{"id":201631,"date":"2025-05-10T10:31:08","date_gmt":"2025-05-10T02:31:08","guid":{"rendered":"https:\/\/server.hk\/cnblog\/201631\/"},"modified":"2025-05-10T10:31:08","modified_gmt":"2025-05-10T02:31:08","slug":"redis%e9%94%ae%e5%80%bc%e8%ae%be%e8%ae%a1%e7%9a%84%e5%ae%9e%e8%b7%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/201631\/","title":{"rendered":"Redis\u952e\u503c\u8bbe\u8ba1\u7684\u5b9e\u8df5"},"content":{"rendered":"<p><b><\/b> <\/p>\n<h1>Redis\u952e\u503c\u8bbe\u8ba1\u7684\u5b9e\u8df5<\/h1>\n<p><span style=\"cursor: pointer\"><i><\/i>\u6536\u85cf<\/span> <\/p>\n<p>\u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300aRedis\u952e\u503c\u8bbe\u8ba1\u7684\u5b9e\u8df5\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0bRedis\u952e\u503c\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002<\/p>\n<p>\u5728Redis\u4e2d\uff0c\u826f\u597d\u7684\u952e\u503c\u8bbe\u8ba1\u53ef\u4ee5\u8fbe\u6210\u4e8b\u534a\u529f\u500d\u7684\u6548\u679c\uff0c\u800c\u4e0d\u597d\u7684\u952e\u503c\u8bbe\u8ba1\u53ef\u80fd\u4f1a\u5e26\u6765Redis\u670d\u52a1\u505c\u6ede\uff0c\u7f51\u7edc\u963b\u585e\uff0cCPU\u4f7f\u7528\u7387\u98d9\u5347\u7b49\u4e00\u7cfb\u5217\u95ee\u9898\uff0c\u4eca\u5929\u5c31\u6559\u5927\u5bb6\u5982\u4f55\u8bbe\u8ba1\u4e00\u4e2a\u826f\u597d\u7684key-value<\/p>\n<h2>1 \u4f18\u96c5\u7684key\u7ed3\u6784<\/h2>\n<p>Redis\u7684Key\u867d\u7136\u53ef\u4ee5\u81ea\u5b9a\u4e49\uff0c\u4f46\u6700\u597d\u9075\u5faa\u4e0b\u9762\u7684\u51e0\u4e2a\u6700\u4f73\u5b9e\u8df5\u7ea6\u5b9a\uff1a<\/p>\n<p><strong>\u9075\u5faa\u57fa\u672c\u683c\u5f0f<\/strong>\uff1a<code>[\u4e1a\u52a1\u540d\u79f0]:[\u6570\u636e\u540d]:[id]<\/code>\uff0c\u4f8b\u5982\u6211\u4eec\u7684\u767b\u5f55\u4e1a\u52a1\uff0c\u9700\u8981\u4fdd\u5b58\u7528\u6237\u4fe1\u606f\uff0c\u5176key\u53ef\u4ee5\u8bbe\u8ba1\u6210\u5982\u4e0b\u683c\u5f0f<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167729144163f96fb1f2543.png\" class=\"aligncenter\"><\/p>\n<p>\u8fd9\u79cd\u8bbe\u8ba1\u7684\u597d\u5904\u4e0d\u4ec5\u5728\u4e8e\u53ef\u8bfb\u6027\u5f3a\uff0c\u8fd8\u5728\u4e8e\u53ef\u4ee5\u907f\u514dkey\u7684\u51b2\u7a81\u95ee\u9898\uff0c\u800c\u4e14\u65b9\u4fbf\u7ba1\u7406<\/p>\n<p><strong>Key\u7684\u957f\u5ea6\u4e0d\u8d85\u8fc744\u5b57\u8282<\/strong><\/p>\n<p>\u65e0\u8bba\u662f\u54ea\u79cd\u6570\u636e\u7c7b\u578b\uff0c