opensearch-docs-cn/_monitoring-your-cluster/pa/rca/api.md

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layout	title	parent	grand_parent	nav_order	redirect_from
default	API	Root Cause Analysis	Performance Analyzer	1	/monitoring-plugins/pa/rca/api/

RCA API

Example request

# Request all available RCAs
GET localhost:9600/_plugins/_performanceanalyzer/rca

# Request a specific RCA
GET localhost:9600/_plugins/_performanceanalyzer/rca?name=HighHeapUsageClusterRca

Example response

{
  "HighHeapUsageClusterRca": [{
    "rca_name": "HighHeapUsageClusterRca",
    "state": "unhealthy",
    "timestamp": 1587426650942,
    "HotClusterSummary": [{
      "number_of_nodes": 2,
      "number_of_unhealthy_nodes": 1,
      "HotNodeSummary": [{
        "host_address": "192.168.144.2",
        "node_id": "JtlEoRowSI6iNpzpjlbp_Q",
        "HotResourceSummary": [{
          "resource_type": "old gen",
          "threshold": 0.65,
          "value": 0.81827232588145373,
          "avg": NaN,
          "max": NaN,
          "min": NaN,
          "unit_type": "heap usage in percentage",
          "time_period_seconds": 600,
          "TopConsumerSummary": [{
              "name": "CACHE_FIELDDATA_SIZE",
              "value": 590702564
            },
            {
              "name": "CACHE_REQUEST_SIZE",
              "value": 28375
            },
            {
              "name": "CACHE_QUERY_SIZE",
              "value": 12687
            }
          ],
        }]
      }]
    }]
  }]
}