Method: Elasticsearch::API::Indices::Actions#clear_cache

Defined in:
lib/elasticsearch/api/actions/indices/clear_cache.rb

#clear_cache(arguments = {}) ⇒ Object

Clear the cache. Clear the cache of one or more indices. For data streams, the API clears the caches of the stream’s backing indices. By default, the clear cache API clears all caches. To clear only specific caches, use the fielddata, query, or request parameters. To clear the cache only of specific fields, use the fields parameter.

Parameters:

  • arguments (Hash) (defaults to: {}) —

    a customizable set of options

Options Hash (arguments):

  • :index (String, Array) —

    Comma-separated list of data streams, indices, and aliases used to limit the request. Supports wildcards (‘*`). To target all data streams and indices, omit this parameter or use `*` or _all.

  • :allow_no_indices (Boolean) —

    If false, the request returns an error if any wildcard expression, index alias, or _all value targets only missing or closed indices. This behavior applies even if the request targets other open indices. Server default: true.

  • :expand_wildcards (String, Array<String>) —

    Type of index that wildcard patterns can match. If the request can target data streams, this argument determines whether wildcard expressions match hidden data streams. Supports comma-separated values, such as ‘open,hidden`. Server default: open.

  • :fielddata (Boolean) —

    If true, clears the fields cache. Use the fields parameter to clear the cache of specific fields only.

  • :fields (String, Array<String>) —

    Comma-separated list of field names used to limit the fielddata parameter.

  • :ignore_unavailable (Boolean) —

    If false, the request returns an error if it targets a missing or closed index.

  • :query (Boolean) —

    If true, clears the query cache.

  • :request (Boolean) —

    If true, clears the request cache.

  • :error_trace (Boolean) —

    When set to true Elasticsearch will include the full stack trace of errors when they occur.

  • :filter_path (String, Array<String>) —

    Comma-separated list of filters in dot notation which reduce the response returned by Elasticsearch.

  • :human (Boolean) —

    When set to true will return statistics in a format suitable for humans. For example ‘“exists_time”: “1h”` for humans and `“exists_time_in_millis”: 3600000` for computers. When disabled the human readable values will be omitted. This makes sense for responses being consumed only by machines.

  • :pretty (Boolean) —

    If set to true the returned JSON will be “pretty-formatted”. Only use this option for debugging only.

  • :headers (Hash) —

    Custom HTTP headers

See Also:



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# File 'lib/elasticsearch/api/actions/indices/clear_cache.rb', line 61

def clear_cache(arguments = {})
  request_opts = { endpoint: arguments[:endpoint] || 'indices.clear_cache' }

  defined_params = [:index].each_with_object({}) do |variable, set_variables|
    set_variables[variable] = arguments[variable] if arguments.key?(variable)
  end
  request_opts[:defined_params] = defined_params unless defined_params.empty?

  arguments = arguments.clone
  headers = arguments.delete(:headers) || {}

  body = nil

  _index = arguments.delete(:index)

  method = Elasticsearch::API::HTTP_POST
  path   = if _index
             "#{Utils.listify(_index)}/_cache/clear"
           else
             '_cache/clear'
           end
  params = Utils.process_params(arguments)

  Elasticsearch::API::Response.new(
    perform_request(method, path, params, body, headers, request_opts)
  )
end