key\u90fd\u662fstring\u7c7b\u578b\uff0cstring\u7c7b\u578b\u7684\u5e95\u5c42\u7f16\u7801\u5305\u542bint\u3001embstr\u548craw\u4e09\u79cd\u3002\u5982\u679ckey\u4e2d\u5168\u662f\u6570\u5b57\uff0c\u90a3\u4e48\u5c31\u4f1a\u76f4\u63a5\u4ee5int\u7c7b\u578b\u53bb\u5b58\u50a8\uff0c\u800cint\u5360\u7528\u7684\u7a7a\u95f4\u4e5f\u662f\u6700\u5c0f\u7684\uff0c\u5f53\u7136\u51fa\u4e8e\u4e1a\u52a1\u9700\u6c42\uff0c\u6211\u4eec\u4e0d\u53ef\u80fd\u5c06key\u8bbe\u8ba1\u4e3a\u4e00\u4e2a\u5168\u6570\u5b57\u7684\uff0c\u800c\u5982\u679c\u4e0d\u662f\u7eaf\u6570\u5b57\uff0c\u5e95\u5c42\u5b58\u50a8\u7684\u5c31\u662fSDS\u5185\u5bb9\uff0c\u5982\u679c\u5c0f\u4e8e44\u5b57\u8282\uff0c\u5c31\u4f1a\u4f7f\u7528embstr\u7c7b\u578b\uff0cembstr\u5728\u5185\u5b58\u4e2d\u662f\u4e00\u6bb5\u8fde\u7eed\u7684\u5b58\u50a8\u7a7a\u95f4\uff0c\u5185\u5b58\u5360\u7528\u76f8\u5bf9raw\u6765\u8bf4\u8f83\u5c0f\uff0c\u800c\u5f53\u5b57\u8282\u6570\u5927\u4e8e44\u5b57\u8282\u65f6\uff0c\u4f1a\u8f6c\u4e3araw\u6a21\u5f0f\u5b58\u50a8\uff0c\u5728raw\u6a21\u5f0f\u4e0b\uff0c\u5185\u5b58\u7a7a\u95f4\u4e0d\u662f\u8fde\u7eed\u7684\uff0c\u800c\u662f\u91c7\u7528\u4e00\u4e2a\u6307\u9488\u6307\u5411\u4e86\u53e6\u5916\u4e00\u6bb5\u5185\u5b58\u7a7a\u95f4\uff0c\u5728\u8fd9\u6bb5\u7a7a\u95f4\u91cc\u5b58\u50a8SDS\u5185\u5bb9\uff0c\u8fd9\u6837\u7a7a\u95f4\u4e0d\u8fde\u7eed\uff0c\u8bbf\u95ee\u7684\u65f6\u5019\u6027\u80fd\u4e5f\u5c31\u4f1a\u6536\u5230\u5f71\u54cd\uff0c\u8fd8\u6709\u53ef\u80fd\u4ea7\u751f\u5185\u5b58\u788e\u7247<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u4f60\u7684redis\u7248\u672c\u4f4e\u4e8e4.0\uff0c\u90a3\u4e48\u754c\u9650\u662f39\u5b57\u8282\u800c\u975e44\u5b57\u8282<\/p>\n<p><strong>Key\u4e2d\u4e0d\u5305\u542b\u4e00\u4e9b\u7279\u6b8a\u5b57\u7b26<\/strong><\/p>\n<h2>2 \u62d2\u7eddBigKey<\/h2>\n<h3>2.1 \u5224\u65adBigKey<\/h3>\n<p>BigKey\u987e\u540d\u601d\u4e49\u5c31\u662f\u4e00\u4e2a\u5f88\u5927\u7684Key\uff0c\u8fd9\u91cc\u7684\u5927\u5e76\u4e0d\u662f\u6307Key\u672c\u8eab\u5f88\u5927\uff0c\u800c\u662f\u6307\u5305\u62ec\u8fd9\u4e2aKey\u7684Value\u5728\u5185\u7684\u4e00\u6574\u4e2a\u952e\u503c\u5bf9\u5f88\u5927<\/p>\n<p>BigKey\u901a\u5e38\u4ee5Key-Value\u7684\u5927\u5c0f\u6216\u8005Key\u4e2d\u6210\u5458\u7684\u6570\u91cf\u6765\u7efc\u5408\u5224\u5b9a\uff0c\u4f8b\u5982\uff1a<\/p>\n<ul>\n<li>Key\u7684Value\u8fc7\u5927\uff1a\u4f8b\u5982\u4e00\u4e2aString\u7c7b\u578b\u7684Key\uff0c\u5b83\u7684Value\u4e3a5MB<\/li>\n<li>Key\u4e2d\u7684\u6210\u5458\u6570\u8fc7\u591a\uff1a\u4f8b\u5982\u4e00\u4e2aZSET\u7c7b\u578b\u7684Key\uff0c\u5b83\u7684\u6210\u5458\u6570\u91cf\u4e3a10000\u4e2a<\/li>\n<li>Key\u4e2d\u6210\u5458\u7684Value\u8fc7\u5927\uff1a\u4f8b\u5982\u4e00\u4e2aHash\u7c7b\u578b\u7684Key\uff0c\u5b83\u7684\u6210\u5458\u6570\u91cf\u867d\u7136\u53ea\u67091000\u4e2a\uff0c\u4f46\u8fd9\u4e9b\u6210\u5458\u7684Value\u603b\u5927\u5c0f\u4e3a100 MB<\/li>\n<\/ul>\n<p>\u90a3\u4e48\u5982\u4f55\u5224\u65ad\u5143\u7d20\u7684\u5927\u5c0f\u5462\uff1fredis\u4e2d\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u76f8\u5e94\u7684\u547d\u4ee4\uff0c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>memory usage \u952e\u540d<\/pre>\n<p>\u8fd9\u6761\u547d\u4ee4\u4f1a\u8fd4\u56de\u4e00\u6761\u6570\u636e\u5360\u7528\u5185\u5b58\u7684\u603b\u5927\u5c0f\uff0c\u8fd9\u4e2a\u5927\u5c0f\u4e0d\u4ec5\u5305\u62ecKey\u548cValue\u7684\u5927\u5c0f\uff0c\u8fd8\u5305\u62ec\u6570\u636e\u5b58\u50a8\u65f6\u7684\u4e00\u4e9b\u5143\u4fe1\u606f\uff0c\u56e0\u6b64\u53ef\u80fd\u4f60\u7684Key\u4e0eValue\u53ea\u5360\u7528\u4e86\u51e0\u5341\u4e2a\u5b57\u8282\uff0c\u4f46\u6700\u7ec8\u7684\u8fd4\u56de\u7ed3\u679c\u662f\u51e0\u767e\u4e2a\u5b57\u8282<\/p>\n<p>\u4f46\u662f\u6211\u4eec\u4e00\u822c\u4e0d\u63a8\u8350\u4f7f\u7528memory\u6307\u4ee4\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u6307\u4ee4\u5bf9CPU\u7684\u5360\u7528\u7387\u662f\u5f88\u9ad8\u7684\uff0c\u5b9e\u9645\u5f00\u53d1\u4e2d\u6211\u4eec\u4e00\u822c\u53ea\u9700\u8981\u8861\u91cfValue\u7684\u5927\u5c0f\u6216\u8005Key\u4e2d\u7684\u6210\u5458\u6570\u5373\u53ef<\/p>\n<p>\u4f8b\u5982\u5982\u679c\u6211\u4eec\u4f7f\u7528\u7684\u6570\u636e\u7c7b\u578b\u662fString\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff0c\u8fd4\u56de\u7684\u7ed3\u679c\u662fValue\u7684\u957f\u5ea6<\/p>\n<pre>strlen \u952e\u540d<\/pre>\n<p>\u5982\u679c\u6211\u4eec\u4f7f\u7528\u7684\u6570\u636e\u7c7b\u578b\u662fList\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff0c\u8fd4\u56de\u7684\u7ed3\u679c\u662fList\u4e2d\u6210\u5458\u7684\u4e2a\u6570<\/p>\n<pre>llen \u952e\u540d<\/pre>\n<p>\u4e00\u822c\u6211\u4eec\u63a8\u8350\uff0c\u5355\u4e2akey\u7684value\u5c0f\u4e8e10KB\uff0c\u96c6\u5408\u7c7b\u578b\u7684key\u5143\u7d20\u6570\u91cf\u5c0f\u4e8e1000<\/p>\n<h3>2.2 BigKey\u7684\u5371\u5bb3<\/h3>\n<p><strong>\u7f51\u7edc\u963b\u585e<\/strong><\/p>\n<p>\u5f53\u6211\u4eec\u5bf9\u4e00\u4e2aBigKey\u53d1\u8d77\u8bfb\u8bf7\u6c42\u65f6\uff0c\u53ea\u9700\u5c11\u91cf\u7684QPS\u5c31\u53ef\u80fd\u5bfc\u81f4\u5e26\u5bbd\u4f7f\u7528\u7387\u88ab\u5360\u6ee1\uff0c\u5bfc\u81f4Redis\u5b9e\u4f8b\u4e43\u81f3\u6240\u5728\u7269\u7406\u673a\u53d8\u6162\uff0c\u4f8b\u5982\u4e00\u4e2abigkey\u5360\u75285M\u5185\u5b58\uff0c\u53ea\u9700\u8981QPS\u8fbe\u523020\uff0c\u90a3\u4e481\u79d2\u949f\u5c31\u4f1a\u5360100M\u7684\u5e26\u5bbd<\/p>\n<p><strong>\u6570\u636e\u503e\u659c<\/strong><\/p>\n<p>\u96c6\u7fa4\u73af\u5883\u4e0b\uff0c\u7531\u4e8e\u6240\u6709\u63d2\u69fd\u4e00\u5f00\u59cb\u90fd\u662f\u5747\u8861\u5206\u914d\u7684\uff0c\u56e0\u6b64BigKey\u6240\u5728\u7684Redis\u5b9e\u4f8b\u5185\u5b58\u4f7f\u7528\u7387\u4f1a\u8fdc\u8d85\u5176\u4ed6\u5b9e\u4f8b\uff0c\u4ece\u800c\u65e0\u6cd5\u4f7f\u6570\u636e\u5206\u7247\u7684\u5185\u5b58\u8d44\u6e90\u8fbe\u5230\u5747\u8861\uff0c\u6700\u540e\u4e0d\u5f97\u4e0d\u624b\u52a8\u91cd\u65b0\u5206\u914d\u63d2\u69fd\uff0c\u589e\u52a0\u8fd0\u7ef4\u4eba\u5458