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layout	title	parent	nav_order	redirect_from
default	Settings	Piped processing language	3	/docs/ppl/settings/

Settings

The PPL plugin adds a few settings to the standard OpenSearch cluster settings. Most are dynamic, so you can change the default behavior of the plugin without restarting your cluster.

You can update these settings like any other cluster setting:

PUT _cluster/settings
{
  "transient": {
    "opensearch": {
      "ppl": {
        "enabled": "false"
      }
    }
  }
}

Requests to _opensearch/_ppl include index names in the request body, so they have the same access policy considerations as the bulk, mget, and msearch operations. If you set the rest.action.multi.allow_explicit_index parameter to false, the PPL plugin is disabled.

You can specify the settings shown in the following table:

Setting	Description	Default
`opensearch.ppl.enabled`	Change to `false` to disable the plugin.	True
`opensearch.ppl.query.memory_limit`	Set heap memory usage limit. If a query crosses this limit, it's terminated.	85%
`opensearch.query.size_limit`	Set the maximum number of results that you want to see. This impacts the accuracy of aggregation operations. For example, if you have 1000 documents in an index, by default, only 200 documents are extracted from the index for aggregation.	200

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Settings

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