Storage size doubled after Update By Query


Mi index has 17Gb of storage size

But where I executed (2 times !) the "update by query" querey to copy a field in an other one the size is increased :
The Docs count doesnt change.


POST jp_data_stk_mouv/_update_by_query?conflicts=proceed&refresh=true

"query" : {

"match_all" : {}

"script" : "ctx._source.ma_date = ctx._source.DATE_STAT;"

My index pattern (for this index) has it s data duplicated when I perform some metrics.

Any idea why I get this please?

Did you run a force merge on the index? Force merge API | Elasticsearch Guide [7.17] | Elastic

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