# Elasticsearch courier fetch error **URL:** \ **Category:** Elasticsearch\ **Created:** [November 24, 2015, 5:16am UTC](https://discuss.elastic.co/t/elasticsearch-courier-fetch-error/35378 "2015-11-24T05:16:41Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![colormegood](https://avatars.discourse-cdn.com/v4/letter/c/aeb1de/32.png) [@colormegood](https://discuss.elastic.co/u/colormegood)\ **Post date:** [November 24, 2015, 5:16am UTC](https://discuss.elastic.co/t/elasticsearch-courier-fetch-error/35378/1 "2015-11-24T05:16:41Z")
I found elasticsearch courier fetch error. error log is below. [FIELDDATA] Data too large, data for [@timestamp] would be larger than limit of [5,133,041,664 / 4.7gb] Would you tell me how to fix it? ---
**Author:** ![warkolm](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/warkolm/32/39224_2.png) [@warkolm](https://discuss.elastic.co/u/warkolm)\ **Post date:** [November 24, 2015, 7:06am UTC](https://discuss.elastic.co/t/elasticsearch-courier-fetch-error/35378/2 "2015-11-24T07:06:03Z")
Increase your heap size. Use docs values. Query a smaller subset of data. Any of those will help. ---
**Author:** ![magnusbaeck](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/magnusbaeck/32/44943_2.png) [@magnusbaeck](https://discuss.elastic.co/u/magnusbaeck)\ **Post date:** [November 25, 2015, 6:49am UTC](https://discuss.elastic.co/t/elasticsearch-courier-fetch-error/35378/3 "2015-11-25T06:49:59Z")
Limiting the [fielddata cache size](https://www.elastic.co/guide/en/elasticsearch/guide/current/_limiting_memory_usage.html#fielddata-size) would also help. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [July 5, 2017, 11:36pm UTC](https://discuss.elastic.co/t/elasticsearch-courier-fetch-error/35378/4 "2017-07-05T23:36:05Z")