The following counters pertain to SMS Software Inventory Processor.
There are two types of SINV records: software inventory complete (.sic) files and software inventory delta (.sid) files. When .sic files are enqueued, Software Inventory Processor is not aware of the count of waiting .sid files. Therefore, .sid files are not included in this count.
Because this count is the count at the time the queue was scanned, if many SINV records are being written to the input queue, this count can lag behind the actual number waiting to be processed.