[Solved] You have this Elasticsearch setting in your config: index.refresh_interval: 1s But your indexing speed is slow. What is the best fix? | Elasticsearch

Elasticsearch - Performance and Scaling

You have this Elasticsearch setting in your config:

index.refresh_interval: 1s

But your indexing speed is slow. What is the best fix?

AIncrease <code>index.number_of_replicas</code> to 2 for faster writes.

BChange <code>index.refresh_interval</code> to <code>-1</code> during bulk indexing.

CSet <code>index.refresh_interval</code> to <code>0</code> to refresh immediately.

DDelete old indices to free space.

Step-by-Step Solution

Solution:

Step 1: Understand refresh interval impact
Frequent refreshes slow indexing because Elasticsearch makes data searchable often.
Step 2: Apply best practice for bulk indexing
Setting refresh_interval to -1 disables automatic refresh, speeding bulk indexing.
Final Answer:
Change index.refresh_interval to -1 during bulk indexing. -> Option B
Quick Check:
Disable refresh during bulk = faster indexing [OK]

Quick Trick: Disable refresh during bulk indexing for speed [OK]

Common Mistakes:

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