This configuration value sets a middle safety mark for STREAMS buffer-pool memory, between the low and (implicitly) normal operating levels for the STREAMS I/O subsystem on this host. The source MIB's own DESCRIPTION for this object is only the placeholder text "T B S" (to be supplied), so this reading is inferred from the object's name, its position in the STREAMS admin table (whose table-level DESCRIPTION says it holds "configuration information for a STREAMS subsystem"), and its Integer32 syntax; it lets the subsystem apply a less severe response than at the low-water mark while still warning that free memory is getting tight.