[Solved] What will happen if you run this command?POST /_cache/clear { "query": true } - Ans: Clear query cache for all indices | Elasticsearch

Elasticsearch - Performance and Scaling

What will happen if you run this command?

POST /_cache/clear { "query": true }

AReturn an error because index is missing

BClear request cache for all indices

CClear query cache for all indices

DClear fielddata cache for all indices

Step-by-Step Solution

Solution:

Step 1: Understand the endpoint and body
The endpoint /_cache/clear without index clears caches cluster-wide. The body { "query": true } clears query cache.
Step 2: Confirm behavior for missing index
When no index is specified, cache clear applies to all indices, no error occurs.
Final Answer:
Clear query cache for all indices -> Option C
Quick Check:
/_cache/clear with query:true clears query cache cluster-wide [OK]

Quick Trick: No index means clear cache for all indices [OK]

Common Mistakes:

MISTAKES

Master "Performance and Scaling" in Elasticsearch

9 interactive learning modes - each teaches the same concept differently

More Elasticsearch Quizzes

What will happen if you run this command?