Query Insights Plugin: Data Storage

[simonsolts-bark]

Hi there, I'm hoping someone can help me understand the configuration of the Query Insights plugin and associated dashboards.
My usecase is an (AWS Managed) OpenSearch 3.1 cluster; storing documents with certain attributes.
Part of the customer journey involves them setting some filters in a search UI, our backend turns this into an OpenSearch query and ranks and retrieves the documents from the cluster.

Where is the data stored for the top-n query insights?

• I have set up Query Insights and it is working as expected
• Data retention is turned on and the "exporter" is set to "Local Index"
• ➡️ What is the "Local Index"? Where is it located?

Grouping

• I would like to group the queries, so that I can visualise whether certain searches are taking longer than expected on the cluster
• I tried to use the "Group by" configuration, but the only option is "similarity" -- this is not appropriate for my usecase
• I would like to be able to group / visualise the query latency by properties I define on the query
• For example, I have added some stats keywords to the query, these would be ideal

➡️ Is there a way to achieve my usecase? Is query insights the right tool for this?
Thank you in advance for anyone who might be able to help 😄