1 document indexing timeout! help me

Hello, I am currently indexing 1 document in opensearch to use upsert api.
The request volume is approximately 3 requests per second.
However, timeouts occur intermittently.
The timeout setting time is 3 seconds.
There isn’t much traffic, why is that?
There are no problems on the metrix either.

I wonder what’s happening with your thread pool. Updates force refreshes. So maybe refreshes take too long. You can monitor refresh count, time and the refresh thread pool to see what’s going on.

If you don’t already do that, let me suggest our OpenSearch Monitoring :slightly_smiling_face: