NewMockGPool is only for test.

NewShardPoolMap creates a shard pool map.

CheckTable is for admin check table component.

DDL is for ddl component.

DistTask is for disttask component.

ImportInto is for import into component.

UNKNOWN is for unknown component.

MaxOverclockCount is the maximum number of overclock goroutine.

MinSchedulerInterval is the minimum interval between two scheduling.

MockGPool is only for test.

PoolContainer is a pool container.

ShardPoolMap is a map with shard.

GoroutinePool is a pool interface.

Component is ID for difference component.