nstat
nstat 的一个特点是，如果不加参数，它每次运行时输出的数值，是从上一次被执行以来这些计数器的变化值。这就带来了一个挺明显的优势：我们不用像使用 netstat 那样，在两次输出值中找出变化量了，nstat 输出的直接就是变化量。
$ nstat
#kernel
IpInReceives 4956420 0.0
IpInAddrErrors 7 0.0
IpForwDatagrams 183207 0.0
IpInDelivers 4773103 0.0
IpOutRequests 4634080 0.0
IpOutDiscards 8 0.0
IcmpInMsgs 8890 0.0
IcmpInErrors 16 0.0
IcmpInDestUnreachs 875 0.0
IcmpInTimeExcds 46 0.0
IcmpInEchos 7843 0.0
IcmpInEchoReps 126 0.0
IcmpOutMsgs 8213 0.0
IcmpOutDestUnreachs 29 0.0
IcmpOutEchos 341 0.0
IcmpOutEchoReps 7843 0.0
IcmpMsgInType0 126 0.0
IcmpMsgInType3 875 0.0
IcmpMsgInType8 7843 0.0
IcmpMsgInType11 46 0.0
IcmpMsgOutType0 7843 0.0
IcmpMsgOutType3 29 0.0
IcmpMsgOutType8 341 0.0
TcpActiveOpens 35762 0.0
TcpPassiveOpens 104837 0.0
TcpAttemptFails 943782 0.0
TcpEstabResets 163 0.0
TcpInSegs 4676768 0.0
TcpOutSegs 3483348 0.0
TcpRetransSegs 34750 0.0
TcpInErrs 9 0.0
TcpOutRsts 954310 0.0
TcpInCsumErrors 8 0.0
UdpInDatagrams 87421 0.0
UdpNoPorts 23 0.0
UdpOutDatagrams 88139 0.0
Ip6OutRequests 476 0.0
Ip6OutDiscards 1 0.0
Ip6OutNoRoutes 391 0.0
Ip6OutMcastPkts 476 0.0
Ip6OutOctets 30104 0.0
Ip6OutMcastOctets 30104 0.0
Icmp6OutMsgs 474 0.0
Icmp6OutRouterSolicits 333 0.0
Icmp6OutNeighborSolicits 22 0.0
Icmp6OutMLDv2Reports 119 0.0
Icmp6OutType133 333 0.0
Icmp6OutType135 22 0.0
Icmp6OutType143 119 0.0
TcpExtSyncookiesSent 2295 0.0
TcpExtSyncookiesRecv 2230 0.0
TcpExtSyncookiesFailed 1 0.0
TcpExtEmbryonicRsts 943641 0.0
TcpExtOutOfWindowIcmps 4 0.0
TcpExtLockDroppedIcmps 3 0.0
TcpExtTW 21112 0.0
TcpExtTWRecycled 1 0.0
TcpExtPAWSEstab 1 0.0
TcpExtDelayedACKs 12909 0.0
TcpExtDelayedACKLocked 8 0.0
TcpExtDelayedACKLost 3456 0.0
TcpExtTCPHPHits 497002 0.0
TcpExtTCPPureAcks 306926 0.0
TcpExtTCPHPAcks 282323 0.0
TcpExtTCPSackRecovery 3124 0.0
TcpExtTCPSACKReorder 580 0.0
TcpExtTCPRenoReorder 11 0.0
TcpExtTCPTSReorder 40 0.0
TcpExtTCPFullUndo 1 0.0
TcpExtTCPPartialUndo 8 0.0
TcpExtTCPDSACKUndo 36 0.0
TcpExtTCPLossUndo 39 0.0
TcpExtTCPLostRetransmit 7188 0.0
TcpExtTCPSackFailures 28 0.0
TcpExtTCPLossFailures 23 0.0
TcpExtTCPFastRetrans 9742 0.0
TcpExtTCPSlowStartRetrans 1839 0.0
TcpExtTCPTimeouts 13224 0.0
TcpExtTCPLossProbes 13141 0.0
TcpExtTCPLossProbeRecovery 2226 0.0
TcpExtTCPSackRecoveryFail 506 0.0
TcpExtTCPBacklogCoalesce 5700 0.0
TcpExtTCPDSACKOldSent 3452 0.0
TcpExtTCPDSACKOfoSent 1 0.0
TcpExtTCPDSACKRecv 553 0.0
TcpExtTCPDSACKOfoRecv 5 0.0
TcpExtTCPAbortOnData 133 0.0
TcpExtTCPAbortOnClose 110 0.0
TcpExtTCPAbortOnTimeout 269 0.0
TcpExtTCPDSACKIgnoredNoUndo 207 0.0
TcpExtTCPSpuriousRTOs 1 0.0
TcpExtTCPSackShifted 40 0.0
TcpExtTCPSackMerged 903 0.0
TcpExtTCPSackShiftFallback 3948 0.0
TcpExtIPReversePathFilter 2 0.0
TcpExtTCPTimeWaitOverflow 2840 0.0
TcpExtTCPReqQFullDoCookies 2295 0.0
TcpExtTCPRcvCoalesce 357930 0.0
TcpExtTCPOFOQueue 212349 0.0
TcpExtTCPOFOMerge 28 0.0
TcpExtTCPChallengeACK 43 0.0
TcpExtTCPSYNChallenge 30 0.0
TcpExtTCPAutoCorking 4370 0.0
TcpExtTCPFromZeroWindowAdv 3 0.0
TcpExtTCPToZeroWindowAdv 3 0.0
TcpExtTCPWantZeroWindowAdv 18 0.0
TcpExtTCPSynRetrans 1850 0.0
TcpExtTCPOrigDataSent 741787 0.0
TcpExtTCPHystartTrainDetect 20 0.0
TcpExtTCPHystartTrainCwnd 1205 0.0
TcpExtTCPHystartDelayDetect 8 0.0
TcpExtTCPHystartDelayCwnd 937 0.0
TcpExtTCPACKSkippedChallenge 2 0.0
TcpExtTCPKeepAlive 98 0.0
TcpExtTCPDelivered 775422 0.0
TcpExtTCPAckCompressed 126859 0.0
TcpExtTcpTimeoutRehash 11383 0.0
TcpExtTcpDuplicateDataRehash 104 0.0
TcpExtTCPDSACKRecvSegs 554 0.0
TcpExtTCPDSACKIgnoredDubious 4 0.0
IpExtOutMcastPkts 2 0.0
IpExtInOctets 9897698290 0.0
IpExtOutOctets 8224647876 0.0
IpExtOutMcastOctets 80 0.0
IpExtInNoECTPkts 5866317 0.0
IpExtInECT0Pkts 2 0.0
查看全部值
$ nstat -a
$ nstat --json