solr 整理，

solr 整理，

1.schema 优化
The version field is by default stored in the inverted index (indexed=”true”). However, for some systems with a very large number of documents, the increase in FieldCache memory requirements may be too costly. A solution can be to declare the version field as DocValues:
Sample field definition

<field name="_version_" type="long" indexed="false" stored="true" required="true" docValues="true"/>

{"id":"mydoc",
 "price":10,
 "popularity":42,
 "categories":["kids"],
 "promo_ids":["a123x"],
 "tags":["free_to_try","buy_now","clearance","on_sale"]
}

And we apply the following update command:

{"id":"mydoc",
 "price":{"set":99},
 "popularity":{"inc":20},
 "categories":{"add":["toys","games"]},
 "promo_ids":{"remove":"a123x"},
 "tags":{"remove":["free_to_try","on_sale"]}
}

The resulting document in our collection will be:

{"id":"mydoc",
 "price":99,
 "popularity":62,
 "categories":["kids","toys","games"],
 "tags":["buy_now","clearance"]
}