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**Modify a parameter in a parameter group**
The following ``modify-cluster-parameter-group`` example modifies the *wlm_json_configuration* parameter for workload management. It accepts the parameters from a file that contains the JSON contents shown below. ::
aws redshift modify-cluster-parameter-group \
--parameter-group-name myclusterparametergroup \
--parameters file://modify_pg.json
Contents of ``modify_pg.json``::
[
{
"ParameterName": "wlm_json_configuration",
"ParameterValue": "[{\"user_group\":\"example_user_group1\",\"query_group\": \"example_query_group1\", \"query_concurrency\":7},{\"query_concurrency\":5}]"
}
]
Output::
{
"ParameterGroupStatus": "Your parameter group has been updated but changes won't get applied until you reboot the associated Clusters.",
"ParameterGroupName": "myclusterparametergroup",
"ResponseMetadata": {
"RequestId": "09974cc0-64cd-11e2-bea9-49e0ce183f07"
}
}