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Cause for no-buffer drops

Can somebody help me understand the cause for no-buffer drops counters to be increasing. I have tried increasing the queue limit on standard class, Even after that i see the drops to be increasing.

Truncated show policy ouput

    Class-map: class-default (match-any)
      2112140666 packets, 1082668864156 bytes
      30 second offered rate 3110000 bps, drop rate 0 bps
      Match: any
      Queueing
      queue limit 64 packets
      (queue depth/total drops/no-buffer drops) 0/104474/104474
      (pkts output/bytes output) 2112036381/1082551524665
      shape (average) cir 35000000, bc 140000, be 140000
      target shape rate 35000000


        Class-map: Standard (match-any)
          2111666112 packets, 1082448669869 bytes
          30 second offered rate 3104000 bps, drop rate 0 bps
          Match: access-group name WSA_Standard
            2111665991 packets, 1082448579012 bytes
            30 second rate 3104000 bps
          Queueing
          queue limit 4096 packets
          (queue depth/total drops/no-buffer drops) 0/104460/104460
          (pkts output/bytes output) 2111561673/1082322614790
          bandwidth 34600 kbps
            Exp-weight-constant: 10 (1/1024)
            Mean queue depth: 0 packets
            dscp     Transmitted       Random drop      Tail drop          Minimum        Maximum     Mark
                      pkts/bytes     pkts/bytes       pkts/bytes          thresh         thresh     prob

            af11   4137605606/2129612615013      0/0              0/0               1366          4096  1/1
            af12         105/145341          0/0              0/0                820          2732  1/1
            af13           0/0               0/0              0/0                410          1366  1/1
          police:
              cir 34650000 bps, bc 4331250 bytes, be 6496875 bytes
            conformed 2111666135 packets, 1082455326100 bytes; actions:
              set-dscp-transmit af11
            exceeded 0 packets, 0 bytes; actions:
              set-dscp-transmit af12
            violated 0 packets, 0 bytes; actions:
              set-dscp-transmit af13
            conformed 3104000 bps, exceed 0 bps, violate 0 bps

Configuration

policy-map Standard_35M
class Management
    bandwidth 350
    police 350000 43750 65625 conform-action set-dscp-transmit 48 exceed-action set-dscp-transmit 48 violate-action set-dscp-transmit 48
class Standard
    bandwidth 34600
     random-detect dscp-based
     random-detect exponential-weighting-constant 10
     random-detect dscp 10 1366 4096 1
     random-detect dscp 12 820 2732 1
     random-detect dscp 14 410 1366 1
    police 34650000 4331250 6496875 conform-action set-dscp-transmit 10 exceed-action set-dscp-transmit 12 violate-action set-dscp-transmit 14
    queue-limit 4096 packets

policy-map Standard_Limit_35M
class class-default
    shape average 35000000
  service-policy Standard_35M

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