How many CPU shares can be used by a SQL Statement in a High database service?

In a High database service, the allocation of CPU shares is typically designed to optimize performance for queries that demand significant resources. Each SQL statement executed within this service is granted a certain number of shares that determine the CPU resources it can utilize.

By convention, in many systems, a High database service is allocated 4 CPU shares for SQL statements. This ensures that while competing for CPU resources, those running high-priority tasks receive a sufficient amount to execute efficiently without being unduly impacted by lower-priority processes.

The allocation structure reflects the need to balance workload and performance, making 4 the optimal choice for a High database service in environments where query performance is critical. Thus, this answer aligns with standard configurations found in database management systems designed for high availability and resource management.