Elasticsearch - Document Operations
Why does the _delete_by_query API sometimes take longer to complete than deleting documents by ID?
Why does the _delete_by_query API sometimes take longer to complete than deleting documents by ID?
hard🧠 Conceptual Q10 of 15
Step-by-Step Solution
Solution:
Step 1: Understand _delete_by_query process
This API must search the index to find all documents matching the query before deleting them.Step 2: Compare with delete by ID
Deleting by ID targets a single document directly, so it is faster than searching and deleting many.Final Answer:
Because it searches and deletes all matching documents, which can be many -> Option BQuick Check:
_delete_by_query is slower due to searching many docs [OK]
Quick Trick: _delete_by_query searches before deleting, so slower [OK]
Common Mistakes:
MISTAKES- Thinking it deletes only one document
- Believing it creates documents before deleting
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