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The clear_cache API doesn't clear fielddata cache by default #2886

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clintongormley opened this Issue Apr 12, 2013 · 0 comments

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clintongormley commented Apr 12, 2013

In 0.90.RC3, a call to clear the cache without specifying any options doesn't clear the fielddata cache, but it does in v0.20.6:

curl -XPUT 'http://127.0.0.1:9200/test/?pretty=1'  -d '
{
   "settings" : {
      "number_of_shards" : 1
   }
}
'

curl -XPOST 'http://127.0.0.1:9200/test/test/_bulk?pretty=1'  -d '
{"index" : {}}
{"num" : 1}
{"index" : {}}
{"num" : 2}
{"index" : {}}
{"num" : 3}
{"index" : {}}
{"num" : 4}
{"index" : {}}
{"num" : 5}
{"index" : {}}
{"num" : 6}
{"index" : {}}
{"num" : 7}
{"index" : {}}
{"num" : 8}
{"index" : {}}
{"num" : 9}
{"index" : {}}
{"num" : 10}
{"index" : {}}
{"num" : 11}
{"index" : {}}
{"num" : 12}
{"index" : {}}
{"num" : 13}
{"index" : {}}
{"num" : 14}
{"index" : {}}
{"num" : 15}
{"index" : {}}
{"num" : 16}
{"index" : {}}
{"num" : 17}
{"index" : {}}
{"num" : 18}
{"index" : {}}
{"num" : 19}
{"index" : {}}
{"num" : 20}
{"index" : {}}
{"num" : 21}
{"index" : {}}
{"num" : 22}
{"index" : {}}
{"num" : 23}
{"index" : {}}
{"num" : 24}
{"index" : {}}
{"num" : 25}
{"index" : {}}
{"num" : 26}
{"index" : {}}
{"num" : 27}
{"index" : {}}
{"num" : 28}
{"index" : {}}
{"num" : 29}
{"index" : {}}
{"num" : 30}
{"index" : {}}
{"num" : 31}
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{"num" : 32}
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{"index" : {}}
{"num" : 90}
{"index" : {}}
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{"index" : {}}
{"num" : 98}
{"index" : {}}
{"num" : 99}
{"index" : {}}
{"num" : 100}
'

curl -XGET 'http://127.0.0.1:9200/test/test/_search?pretty=1'  -d '
{
   "facets" : {
      "foo" : {
         "terms" : {
            "field" : "num"
         }
      }
   },
   "size" : 0
}
'

In 0.90.RC3, a clear cache request without params:

curl -XPOST 'http://127.0.0.1:9200/_cache/clear?pretty=1' 

The fielddata is not cleared:

curl -XGET 'http://127.0.0.1:9200/_cluster/nodes/stats?pretty=1&clear=true&indices=true' 

#             "fielddata" : {
#                "evictions" : 0,
#                "memory_size_in_bytes" : 120,
#                "memory_size" : "120b"
#             },

It is cleared when specifying field_data:

curl -XPOST 'http://127.0.0.1:9200/_cache/clear?field_data=true&pretty=1' 

curl -XGET 'http://127.0.0.1:9200/_cluster/nodes/stats?pretty=1&clear=true&indices=true' 

#             "fielddata" : {
#                "evictions" : 0,
#                "memory_size_in_bytes" : 0,
#                "memory_size" : "0b"
#             },

In 0.20.6, it is cleared even though field_data is not specified:

#             "cache" : {
#                "id_cache_size_in_bytes" : 0,
#                "field_evictions" : 0,
#                "field_size_in_bytes" : 0,
#                "id_cache_size" : "0b",
#                "field_size" : "0b",
#                "filter_count" : 0,
#                "filter_size" : "40b",
#                "bloom_size" : "0b",
#                "bloom_size_in_bytes" : 0,
#                "filter_size_in_bytes" : 40,
#                "filter_evictions" : 0
#             }

The docs http://www.elasticsearch.org/guide/reference/api/admin-indices-clearcache/ say "The clear cache API allows to clear either all caches..."

@martijnvg martijnvg closed this in 5c90e5f Apr 12, 2013

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