![image.png 如何解决es字段过大引起的性能问题_第1张图片](http://img.e-com-net.com/image/info9/8435346f340142f4841e958936a2ce9f.jpg)
# Index 一本书的信息
PUT books/_doc/1
{
"title":"Mastering ElasticSearch 5.0",
"description":"Master the searching, indexing, and aggregation features in ElasticSearch Improve users’ search experience with Elasticsearch’s functionalities and develop your own Elasticsearch plugins",
"author":"Bharvi Dixit",
"public_date":"2017",
"cover_url":"https://images-na.ssl-images-amazon.com/images/I/51OeaMFxcML.jpg"
}
#查询自动创建的Mapping
GET books/_mapping
DELETE books
优化字段
![image.png 如何解决es字段过大引起的性能问题_第2张图片](http://img.e-com-net.com/image/info9/ddd8e6a771fe447eb4ec3453a0bf8aec.jpg)
#优化字段类型
PUT books
{
"mappings" : {
"properties" : {
"author" : {"type" : "keyword"},
"cover_url" : {"type" : "keyword","index": false},
"description" : {"type" : "text"},
"public_date" : {"type" : "date"},
"title" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 100
}
}
}
}
}
}
#Cover URL index 设置成false,无法对该字段进行搜索
POST books/_search
{
"query": {
"term": {
"cover_url": {
"value": "https://images-na.ssl-images-amazon.com/images/I/51OeaMFxcML.jpg"
}
}
}
}
#Cover URL index 设置成false,依然支持聚合分析
POST books/_search
{
"aggs": {
"cover": {
"terms": {
"field": "cover_url",
"size": 10
}
}
}
}
DELETE books
大字段
![image.png 如何解决es字段过大引起的性能问题_第3张图片](http://img.e-com-net.com/image/info9/8ee012eaa3ae49b483df1cbb58d2e72c.jpg)
#新增 Content字段。数据量很大。选择将Source 关闭
PUT books
{
"mappings" : {
"_source": {"enabled": false},
"properties" : {
"author" : {"type" : "keyword","store": true},
"cover_url" : {"type" : "keyword","index": false,"store": true},
"description" : {"type" : "text","store": true},
"content" : {"type" : "text","store": true},
"public_date" : {"type" : "date","store": true},
"title" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 100
}
},
"store": true
}
}
}
}
# Index 一本书的信息,包含Content
PUT books/_doc/1
{
"title":"Mastering ElasticSearch 5.0",
"description":"Master the searching, indexing, and aggregation features in ElasticSearch Improve users’ search experience with Elasticsearch’s functionalities and develop your own Elasticsearch plugins",
"content":"The content of the book......Indexing data, aggregation, searching. something else. something in the way............",
"author":"Bharvi Dixit",
"public_date":"2017",
"cover_url":"https://images-na.ssl-images-amazon.com/images/I/51OeaMFxcML.jpg"
}
查询图书:解决字段过⼤大引发的性能问题
![image.png 如何解决es字段过大引起的性能问题_第4张图片](http://img.e-com-net.com/image/info9/18acaf2cdb63429b8d5553650d31a310.jpg)
#查询结果中,Source不包含数据
POST books/_search
{}
#搜索,通过store 字段显示数据,同时高亮显示 conent的内容
POST books/_search
{
"stored_fields": ["title","author","public_date"],
"query": {
"match": {
"content": "searching"
}
},
"highlight": {
"fields": {
"content":{}
}
}
}