[Feature Request] Enable debug logging for Approximation framework

[harshavamsi]

Is your feature request related to a problem? Please describe

Similar to how we have debug logs in other optimization paths eg -

OpenSearch/server/src/main/java/org/opensearch/search/aggregations/bucket/filterrewrite/FilterRewriteOptimizationContext.java

Line 89 in 5fb4e69

logger.debug("Fast filter rewriteable: {} for shard {}", canOptimize, shardId);

.

We should enable debug logging for how the optimization works, how many docs per segment we are collecting. How many nodes of the point tree we are visiting, how many leaves we are reading etc. This should help us understand if/when there are regressions.

Describe the solution you'd like

• Enable debug logging
• Enable more logs by adding them to AbstractProfiler so that we can profile the results

Related component

Search:Performance

Describe alternatives you've considered

No response

Additional context

No response

[harshavamsi]

@prudhvigodithi

[Youngseo-Jeon0313]

Would it be okay if I tried contributing to this issue? ✋

[prudhvigodithi]

Thank you @Youngseo-Jeon0313, I have assigned this issue to you. Having this logging to Approximation framework would really help in debugging multiple aspects of the framework.

[SilasVM]

Hi @Youngseo-Jeon0313, I'm interested in this issue also. Are you still currently working on it?

[Youngseo-Jeon0313]

Sure! Go ahead