\u7684\u8d1f\u62c5<\/p>\n<p><strong>Redis\u963b\u585e<\/strong><\/p>\n<p>\u5bf9\u5143\u7d20\u8f83\u591a\u7684hash\u3001list\u3001zset\u7b49\u505a\u8fd0\u7b97\u4f1a\u8017\u65f6\u8f83\u4e45\uff0c\u800c\u4e14\u7531\u4e8eRedis\u662f\u5355\u7ebf\u7a0b\u7684\uff0c\u5728\u8fd0\u7b97\u8fc7\u7a0b\u4e2d\u4f1a\u5bfc\u81f4\u670d\u52a1\u963b\u585e\uff0c\u65e0\u6cd5\u63a5\u6536\u5176\u4ed6\u7528\u6237\u8bf7\u6c42<\/p>\n<p><strong>CPU\u538b\u529b<\/strong><\/p>\n<p>\u5bf9BigKey\u7684\u6570\u636e\u8fdb\u884c\u5e8f\u5217\u5316\u6216\u53cd\u5e8f\u5217\u5316\u90fd\u4f1a\u5bfc\u81f4CPU\u7684\u4f7f\u7528\u7387\u98d9\u5347\uff0c\u5f71\u54cdRedis\u5b9e\u4f8b\u548c\u672c\u673a\u5176\u5b83\u5e94\u7528<\/p>\n<h3>2.3 \u5982\u4f55\u53d1\u73b0BigKey<\/h3>\n<p>\u65e2\u7136\u6211\u4eec\u77e5\u9053\u4e86\u4ec0\u4e48\u53ebBigKey\u4ee5\u53caBigKey\u7684\u5371\u5bb3\uff0c\u90a3\u4e48\u5982\u4f55\u53bb\u5feb\u901f\u53d1\u73b0Redis\u4e2d\u6240\u6709\u7684BigKey\u5462\uff1f\u8fd9\u91cc\u4e3a\u5927\u5bb6\u63d0\u4f9b\u4ee5\u4e0b\u51e0\u79cd\u65b9\u6848\uff1a<\/p>\n<p>1\uff09<strong>\u5229\u7528Redis\u672c\u8eab\u63d0\u4f9b\u7684\u547d\u4ee4<\/strong><\/p>\n<p>\u5229\u7528\u4ee5\u4e0b\u547d\u4ee4\uff0c\u53ef\u4ee5\u904d\u5386\u5206\u6790\u6240\u6709key\uff0c\u5e76\u8fd4\u56deKey\u7684\u6574\u4f53\u7edf\u8ba1\u4fe1\u606f\u4e0e\u6bcf\u79cd\u6570\u636e\u7c7b\u578b\u4e2dTop1\u7684BigKey<\/p>\n<pre>redis-cli -a \u5bc6\u7801 --bigkeys<\/pre>\n<p>\u6f14\u793a\u5982\u4e0b\uff08\u8fd9\u91cc\u6211\u7684redis\u6ca1\u6709\u8bbe\u7f6e\u5bc6\u7801\uff0c\u5982\u679c\u4f60\u7684redis\u8bbe\u7f6e\u4e86\u5bc6\u7801\uff0c\u5219\u9700\u8981\u4f7f\u7528 <code>-a \u5bc6\u7801 <\/code>\u8fdb\u884c\u8fde\u63a5\uff09<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167729144263f96fb2667e7.jpg\" class=\"aligncenter\"><\/p>\n<p>2\uff09<strong>\u81ea\u5df1\u624b\u52a8\u7f16\u5199\u7a0b\u5e8f\u8fdb\u884c\u626b\u63cf<\/strong><\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u81ea\u5df1\u7f16\u5199\u7a0b\u5e8f\uff0c\u5c06Redis\u4e2d\u6240\u6709\u7684\u6570\u636e\u67e5\u8be2\u51fa\u6765\u5e76\u4e00\u4e00\u7edf\u8ba1\u957f\u5ea6\u6765\u627e\u51faBigKey\uff0c\u8fd9\u91cc\u4e0d\u5efa\u8bae\u4f7f\u7528<code>keys *<\/code>\u6765\u67e5\u8be2\u6240\u6709\u6570\u636e\uff0c\u56e0\u4e3a<code>keys *<\/code> \u662f\u4e00\u6b21\u5c06\u6240\u6709\u7684\u6570\u636e\u5168\u90e8\u67e5\u627e\u51fa\u6765\uff0c\u5982\u679c\u6570\u636e\u91cf\u5f88\u5927\uff0c<code>key *<\/code>\u4e00\u6b21\u53ef\u80fd\u8981\u51e0\u5341\u79d2\u751a\u81f3\u51e0\u5206\u949f\uff0c\u5728\u5982\u6b64\u957f\u7684\u65f6\u95f4\u5185\uff0cRedis\u7684\u4e3b\u7ebf\u7a0b\u4f1a\u56e0\u4e3a\u6267\u884c\u8be5\u547d\u4ee4\u800c\u88ab\u963b\u585e\u3002<\/p>\n<p>\u8fd9\u91cc\u5efa\u8bae\u4f7f\u7528redis\u63d0\u4f9b\u7684scan\u547d\u4ee4\uff0c\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>scan \u8d77\u59cb\u4f4d\u7f6e count \u6570\u91cf<\/pre>\n<p>scan\u626b\u63cf\u6709\u70b9\u7c7b\u4f3c\u4e8e\u5206\u9875\u67e5\u8be2\uff0c\u800c\u88ab\u5206\u9875\u7684\u5bf9\u8c61\u662fredis\u4e2d\u6240\u6709\u7684\u6570\u636e\uff0cscan\u547d\u4ee4\u8c03\u7528\u4e00\u6b21\u53ea\u4f1a\u4ece\u6307\u5b9a\u7684\u8d77\u59cb\u4f4d\u7f6e\u5f00\u59cb\u8fd4\u56de\u6307\u5b9a\u6570\u91cf\u7684\u6570\u636e\uff0c\u4ee5\u53ca\u6b64\u6b21\u626b\u63cf\u7ed3\u675f\u65f6\u5149\u6807\u6240\u5728\u7684\u4f4d\u7f6e\uff0c\u4e0b\u4e00\u6b21\u626b\u63cf\u65f6\u5c31\u9700\u8981\u4ece\u8fd9\u4e2a\u5149\u6807\u5f00\u59cb\u7ee7\u7eed\u5f80\u4e0b\u626b\u63cf<\/p>\n<p>\u8fd9\u91cc\u63d0\u4f9b\u4e00\u4e2a\u5df2\u7ecf\u7f16\u5199\u597d\u7684\u67e5\u627eBigKey\u7684\u6d4b\u8bd5\u7c7b\uff0c\u5927\u5bb6\u53ef\u4ee5\u53c2\u8003\u4e00\u4e0b<\/p>\n<pre>import com.heima.jedis.util.JedisConnectionFactory;\nimport org.junit.jupiter.api.AfterEach;\nimport org.junit.jupiter.api.BeforeEach;\nimport org.junit.jupiter.api.Test;\nimport redis.clients.jedis.Jedis;\nimport redis.clients.jedis.ScanResult;\n\nimport java.util.HashMap;\nimport java.util.List;\nimport java.util.Map;\n\npublic class JedisTest {\n    private Jedis jedis;\n\n    @BeforeEach\n    void setUp() {\n        \/\/ 1.\u5efa\u7acb\u8fde\u63a5\n        \/\/ jedis = new Jedis(\"192.168.150.101\", 6379);\n        jedis = JedisConnectionFactory.getJedis();\n        \/\/ 2.\u8bbe\u7f6e\u5bc6\u7801\n        jedis.auth(\"123321\");\n        \/\/ 3.\u9009\u62e9\u5e93\n        jedis.select(0);\n    }\n\n    \/\/\u8bbe\u7f6estring\u7c7b\u578b\u7684\u957f\u5ea6\u4e0a\u9650\uff0c\u8d85\u8fc7\u8fd9\u4e2a\u4e0a\u9650\u5c31\u5224\u65ad\u4e3aBigKey\n    final static int STR_MAX_LEN = 10 * 1024;\n    \/\/\u8bbe\u7f6e\u96c6\u5408\u7c7b\u578b\u5141\u8bb8\u7684\u6210\u5458\u6570\u91cf\u4e0a\u9650\uff0c\u8d85\u8fc7\u8fd9\u4e2a\u4e0a\u9650\u5c31\u5224\u65ad\u4e3aBigKey\n    final static int HASH_MAX_LEN = 500;\n\n    @Test\n    void testScan() {\n        int maxLen = 0;\n        long len = 0;\n\n        String cursor = \"0\";\n        do {\n            \/\/ \u626b\u63cf\u5e76\u83b7\u53d6\u4e00\u90e8\u5206key\n            ScanResult\n   \n     result = jedis.scan(cursor);\n            \/\/ \u8bb0\u5f55cursor\n            cursor = result.getCursor();\n            List\n    \n      list = result.getResult(); if (list == null || list.isEmpty()) { break; } \/\/ \u904d\u5386 for (String key : list) { \/\/ \u5224\u65adkey\u7684\u7c7b\u578b String type = jedis.type(key); switch (type) { case \"string\": len = jedis.strlen(key); maxLen = STR_MAX_LEN; break; case \"hash\": len = jedis.hlen(key); maxLen = HASH_MAX_LEN; break; case \"list\": len = jedis.llen(key); maxLen = HASH_MAX_LEN; break; case \"set\": len = jedis.scard(key); maxLen = HASH_MAX_LEN; break; case \"zset\": len = jedis.zcard(key); maxLen = HASH_MAX_LEN; break; default: break; } if (len &gt;= maxLen) { System.out.printf(\"Found big key : %s, type: %s, length or size: %d %n\", key, type, len); } } } while (!cursor.equals(\"0\")); } @AfterEach void tearDown() { if (jedis != null) { jedis.close(); } } } \n    \n   <\/pre>\n<p>3\uff09<strong>\u7b2c\u4e09\u65b9\u5de5\u5177<\/strong><\/p>\n<p>\u5229\u7528\u7b2c\u4e09\u65b9\u5de5\u5177\uff0c\u8fd9\u91cc\u63a8\u8350Redis-Rdb-Tools\uff0c\u5b83\u4f1a\u9488\u5bf9Redis\u7684RDB\u5feb\u7167\u6587\u4ef6\u6765\u5206\u6790\u5185\u5b58\u4f7f\u7528\u60c5\u51b5\uff0c\u7531\u4e8e\u5206\u6790\u7684\u662f\u5feb\u7167\u6587\u4ef6\uff0c\u56e0\u6b64\u4e0d\u4f1a\u5360\u7528Redis\u670d\u52a1\u7684\u4efb\u4f55\u6027\u80fd\uff0c\u4f46\u662f\u65f6\u6548\u6027\u76f8\u5bf9\u8f83\u5dee<\/p>\n<p>Redis-Rdb-Tools\u7684github\u7f51\u5740\uff1a<\/p>\n<p>4\uff09<strong>\u7f51\u7edc\u76d1\u63a7<\/strong><\/p>\n<p>\u4f7f\u7528\u81ea\u5b9a\u4e49\u5de5\u5177\uff0c\u76d1\u63a7\u8fdb\u51faRedis\u7684\u7f51\u7edc\u6570\u636e\uff0c\u8d85\u51fa\u9884\u8b66\u503c\u65f6\u4e3b\u52a8\u544a\u8b66\u3002\u4e00\u822c\u963f\u91cc\u4e91\u642d\u5efa\u7684\u4e91\u670d\u52a1\u5668\u5c31\u6709\u76f8\u5173\u76d1\u63a7\u9875\u9762\uff1a<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167729144263f96fb2cd048.png\" class=\"aligncenter\"><\/p>\n<h3>2.4 \u5982\u4f55\u5220\u9664BigKey<\/h3>\n<p>BigKey\u5185\u5b58\u5360\u7528\u8f83\u591a\uff0c\u56e0\u6b64\u5373\u4fbf\u6211\u4eec\u4f7f\u7528\u7684\u662f\u5220\u9664\u64cd\u4f5c\uff0c\u5220\u9664BigKey\u4e5f\u9700\u8981\u8017\u8d39\u5f88\u957f\u65f6\u95f4\uff0c\u5bfc\u81f4Redis\u4e3b\u7ebf\u7a0b\u963b\u585e\uff0c\u5f15\u53d1\u4e00\u7cfb\u5217\u95ee\u9898\u3002<\/p>\n<p>\u5982\u679credis\u7248\u672c\u57284.0\u4e4b\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u5f02\u6b65\u5220\u9664\u547d\u4ee4unlink\u6765\u5220\u9664\u4e00\u4e2aBigKey\uff0c\u8be5\u547d\u4ee4\u4f1a\u5148\u628a\u6570\u636e\u6807\u8bb0\u4e3a\u5df2\u5220\u9664\uff0c\u7136\u540e\u518d\u5f02\u6b65\u6267\u884c\u5220\u9664\u64cd\u4f5c\u3002<\/p>\n<p>\u5982\u679credis\u7248\u672c\u57284.0\u4e4b\u524d\uff0c\u9488\u5bf9\u96c6\u5408\u7c7b\u578b\uff0c\u6211\u4eec\u53ef\u4ee5\u5148\u904d\u5386BigKey\u4e2d\u6240\u6709\u7684\u5143\u7d20\uff0c\u5148\u5c06\u5b50\u5143\u7d20\u9010\u4e2a\u5220\u9664\uff0c\u6700\u540e\u518d\u5220\u9664BigKey\u3002\u81f3\u4e8e\u5982\u4f55\u904d\u5386\uff0c\u9488\u5bf9\u4e0d\u540c\u7684\u96c6\u5408\u7c7b\u578b\uff0c\u53ef\u4ee5\u53c2\u8003\u4ee5\u4e0b\u4e0d\u540c\u7684\u547d\u4ee4<\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20230225\/167729144363f96fb342865.png\" class=\"aligncenter\"><\/p>\n<h2>3 \u6070\u5f53\u7684\u6570\u636e\u7c7b\u578b<\/h2>\n<p>\u627e\u51faBigKey\u4e2d\uff0c\u6211\u4eec\u5e94\u8be5\u5982\u4f55\u5bf9BigKey\u8fdb\u884c\u4f18\u5316\u5462\uff1f\u8fd9\u91cc\u6211\u4eec\u9700\u8981\u9009\u62e9\u6070\u5f53\u7684\u6570\u636e\u7c7b\u578b<\/p>\n<h3>3.1 \u5b58\u50a8\u5bf9\u8c61<\/h3>\n<p>\u5982\u679c\u6211\u4eec\u8981\u5b58\u50a8\u4e00\u4e2aUser\u5bf9\u8c61\uff0c\u6709\u4e09\u79cd\u5b58\u50a8\u65b9\u5f0f\uff1a<\/p>\n<p>1\uff09<strong>JSON\u5b57\u7b26\u4e32<\/strong><\/p>\n<p>\u5c06\u4e00\u6574\u4e2a\u5bf9\u8c61\u8f6c\u6210Json\u683c\u5f0f\u8fdb\u884c\u5b58\u50a8<\/p>\n<table>\n<tbody>\n<tr>\n<th>user:1<\/th>\n<th>{\u201cname\u201d: \u201cJack\u201d, \u201cage\u201d: 21}<\/th>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4f18\u70b9\uff1a\u5b9e\u73b0\u7b80\u5355\u7c97\u66b4<\/p>\n<p>\u7f3a\u70b9\uff1a\u6570\u636e\u8026\u5408\uff0c\u4e0d\u591f\u7075\u6d3b\uff0c\u4e14\u9700\u8981\u7ef4\u62a4JSON\u7ed3\u6784\uff0c\u5360\u7528\u5185\u5b58\u76f8\u5bf9\u8f83\u5927<\/p>\n<p>2\uff09<strong>\u5b57\u6bb5\u6253\u6563<\/strong><\/p>\n<p>\u5c06\u5bf9\u8c61\u7684\u4e0d\u540c\u5c5e\u6027\u5b58\u50a8\u5230\u4e0d\u540c\u7684key\u4e2d<\/p>\n<table>\n<tbody>\n<tr>\n<th>key<\/th>\n<th>value<\/th>\n<\/tr>\n<tr>\n<td>user:1:name<\/td>\n<td>Jack<\/td>\n<\/tr>\n<tr>\n<td>user:1:age<\/td>\n<td>21<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4f18\u70b9\uff1a\u53ef\u4ee5\u7075\u6d3b\u8bbf\u95ee\u5bf9\u8c61\u4efb\u610f\u5b57\u6bb5<\/p>\n<p>\u7f3a\u70b9\uff1a\u7531\u4e8e\u6bcf\u6761\u6570\u636e\u90fd\u4f1a\u6709\u4e00\u4e9b\u5143\u4fe1\u606f\u9700\u8981\u5b58\u50a8\uff0c\u56e0\u6b64\u5c06\u4e00\u4e2aKey\u5206\u6210\u591a\u4e2aKey\u8fdb\u884c\u5b58\u50a8\uff0c\u5360\u7528\u7684\u5185\u5b58\u4f1a\u53d8\u7684\u66f4\u5927\uff0c\u4e14\u7531\u4e8e\u5b57\u6bb5\u5206\u6563\uff0c\u5f53\u6211\u4eec\u9700\u8981\u505a\u7edf\u4e00\u63a7\u5236\u65f6\u4f1a\u53d8\u5f97\u5f88\u56f0\u96be<\/p>\n<p>3\uff09<strong>hash\uff08\u63a8\u8350\uff09<\/strong><\/p>\n<p>\u4f7f\u7528hash\u7ed3\u6784\u6765\u5b58\u50a8\u5bf9\u8c61\uff0c\u5bf9\u8c61\u7684\u4e00\u4e2a\u5c5e\u6027\u5bf9\u5e94\u96c6\u5408\u4e2d\u7684\u4e00\u4e2a\u6210\u5458<\/p>\n<table>\n<tbody>\n<tr>\n<td>user:1<\/td>\n<td>name<\/td>\n<td>jack<\/td>\n<\/tr>\n<tr>\n<td>age<\/td>\n<td>21<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u4f18\u70b9\uff1ahash\u7ed3\u6784\u5e95\u5c42\u4f1a\u4f7f\u7528ziplist\u538b\u7f29\u5217\u8868\uff0c\u7a7a\u95f4\u5360\u7528\u5c0f\uff0c\u4e14\u53ef\u4ee5\u7075\u6d3b\u8bbf\u95ee\u5bf9\u8c61\u7684\u4efb\u610f\u5b57\u6bb5<\/p>\n<p>\u7f3a\u70b9\uff1a\u4ee3\u7801\u7f16\u5199\u65f6\u76f8\u5bf9\u590d\u6742<\/p>\n<h3>3.2 