anchor.diff:  [[search-multi-search-api-request]]
   ==== {api-request-title}
   
  -`GET /<index>/_msearch`
  +`GET /<target>/_msearch`
   
   
   [[search-multi-search-api-desc]]
  
positive.code: [[search-multi-search-api-path-params]]
  ==== {api-path-parms-title}
  
  include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=index]
  +
  To search all indices, use `_all` or omit this parameter.
  
  [[search-multi-search-api-query-params]]
  ==== {api-query-parms-title}
  
negative.code: executes per node.  Defaults to `5`.
  
  You can use this parameter to prevent a request from overloading a cluster. For
  example, a default request hits all data streams and indices in a cluster. This
  could cause shard request rejections if the number of shards per node is high.
  
  In certain scenarios, parallelism isn't achieved through concurrent requests. In
  those cases, a low value in this  parameter could result in poor performance.
  