src\include\catalog\pg_resgroup.h：
typedef enum ResGroupLimitType
{
	RESGROUP_LIMIT_TYPE_UNKNOWN = 0,

	RESGROUP_LIMIT_TYPE_CONCURRENCY,
	RESGROUP_LIMIT_TYPE_CPU,
	RESGROUP_LIMIT_TYPE_MEMORY,
	RESGROUP_LIMIT_TYPE_MEMORY_SHARED_QUOTA,
	RESGROUP_LIMIT_TYPE_MEMORY_SPILL_RATIO,
	RESGROUP_LIMIT_TYPE_MEMORY_AUDITOR,
	RESGROUP_LIMIT_TYPE_CPUSET,

	RESGROUP_LIMIT_TYPE_COUNT,
} ResGroupLimitType;