我们有几台运行VMWare ESXi 4的服务器，其中运行OpenSUSE和Windows 2008r2的虚拟机。 我们也有一个使用OpenNMS监视这些虚拟机的服务器。 对于几个OpenSUSE虚拟机，我们得到了常规的高门槛消息的丢弃数据包的百分比。
检查图表显示，它只是被丢弃的传入包。 丢弃率高达10％。 它不会发生在所有的Linux虚拟机上。 那些没有发生的是运行一个稍旧的OpenSUSE 11.3，而其他的是11.4或12.1但是，这也是真的，遭受这个问题的负载很less，而最重的加载虚拟机零丢包去年。
Windows 2008服务器似乎没有这个问题。
那么这可能是什么原因呢？ 我应该开始担心什么比例？
编辑：我想知道如果snmp或opennms显示不正确的数据。 当我看netstat -s的输出时，我看到：丢弃了0个input数据包
这是完整的输出（正常运行时间为137天）：
Ip: 89907150 total packets received 5047 with invalid addresses 0 forwarded 19748 with unknown protocol 0 incoming packets discarded 89882355 incoming packets delivered 93223508 requests sent out 133 dropped because of missing route Icmp: 4121 ICMP messages received 37 input ICMP message failed. ICMP input histogram: destination unreachable: 162 echo requests: 3950 timestamp request: 9 24159 ICMP messages sent 0 ICMP messages failed ICMP output histogram: destination unreachable: 20200 echo replies: 3950 timestamp replies: 9 IcmpMsg: InType3: 162 InType8: 3950 InType13: 9 OutType0: 3950 OutType3: 20200 OutType14: 9 Tcp: 309309 active connections openings 175665 passive connection openings 582 failed connection attempts 19123 connection resets received 27 connections established 89397500 segments received 98178773 segments send out 39585 segments retransmited 7 bad segments received. 256696 resets sent Udp: 448836 packets received 524 packets to unknown port received. 0 packet receive errors 448854 packets sent RcvbufErrors: 0 SndbufErrors: 0 UdpLite: InDatagrams: 0 NoPorts: 0 InErrors: 0 OutDatagrams: 0 RcvbufErrors: 0 SndbufErrors: 0 TcpExt: 1897 invalid SYN cookies received 441 resets received for embryonic SYN_RECV sockets ArpFilter: 0 125024 TCP sockets finished time wait in fast timer 123 packets rejects in established connections because of timestamp 2365891 delayed acks sent 5221 delayed acks further delayed because of locked socket Quick ack mode was activated 1517 times 76762 packets directly queued to recvmsg prequeue. 32782 packets directly received from backlog 148216 packets directly received from prequeue 81827955 packets header predicted 11453 packets header predicted and directly queued to user TCPPureAcks: 2002864 TCPHPAcks: 81030906 TCPRenoRecovery: 3 TCPSackRecovery: 5098 TCPSACKReneging: 46 TCPFACKReorder: 31 TCPSACKReorder: 17 TCPRenoReorder: 0 TCPTSReorder: 25 TCPFullUndo: 31 TCPPartialUndo: 599 TCPDSACKUndo: 1712 TCPLossUndo: 691 TCPLoss: 5407 TCPLostRetransmit: 201 TCPRenoFailures: 0 TCPSackFailures: 286 TCPLossFailures: 101 TCPFastRetrans: 11936 TCPForwardRetrans: 493 TCPSlowStartRetrans: 3237 TCPTimeouts: 15424 TCPRenoRecoveryFail: 0 TCPSackRecoveryFail: 165 TCPSchedulerFailed: 0 TCPRcvCollapsed: 0 TCPDSACKOldSent: 1569 TCPDSACKOfoSent: 5 TCPDSACKRecv: 7543 TCPDSACKOfoRecv: 6 TCPAbortOnSyn: 0 TCPAbortOnData: 249150 TCPAbortOnClose: 1391 TCPAbortOnMemory: 0 TCPAbortOnTimeout: 160 TCPAbortOnLinger: 0 TCPAbortFailed: 0 TCPMemoryPressures: 0 TCPSACKDiscard: 15 TCPDSACKIgnoredOld: 2257 TCPDSACKIgnoredNoUndo: 739 TCPSpuriousRTOs: 129 TCPMD5NotFound: 0 TCPMD5Unexpected: 0 TCPSackShifted: 38802 TCPSackMerged: 24929 TCPSackShiftFallback: 16027 TCPBacklogDrop: 0 TCPMinTTLDrop: 0 TCPDeferAcceptDrop: 87963 IPReversePathFilter: 0 TCPTimeWaitOverflow: 0 IpExt: InNoRoutes: 0 InTruncatedPkts: 0 InMcastPkts: 2 OutMcastPkts: 0 InBcastPkts: 31370 OutBcastPkts: 0 InOctets: 17194554126 OutOctets: 21418612641 InMcastOctets: 72 OutMcastOctets: 0 InBcastOctets: 3492814 OutBcastOctets: 0