Bucket setting question

Question about Bucket Priority

Assuming there are 5 buckets:

  1. When the priority of 1 bucket is set to High, how much does the performance of the High priority bucket increase, and how much does the performance of the remaining 4 buckets decrease?
  2. When the priority of 2 buckets is set to High, how much does the performance of the High priority buckets increase, and how much does the performance of the remaining 3 buckets decrease?

I am curious about the above details.

The settings are for background tasks only. So it’s not like setting one bucket to “High” would result in a 50% decrease in response time for that bucket and a 12.5% increase for the other four buckets. It’s only the background processing that is effected. Create a Bucket | Couchbase Docs

I don’t know how one would quantify “performance” of a bucket.

There are too many variables in usage of buckets (number of documents, size of documents, request rate, type of requests, resident ratio, networking, memory, cpu, number of clients) to generalize “performance”.

I suspect the only way to get an answer for your specific implementation would be to conduct experiments.

For example, what kinds of background processing are there?

indexing, replication, rebalancing - I’m sure there are others.

Does changing the bucket settings affect not only the Data Service but also the Index Service Node?