Aggregation is too slow

Elastic Stack Elasticsearch
1

Hi sir,

i'm new to elasticsearch, i have more than 2.5 crores of data in elasticsearch index on a single node cluster, when i perform aggregation query it takes lot of time and even get timeout. i think i'm doing something wrong here, please help me.

ES INFO:
nodes: 1,
primary-shards: 30,
replica-shards: 30,
total index size: 90gb,
each shards holding 3gb of data,

SYSTEM INFO:
250 SSD ram 28GB

2

What type of aggregation are you running?

3

terms

4

Can you show an example?

5

MY MODEL QUERY:

FIRST I PERFORM A SIMPLE TEXT SEARCH AND THEN I PERFORM AGGREGATION TO FIND WHICH AUTHOR NAME OCCURUS MOST FREQUENTLY FROM THE RETURNED DOCUMENT

        {  
   "query":{  
      "simple_query_string":{  
         "query":"search text"
      }
   },
   "aggs":{  
      "most_frequent_authors":{  
         "terms":{  
            "field":"AuthorList.Name.keyword"
         }
      }
   }
}
6

MY MODEl MAPPING:

 {  
           "Abstract":{  
              "type":"text",
              "fields":{  
                 "keyword":{  
                    "type":"keyword",
                    "ignore_above":256
                 }
              }
           },
           "ArticleTitle":{  
              "type":"text",
              "fields":{  
                 "keyword":{  
                    "type":"keyword",
                    "ignore_above":256
                 }
              }
           },
           "AuthorList":{  
              "properties":{  
                        "Name":{  
                          "type":"text",
                          "fields":{  
                             "keyword":{  
                                "type":"keyword",
                                "ignore_above":256
                             }
                    }
                 }
              }
           }
        }
7

Is there anything in the logs, e.g. around long or frequent GC? How large heap do you have configured? How does CPU and disk I/O look like when you are querying?

8

heap size 12gb