<\/span><\/h3>\n\n\n\n\u5982\u4e0b\u7528max_insert_threads=4\uff0c\u901a\u8fc7insert select \u521b\u5efa\u4e86tt2\u8868\uff0c\u65e0\u8bbamax_threads\u662f\u591a\u5c11\uff0c\u7ed3\u679c\u7684\u987a\u5e8f\u90fd\u662f\u548c\u539f\u59cb\u7684\u4e0d\u540c\u3002
\u800c\u91c7\u7528max_insert_threads=1\u65f6\uff0c\u5c31\u4fdd\u8bc1\u4e86\u65b0\u8868 tt3\u7684\u6570\u636e\u987a\u5e8f\uff0c\u548c\u539f\u59cb\u7684\u662f\u4e00\u81f4\u7684\u3002<\/p>\n\n\n\n
\rlocalhost :) set max_insert_threads=4;\r\n\r\nSET max_insert_threads = 4\r\n\r\nQuery id: 67211b8d-68fc-4e06-b979-92c1d1563ef2\r\n\r\nOk.\r\n\r\n0 rows in set. Elapsed: 0.002 sec.\r\n\nlocalhost :) create table tt2 engine=MergeTree() order by id as select * from tt;\r\n\r\nCREATE TABLE tt2\r\nENGINE = MergeTree\r\nORDER BY id AS\r\nSELECT *\r\nFROM tt\r\n\r\nQuery id: 066a17d8-6dc3-49e1-9c1b-fda0b293cdff\r\n\r\nOk.\r\n\r\n0 rows in set. Elapsed: 0.031 sec.\r\n\r\nlocalhost :) select * from tt2;\r\n\r\nSELECT *\r\nFROM tt2\r\n\r\nQuery id: 8b593d4d-c13a-4f1b-84b7-d75b1c8fb14c\r\n\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 5 \u2502\r\n\u2502 8 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 6 \u2502\r\n\u2502 7 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\r\n4 rows in set. Elapsed: 0.004 sec.\r\n\r\nlocalhost :) set max_threads=1;\r\n\r\nSET max_threads = 1\r\n\r\nQuery id: 1e90d5a1-1613-437d-9fd3-96d85b4a1712\r\n\r\nOk.\r\n\r\n0 rows in set. Elapsed: 0.007 sec.\r\n\r\nlocalhost :) select * from tt2;\r\n\r\nSELECT *\r\nFROM tt2\r\n\r\nQuery id: faf7c96d-5578-4e55-ae84-bca5c10e6121\r\n\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 6 \u2502\r\n\u2502 7 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 5 \u2502\r\n\u2502 8 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\r\n4 rows in set. Elapsed: 0.004 sec.\r\n\r\nlocalhost :) set max_insert_threads=1;\r\n\r\nSET max_insert_threads = 1\r\n\r\nQuery id: 4d12869d-cbea-4a65-9261-fa28cd33bc2d\r\n\r\nOk.\r\n\r\n0 rows in set. Elapsed: 0.002 sec.\r\n\r\nlocalhost :) create table tt3 engine=MergeTree() order by id as select * from tt;\r\n\r\nCREATE TABLE tt3\r\nENGINE = MergeTree\r\nORDER BY id AS\r\nSELECT *\r\nFROM tt\r\n\r\nQuery id: c1979f16-36b7-48ea-84f9-32a4b55008b7\r\n\r\nOk.\r\n\r\n0 rows in set. Elapsed: 0.024 sec.\r\n\r\nlocalhost :) select * from tt3;\r\n\r\nSELECT *\r\nFROM tt3\r\n\r\nQuery id: f7e7d021-d5c1-48dd-b32d-e60ca6e072b9\r\n\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 5 \u2502\r\n\u2502 6 \u2502\r\n\u2502 7 \u2502\r\n\u2502 8 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\r\n4 rows in set. Elapsed: 0.005 sec.\r\n<\/code><\/pre>\n\n\n\n\u5982\u679c\u6211\u4eec\u518dinsert\u4e00\u4e9b\u6570\u636e\uff0c\u5219\u4f1a\u770b\u5230\u533a\u522b\u3002 \u5728max_threads=1\u65f6\uff0c\u624d\u53ef\u4ee5\u4fdd\u8bc1\u67e5\u8be2\u7ed3\u679c\u987a\u5e8f\u548c\u539f\u59cb\u7684\u4e00\u6837\u3002<\/p>\n\n\n\n
