Who know what is difference between both values and when counters are increment.
show interface gig0/1
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/26/0 (size/max/drops/flushes); Total output drops: 151329
Queueing strategy: Class-based queueing
Output queue: 0/1000/0 (size/max total/drops)
I read most documentations and troubleshootings (for example "In/Out queue drop", "buffer tuning") but there is poorly description.