[[mapper-size]] === Mapper Size Plugin The mapper-size plugin provides the `_size` meta field which, when enabled, indexes the size in bytes of the original {ref}/mapping-source-field.html[`_source`] field. [[mapper-size-install]] [float] ==== Installation This plugin can be installed using the plugin manager: [source,sh] ---------------------------------------------------------------- sudo bin/elasticsearch-plugin install mapper-size ---------------------------------------------------------------- The plugin must be installed on every node in the cluster, and each node must be restarted after installation. [[mapper-size-remove]] [float] ==== Removal The plugin can be removed with the following command: [source,sh] ---------------------------------------------------------------- sudo bin/elasticsearch-plugin remove mapper-size ---------------------------------------------------------------- The node must be stopped before removing the plugin. [[mapper-size-usage]] ==== Using the `_size` field In order to enable the `_size` field, set the mapping as follows: [source,js] -------------------------- PUT my_index { "mappings": { "my_type": { "_size": { "enabled": true } } } } -------------------------- // CONSOLE The value of the `_size` field is accessible in queries: [source,js] -------------------------- # Example documents PUT my_index/my_type/1 { "text": "This is a document" } PUT my_index/my_type/2 { "text": "This is another document" } GET my_index/_search { "query": { "range": { "_size": { <1> "gt": 10 } } } } -------------------------- // CONSOLE // TEST[continued] <1> Querying on the `_size` field