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Motivation

I am not clear why we set the hikari thread pool size, I don't find out any benchmark test result.

Following https://github.com/brettwooldridge/HikariCP/wiki/About-Pool-Sizing, I hope to remove some configurations of hikari, the default setting is great enough. We shouldn't change the default setting unless we have benchmark evidence.

Design Detail

Only keep the pool name and connection-test-query
hikari:
connection-test-query: select 1
pool-name: DolphinScheduler

Compatibility, Deprecation, and Migration Plan

Compatible with all version.

Test Plan

Test by e2e.

Code of Conduct

• I agree to follow this project's Code of Conduct