[c-nsp] the result "show int counters errors"

[Monty Ree]

Hello, list.

I have some questions about the result of "show int  counters errors".

my 6509 is WS-SUP720-3B and WS-X6724-SFP(+WS-F6700-DFC3B)
and port-channeling with another 6509.
  
the traffic is about 700Mbps per port and there is no problem and no logs.
But when I execute like below, I can see lots of  OutDiscards counters.
and the counters are increasing slowly.

according to this 
site(http://www.cisco.com/warp/public/473/53.shtml#Out-Discard)
it means buffer size related problem, rihgt?
But pps would not be problem because DFC card is together with 
WS-X6724-SFP, then bps?
But the traffic is just 700M bps...

What's the problem and how can I solve this problem?

sup720>show int  counters errors
 
Port        Align-Err    FCS-Err   Xmit-Err    Rcv-Err UnderSize 
OutDiscards
Gi3/1               0          0          0          0         0       
12376
Gi3/2               0          0          0          0         0       
12377
Gi3/3               0          0          0          0         0        
4443
Gi3/4               0          0          0          0         0       
12334
Gi3/5               0          0          0          0         0        
4491
Gi3/6               0          0          0          0         0        
2023
...............


Thsnks for your help in advance.

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