Hash\u4f18\u5316<\/h3>\n<p>\u5047\u5982\u6709\u4e00\u4e2ahash\u7c7b\u578b\u7684key\uff0c\u5176\u4e2d\u6709100\u4e07\u5bf9field\u548cvalue\uff0cfield\u662f\u81ea\u589eid\uff0c\u8fd9\u4e2akey\u5b58\u5728\u4ec0\u4e48\u95ee\u9898\uff1f\u5982\u4f55\u4f18\u5316\uff1f<\/p>\n<table>\n<tbody>\n<tr>\n<td>key<\/td>\n<td>field<\/td>\n<td>value<\/td>\n<\/tr>\n<tr>\n<td>someKey<\/td>\n<td>id:0<\/td>\n<td>value0<\/td>\n<\/tr>\n<tr>\n<td>&#8230;..<\/td>\n<td>&#8230;..<\/td>\n<\/tr>\n<tr>\n<td>id:999999<\/td>\n<td>value999999<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5f53hash\u7684entry\u6570\u91cf\u8d85\u8fc7500\u65f6\uff0c\u5e95\u5c42\u4f1a\u4f7f\u7528\u54c8\u5e0c\u8868\u5b58\u50a8\u800c\u4e0d\u662fZipList\uff0c\u5185\u5b58\u5360\u7528\u4f1a\u53d8\u5f97\u6bd4\u8f83\u9ad8\uff0c\u867d\u7136\u8fd9\u4e2a\u6570\u91cf\u9650\u5236\u6211\u4eec\u662f\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u547d\u4ee4\u8fdb\u884c\u4fee\u6539\u7684<\/p>\n<pre>config set hash-max-ziplist-entries \u6570\u91cf<\/pre>\n<p>\u4f46\u662fentry\u6570\u91cf\u5982\u679c\u5b9e\u5728\u592a\u5927\u4e86\u8fd8\u662f\u4f1a\u5bfc\u81f4BigKey\u95ee\u9898\uff0c\u8fd9\u662f\u9700\u8981\u4f18\u5316\u7684\uff0c\u8fd9\u91cc\u63d0\u4f9b\u4ee5\u4e0b\u4e24\u79cd\u89e3\u51b3\u601d\u8def\uff1a<\/p>\n<p>1\uff09<strong>\u62c6\u5206\u4e3aString\u7c7b\u578b\uff08\u4e0d\u63a8\u8350\uff09<\/strong><\/p>\n<p>\u5c06Hash\u4e2d\u7684\u6bcf\u4e2a\u6210\u5458\u5355\u72ec\u4f7f\u7528\u4e00\u4e2aString\u7c7b\u578b\u7684key\u8fdb\u884c\u5b58\u50a8<\/p>\n<table>\n<tbody>\n<tr>\n<td>key<\/td>\n<td>value<\/td>\n<\/tr>\n<tr>\n<td>id:0<\/td>\n<td>value0<\/td>\n<\/tr>\n<tr>\n<td>&#8230;..<\/td>\n<td>&#8230;..<\/td>\n<\/tr>\n<tr>\n<td>id:999999<\/td>\n<td>value999999<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u8fd9\u79cd\u65b9\u6848\u662f\u4e0d\u63a8\u8350\u7684\uff0c\u5b58\u5728\u7684\u95ee\u9898\u5982\u4e0b<\/p>\n<ul>\n<li>string\u7ed3\u6784\u5e95\u5c42\u6ca1\u6709\u592a\u591a\u5185\u5b58\u4f18\u5316\u7684\uff0c\u4e14\u5b58\u50a8\u8fd9\u4e9bkey\u7684\u540c\u65f6\u4e5f\u4f1a\u5b58\u50a8\u5927\u91cf\u7684\u5143\u4fe1\u606f\uff0c\u867d\u7136\u6570\u636e\u6253\u6563\u4e86\uff0c\u4f46\u662f\u6574\u4f53\u5185\u5b58\u5360\u7528\u66f4\u591a\u4e86<\/li>\n<li>\u5982\u679c\u6211\u4eec\u60f3\u8981\u6279\u91cf\u83b7\u53d6\u8fd9\u4e9b\u6570\u636e\uff0c\u4f1a\u53d8\u5f97\u683c\u5916\u9ebb\u70e6<\/li>\n<\/ul>\n<p>2\uff09<strong>\u62c6\u5206\u6210\u591a\u4e2aHash\u7c7b\u578b<\/strong><\/p>\n<p>\u62c6\u5206\u4e3a\u5c0f\u7684hash\uff0c\u5c06 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