RU: The ability of resource control to limit large SQL is week

[AndreMouche]

Enhancement Task

The ability of resource control to limit large SQL is weak because RU consumption is deducted when the KV request returns, causing limitations on the resource usage of related SQL based on ru_per_sec to be ineffective when there are high concurrent KV requests or a single KV request consumes a large amount of RUs. From the RU(MAX) panel in the resource control panel, it can be seen that the maximum RU consumption of related resource groups frequently exceeds ru_per_sec, indicating that large SQL queries are not effectively restricted.