{"action":"opened","issue":{"url":"https://api.github.com/repos/greenplum-db/gpdb/issues/1021","repository_url":"https://api.github.com/repos/greenplum-db/gpdb","labels_url":"https://api.github.com/repos/greenplum-db/gpdb/issues/1021/labels{/name}","comments_url":"https://api.github.com/repos/greenplum-db/gpdb/issues/1021/comments","events_url":"https://api.github.com/repos/greenplum-db/gpdb/issues/1021/events","html_url":"https://github.com/greenplum-db/gpdb/issues/1021","id":169303430,"number":1021,"title":"how to reduce the time \"sort\" and \"group by\" operation takes?","user":{"login":"GuoLiuFang","id":10841581,"avatar_url":"https://avatars.githubusercontent.com/u/10841581?v=3","gravatar_id":"","url":"https://api.github.com/users/GuoLiuFang","html_url":"https://github.com/GuoLiuFang","followers_url":"https://api.github.com/users/GuoLiuFang/followers","following_url":"https://api.github.com/users/GuoLiuFang/following{/other_user}","gists_url":"https://api.github.com/users/GuoLiuFang/gists{/gist_id}","starred_url":"https://api.github.com/users/GuoLiuFang/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/GuoLiuFang/subscriptions","organizations_url":"https://api.github.com/users/GuoLiuFang/orgs","repos_url":"https://api.github.com/users/GuoLiuFang/repos","events_url":"https://api.github.com/users/GuoLiuFang/events{/privacy}","received_events_url":"https://api.github.com/users/GuoLiuFang/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2016-08-04T06:52:18Z","updated_at":"2016-08-04T06:52:18Z","closed_at":null,"body":"this my `explain analyze `\r\nI find sort and \"group by\" take almost all the time..and How to avoid Workfile spillling?\r\nany idea is welcome.\r\n![Markdown](http://i2.piimg.com/1949/5f659c90f675c844.png)\r\n"}}
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