbps \u5e26\u5bbd\u3002\u9891\u7e41\u9875\u9762\u4ea4\u6362\u5bfc\u81f4 Redis \u54cd\u5e94\u5ef6\u8fdf\u589e\u52a0\uff0c\u60a8\u51b3\u5b9a\u4f18\u5316\u5185\u5b58\u4e0e Swap \u914d\u7f6e\u3002<\/p>\n

\u901a\u8fc7 SSH \u767b\u5f55\uff0c\u8c03\u6574 Swap \u53c2\u6570\u5e76\u76d1\u63a7\uff1a<\/p>\n

\r\n# \u67e5\u770b\u5185\u5b58\u4e0e Swap \u4f7f\u7528\r\nfree -h\r\n# \u8f93\u51fa\u793a\u4f8b\uff1atotal 4.0G, used 3.2G, buff\/cache 600M, swap used 400M<\/code><\/pre>\n
\u964d\u4f4e Swap \u503e\u5411<\/h1>\n
<\/code><\/pre>\n
echo 20 | sudo tee \/proc\/sys\/vm\/swappiness<\/p>\n
<\/code><\/pre>\n
\u6e05\u7406\u9875\u9762\u7f13\u5b58<\/h1>\n
<\/code><\/pre>\n
sudo sync; echo 3 | sudo tee \/proc\/sys\/vm\/drop_caches<\/p>\n
<\/code><\/pre>\n
\u9a8c\u8bc1 Redis \u6027\u80fd<\/h1>\n
<\/code><\/pre>\n
redis-cli ping<\/p>\n
<\/code><\/pre>\n
\u8f93\u51fa\u793a\u4f8b\uff1aPONG (\u5ef6\u8fdf\u4ece 50ms \u964d\u81f3 15ms)<\/h1>\n
\r\n<\/code><\/pre>\n
<\/code><\/p>\n
 <\/p>\n
\u4f18\u5316\u540e\uff0cSwap \u4f7f\u7528\u964d\u81f3 100MB\uff0cRedis \u54cd\u5e94\u5ef6\u8fdf\u51cf\u5c11 70%\u3002\u540e\u6d6a\u4e91\u7684 SSD \u5b58\u50a8\u52a0\u901f\u9875\u9762\u4ea4\u6362\uff0c2Mbps \u5e26\u5bbd\u652f\u6301\u9ad8\u5e76\u53d1\u8bbf\u95ee\u3002\u53c2\u8003 Redis \u6587\u6863\uff0c\u5408\u7406\u914d\u7f6e Swap \u63d0\u5347\u7f13\u5b58\u6027\u80fd\u3002<\/p>\n
\u6280\u672f\u539f\u7406\u5256\u6790<\/h2>\n
Linux \u5185\u5b58\u7ba1\u7406\u901a\u8fc7\u9875\u9762\u7c7b\u578b\u3001I\/O \u65b9\u5f0f\u548c\u4ea4\u6362\u673a\u5236\u4f18\u5316\u8d44\u6e90\u5206\u914d\uff0c\u9002\u914d\u9ad8\u5e76\u53d1\u573a\u666f\u3002<\/p>\n
\u9875\u9762\u7c7b\u578b<\/h3>\n
- **\u6587\u4ef6\u80cc\u666f\u9875\u9762**\uff1a\u4e0e\u78c1\u76d8\u6587\u4ef6\u5173\u8054\uff08\u5982\u4ee3\u7801\u6bb5\u3001mmap \u6587\u4ef6\uff09\uff0c\u5b58\u50a8\u5728\u9875\u9762\u7f13\u5b58\u4e2d\uff0c\u5185\u5b58\u4e0d\u8db3\u65f6\u5199\u56de\u6587\u4ef6\uff0c\u91ca\u653e\u7a7a\u95f4\u3002 - **\u533f\u540d\u9875\u9762**\uff1a\u65e0\u78c1\u76d8\u6587\u4ef6\uff08\u5982\u5806\u3001\u6808\uff09\uff0c\u5185\u5b58\u4e0d\u8db3\u65f6\u4ea4\u6362\u81f3 Swap \u5206\u533a\u6216\u6587\u4ef6\u3002<\/p>\n
\u9875\u9762\u7f13\u5b58\u5145\u5f53\u5185\u5b58\u4e0e\u78c1\u76d8\u7684\u7f13\u51b2\u533a\uff0c\u51cf\u5c11\u76f4\u63a5 I\/O\u3002<\/p>\n
\u6587\u4ef6 I\/O \u65b9\u5f0f<\/h3>\n
- **read\/write**\uff1a\u6587\u4ef6\u6570\u636e\u52a0\u8f7d\u5230\u9875\u9762\u7f13\u5b58\uff0c\u518d\u62f7\u8d1d\u5230\u7528\u6237\u7a7a\u95f4\uff0cwrite \u53cd\u4e4b\u3002\u9002\u5408\u987a\u5e8f\u8bbf\u95ee\u3002 - **mmap**\uff1a\u5c06\u6587\u4ef6\u6620\u5c04\u5230\u865a\u62df\u5730\u5740\u7a7a\u95f4\uff0c\u76f4\u63a5\u8bbf\u95ee\uff0c\u7701\u53bb\u62f7\u8d1d\u5f00\u9500\uff0c\u9002\u5408\u968f\u673a\u8bbf\u95ee\u3002<\/p>\n
mmap \u5728\u9ad8\u6027\u80fd\u573a\u666f\uff08\u5982\u6570\u636e\u5e93\uff09\u6548\u7387\u66f4\u9ad8\u3002<\/p>\n
\u9875\u9762\u4ea4\u6362<\/h3>\n
\u5185\u5b58\u4e0d\u8db3\u65f6\uff0cLinux \u4f7f\u7528 LRU\uff08\u6700\u8fd1\u6700\u5c11\u4f7f\u7528\uff09\u7b97\u6cd5\u9009\u62e9\u9875\u9762\u4ea4\u6362\u81f3\u78c1\u76d8\u3002\u6587\u4ef6\u80cc\u666f\u9875\u9762\u5199\u56de\u6587\u4ef6\uff0c\u533f\u540d\u9875\u9762\u5199\u5165 Swap\u3002zRAM \u901a\u8fc7\u5185\u5b58\u538b\u7f29\u6a21\u62df Swap\uff0c\u51cf\u5c11\u78c1\u76d8 I\/O\uff0c\u9002\u5408\u5185\u5b58\u53d7\u9650\u73af\u5883\u3002<\/p>\n
\u5b9e\u8df5\u6307\u5357\uff1a\u914d\u7f6e\u4e0e\u5bf9\u6bd4\u5206\u6790<\/h2>\n
\u5728\u540e\u6d6a\u4e91\u7f8e\u56fd VPS\uff08https:\/\/idc.net\/cloud-us<\/a>\uff09\u4e0a\uff0c\u4f18\u5316\u5185\u5b58\u9700\u7ed3\u5408\u76d1\u63a7\u4e0e\u8c03\u6574\u3002\u542f\u7528 zRAM \u793a\u4f8b\uff1a<\/p>\n
\r\n# \u542f\u7528 zRAM\uff08\u5047\u8bbe\u6a21\u5757\u5df2\u52a0\u8f7d\uff09\r\nsudo modprobe zram\r\necho 1G | sudo tee \/sys\/block\/zram0\/disksize\r\nsudo mkswap \/dev\/zram0\r\nsudo swapon \/dev\/zram0<\/code><\/pre>\n
\u9a8c\u8bc1 zRAM \u4f7f\u7528<\/h1>\n
<\/code><\/pre>\n
cat \/sys\/block\/zram0\/mem_used_total<\/p>\n
<\/code><\/pre>\n
\u8f93\u51fa\u793a\u4f8b\uff1a104857600 (100MB)<\/h1>\n
\r\n<\/code><\/pre>\n
<\/code><\/p>\n
 <\/p>\n
\u6280\u672f\u5bf9\u6bd4<\/strong>\uff1a - **read\/write vs mmap**\uff1aread\/write \u9002\u5408\u5c0f\u6587\u4ef6\u987a\u5e8f\u8bbf\u95ee\uff1bmmap \u9002\u5408\u5927\u6587\u4ef6\u968f\u673a\u8bbf\u95ee\uff0c\u51cf\u5c11\u62f7\u8d1d\u3002 - **Swap vs zRAM**\uff1aSwap \u4f9d\u8d56\u78c1\u76d8\uff0cI\/O \u5f00\u9500\u9ad8\uff1bzRAM \u5185\u5b58\u538b\u7f29\uff0c\u901f\u5ea6\u5feb\u4f46\u5360\u7528\u5185\u5b58\u3002<\/p>\n
\u6545\u969c\u6392\u9664<\/strong>\uff1a - **\u9ad8\u5ef6\u8fdf**\uff1a\u68c0\u67e5 \/proc\/meminfo\uff0c\u82e5 buff\/cache \u8fc7\u9ad8\uff0c\u6e05\u7406\u7f13\u5b58\uff1a<\/p>\n
\r\nsudo sync; echo 3 | sudo tee \/proc\/sys\/vm\/drop_caches\r\n<\/code><\/pre>\n
- **\u9891\u7e41 Swap**\uff1a\u68c0\u67e5 \/proc\/vmstat\uff0c\u82e5 pswpin\/pswpout \u9ad8\uff0c\u8c03\u6574 swappiness\uff1a<\/p>\n
\r\necho 10 | sudo tee \/proc\/sys\/vm\/swappiness\r\n<\/code><\/pre>\n
- **\u5185\u5b58\u4e0d\u8db3**\uff1a\u542f\u7528 zRAM \u6216\u68c0\u67e5\u8fdb\u7a0b\u5185\u5b58\uff1a<\/p>\n
