Return an instantaneous snapshot of the execution batch size (see []Execution Batch Size)) of the queue associated with the specified id, or -1 if id is not a valid queue id. When a thread is selecting jobs for processing, if fewer than batchSize jobs are available then only the available jobs will be processed in the current batch.
Declared in <bdlmt_multiqueuethreadpool.h>
int
batchSize(int id) const;