重复: Couchbase 4 beta “ORDER BY”性能
就像问题标题显示的那样,我面临着巨大的响应延迟,例如使用 Couchbase 4 (N1QL)ORDER BY
子句的一次通话需要 13 秒。如果我不使用ORDER BY
子句,一切都很好。
我的主索引是
Definition: CREATE PRIMARY INDEX `#primary` ON `default` USING GSI
二级索引是
Definition: CREATE INDEX `index_location_name` ON `default`(`name`) USING GSI
N1QL 查询
req.params.filter
可以是位置文档中的任何键。
SELECT _id AS id FROM default WHERE type = 'location' ORDER BY " + req.params.filter + (req.query.descending?' DESC':'') + " LIMIT " + limit + " OFFSET " + 跳过
我的存储桶中的位置文件是
{
"_id": "location::370794",
"name": "Kenai Riverside Fishing",
"avgRating": 0,
"city": "Cooper Landing",
"state": "Alaska",
"country": "USA",
"zipCode": "99572",
"created": "2013-07-10T17:30:00.000Z",
"lastModified": "2015-02-13T12:34:36.923Z",
"type": "location",
}
任何人都可以说出为什么ORDER BY
条款会造成如此多的延迟?