\r\ncat \/proc\/\/smaps | grep Anonymous\r\n<\/code><\/pre>\n
\u8fdb\u9636\u6280\u5de7<\/strong>\uff1a\u76d1\u63a7\u9875\u9762\u7f13\u5b58\uff1a<\/p>\n
\r\n# \u67e5\u770b\u7f13\u5b58\u5206\u5e03\r\ncat \/proc\/meminfo | grep -E 'Cached|Active'\r\n# \u8f93\u51fa\u793a\u4f8b\uff1aCached: 600 MB, Active(file): 500 MB\r\n<\/code><\/pre>\n
\u5bf9\u6bd4 Windows\uff0cLinux \u7684\u9875\u9762\u7f13\u5b58\u548c zRAM \u63d0\u4f9b\u66f4\u7075\u6d3b\u7684\u5185\u5b58\u7ba1\u7406\u3002\u53c2\u8003 Linux \u624b\u518c\uff0c\/proc\/meminfo \u63d0\u4f9b\u8be6\u7ec6\u5185\u5b58\u7edf\u8ba1\u3002<\/p>\n
\u603b\u7ed3\u4e0e\u6280\u672f\u7ecf\u9a8c\u5206\u4eab<\/h2>\n
Linux \u5185\u5b58\u7ba1\u7406\u901a\u8fc7\u9875\u9762\u7f13\u5b58\u3001\u533f\u540d\u9875\u9762\u548c\u4ea4\u6362\u673a\u5236\u4f18\u5316\u5185\u5b58\u4e0e\u78c1\u76d8\u4ea4\u4e92\u3002\u672c\u6587\u901a\u8fc7\u6848\u4f8b\u4e0e\u5206\u6790\uff0c\u5c55\u793a\u4e86\u5728 VPS \u73af\u5883\u4e2d\u7684\u4f18\u5316\u5b9e\u8df5\u3002<\/p>\n
\u5728\u540e\u6d6a\u4e91\u5e73\u53f0\uff08\u5982 https:\/\/idc.net\/<\/a>\uff09\u4e0a\uff0c\u9ad8\u6027\u80fd CPU \u548c SSD \u5b58\u50a8\u52a0\u901f\u9875\u9762\u4ea4\u6362\u4e0e\u7f13\u5b58\u64cd\u4f5c\uff0c\u7ed3\u5408\u57df\u540d\u670d\u52a1\uff08https:\/\/idc.net\/domain<\/a>\uff09\uff0c\u4f18\u5316 DNS \u89e3\u6790\uff0c\u63d0\u5347\u5e94\u7528\u6027\u80fd\u3002\u8fd9\u4e9b\u5b9e\u8df5\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u53ef\u9760\u5de5\u5177\uff0c\u52a9\u529b\u6784\u5efa\u9ad8\u6548\u3001\u7a33\u5b9a\u7684\u7cfb\u7edf\u67b6\u6784\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f15\u8a00 Linux \u7684\u5185\u5b58\u7ba1\u7406\u901a\u8fc7\u9875\u9762\u7f13\u5b58\u3001\u533f\u540d\u9875\u9762\u548c\u4ea4\u6362\u673a\u5236\u9ad8\u6548\u534f\u8c03\u5185\u5b58\u4e0e\u78c1\u76d8\u64cd\u4f5c\uff0c\u4f18\u5316\u9ad8\u5e76\u53d1\u670d\u52a1\u5668\u6027\u80fd\u3002\u9875\u9762 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[34,202646],"tags":[],"class_list":["post-441860","post","type-post","status-publish","format-standard","hentry","category-linux","category-hkserver"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/441860","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=441860"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/441860\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=441860"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=441860"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=441860"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}