The term filter that is used:

curl -XGET 'http://localhost:9200/my-index/my-doc-type/_search' -d '{
    "filter": {
       "term": {"void": false}
    }, 
    "fields": [["user_id1", "user_name", "date", "status", "q1", 
          "q1_unique_code", "q2", "q3"]],
     "size": 50000, "sort": ["date_value"]}'


   - The 'void' field is a boolean field.
   - The index store size is 504mb.
   - The elastic search setup consists of only a single node and the index 
   consists of only a single shard and 0 replicas. The version of 
   elasticsearch is 0.90.7
   - The fields mentioned above is only the first 8 fields. The actual term 
   filter that we execute has 350 fields mentioned.

*We noticed the memory spiking by about 2-3gb though the store size is only 
504mb.*

*Running the query multiple times seems to continuously increase the 
memory.*

Could someone explain why this memory spike occurs?

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