Use the monWorkQueue monitoring table to determine an appropriate size for syb_blocking_pool.
Reduce the size of the pool if the WaitCount and WaitTime are zero.
sp_sysmon displays blocking pool statistics in the “Kernel” section of its output. You may need to increase the pool size if the “Blocking Call Activity” section shows a high percentage for “Queued Requests” relative to “Serviced Requests” or high “Total Wait Time.”