localhost :) insert into tt3 select * from tt;\r\n\r\nINSERT INTO tt3 SELECT *\r\nFROM tt\r\n\r\nQuery id: d48198f3-353e-4d03-9056-fa9545af190f\r\n\r\nOk.\r\n\r\n0 rows in set. Elapsed: 0.005 sec.\r\n\r\nlocalhost :) select * from tt3;\r\n\r\nSELECT *\r\nFROM tt3\r\n\r\nQuery id: 61a11e94-bb43-4c58-8e90-8f8439c02752\r\n\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 5 \u2502\r\n\u2502 6 \u2502\r\n\u2502 7 \u2502\r\n\u2502 8 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 5 \u2502\r\n\u2502 6 \u2502\r\n\u2502 7 \u2502\r\n\u2502 8 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\r\n8 rows in set. Elapsed: 0.005 sec.\r\n\nlocalhost :) insert into tt3 values(10),(11),(12),(13);\r\n\r\nINSERT INTO tt3 VALUES\r\n\r\nQuery id: 203512ef-e2f3-4cb9-87ea-65ea304fb31b\r\n\r\nOk.\r\n\r\n4 rows in set. Elapsed: 0.004 sec.\r\n\r\nlocalhost :) select * from tt3;\r\n\r\nSELECT *\r\nFROM tt3\r\n\r\nQuery id: a2ceae92-f509-4190-8b66-f9c2bc30ee16\r\n\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 10 \u2502\r\n\u2502 11 \u2502\r\n\u2502 12 \u2502\r\n\u2502 13 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 5 \u2502\r\n\u2502 6 \u2502\r\n\u2502 7 \u2502\r\n\u2502 8 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 5 \u2502\r\n\u2502 6 \u2502\r\n\u2502 7 \u2502\r\n\u2502 8 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\r\n12 rows in set. Elapsed: 0.006 sec.\r\n\r\nlocalhost :) set max_threads=1;\r\n\r\nSET max_threads = 1\r\n\r\nQuery id: 78fe8f0f-16a0-4058-bca0-cd740acdeb0d\r\n\r\nOk.\r\n\r\n0 rows in set. Elapsed: 0.003 sec.\r\n\r\nlocalhost :) select * from tt3;\r\n\r\nSELECT *\r\nFROM tt3\r\n\r\nQuery id: dd20e166-6f7a-4235-96a3-b9ca8b7342f8\r\n\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 5 \u2502\r\n\u2502 6 \u2502\r\n\u2502 7 \u2502\r\n\u2502 8 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 5 \u2502\r\n\u2502 6 \u2502\r\n\u2502 7 \u2502\r\n\u2502 8 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\u250c\u2500id\u2500\u2510\r\n\u2502 10 \u2502\r\n\u2502 11 \u2502\r\n\u2502 12 \u2502\r\n\u2502 13 \u2502\r\n\u2514\u2500\u2500\u2500\u2500\u2518\r\n\r\n12 rows in set. Elapsed: 0.005 sec.\r\n\r\nlocalhost :)\r\n<\/code><\/pre>","protected":false},"excerpt":{"rendered":"Clickhouse\u9ed8\u8ba4\u662f\u591a\u7ebf\u7a0b\u5904\u7406\u6570\u636e\uff0c\u5982\u679c\u6ca1\u6709\u6307\u5b9aorder by \uff0c\u5219\u4e0d\u786e\u8ba4\u6570\u636e\u7684\u8fd4\u56de\u987a\u5e8f\u3002\u5982\u679c\u5e0c\u671b\u6309\u7167\u6570\u636e\u63d2\u5165\u65f6\u7684\u987a\u5e8f\u8fd4\u56de\uff0c\u5219\u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u5355\u7ebf\u7a0b\u6765\u5b9e\u73b0\u3002\u672c\u6587\u4ecb\u7ecdmax_threads\u53c2\u6570\u7684\u4f7f\u7528\u4f8b\u5b50\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-5992","post","type-post","status-publish","format-standard","hentry","category-clickhouse"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5992","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/comments?post=5992"}],"version-history":[{"count":9,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5992\/revisions"}],"predecessor-version":[{"id":6285,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/5992\/revisions\/6285"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=5992"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=5992"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=5992"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}