{"action":"created","issue":{"url":"https://api.github.com/repos/alibaba/cobar/issues/52","labels_url":"https://api.github.com/repos/alibaba/cobar/issues/52/labels{/name}","comments_url":"https://api.github.com/repos/alibaba/cobar/issues/52/comments","events_url":"https://api.github.com/repos/alibaba/cobar/issues/52/events","html_url":"https://github.com/alibaba/cobar/issues/52","id":68033661,"number":52,"title":"求教，cobar在select的数据量较大的情况下，有什么调优方法？","user":{"login":"liuxinglanyue","id":1018409,"avatar_url":"https://avatars.githubusercontent.com/u/1018409?v=3","gravatar_id":"","url":"https://api.github.com/users/liuxinglanyue","html_url":"https://github.com/liuxinglanyue","followers_url":"https://api.github.com/users/liuxinglanyue/followers","following_url":"https://api.github.com/users/liuxinglanyue/following{/other_user}","gists_url":"https://api.github.com/users/liuxinglanyue/gists{/gist_id}","starred_url":"https://api.github.com/users/liuxinglanyue/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/liuxinglanyue/subscriptions","organizations_url":"https://api.github.com/users/liuxinglanyue/orgs","repos_url":"https://api.github.com/users/liuxinglanyue/repos","events_url":"https://api.github.com/users/liuxinglanyue/events{/privacy}","received_events_url":"https://api.github.com/users/liuxinglanyue/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":2,"created_at":"2015-04-13T07:54:20Z","updated_at":"2015-06-16T05:56:03Z","closed_at":null,"body":"坐等。。。。"},"comment":{"url":"https://api.github.com/repos/alibaba/cobar/issues/comments/112303805","html_url":"https://github.com/alibaba/cobar/issues/52#issuecomment-112303805","issue_url":"https://api.github.com/repos/alibaba/cobar/issues/52","id":112303805,"user":{"login":"mingxuboy","id":5144173,"avatar_url":"https://avatars.githubusercontent.com/u/5144173?v=3","gravatar_id":"","url":"https://api.github.com/users/mingxuboy","html_url":"https://github.com/mingxuboy","followers_url":"https://api.github.com/users/mingxuboy/followers","following_url":"https://api.github.com/users/mingxuboy/following{/other_user}","gists_url":"https://api.github.com/users/mingxuboy/gists{/gist_id}","starred_url":"https://api.github.com/users/mingxuboy/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mingxuboy/subscriptions","organizations_url":"https://api.github.com/users/mingxuboy/orgs","repos_url":"https://api.github.com/users/mingxuboy/repos","events_url":"https://api.github.com/users/mingxuboy/events{/privacy}","received_events_url":"https://api.github.com/users/mingxuboy/received_events","type":"User","site_admin":false},"created_at":"2015-06-16T05:56:03Z","updated_at":"2015-06-16T05:56:03Z","body":"我个人觉得这个参数用处不大， 在Multinode的情况下（需要从多个节点查询数据），实际上查询几乎是串行的。 单节点（查询参数里面带了分区信息）查询的情况下，这个参数大小对性能应该是没有什么影响的。 我在实际运用中，对于大量数据返回的情况， 计划抛弃Cobar，而采用本地模式（类似于TDDL的方式）。"}}