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Full Discussion: Too much TCP retransmitted and TCP duplicate on server Oracle Solaris 10
Operating Systems Solaris Too much TCP retransmitted and TCP duplicate on server Oracle Solaris 10 Post 302896931 by insatiable1610 on Thursday 10th of April 2014 04:02:19 AM
Old 04-10-2014
Too much TCP retransmitted and TCP duplicate on server Oracle Solaris 10
I have problem with oracle solaris 10 running on oracle sparc T4-2 server.
Os information: 5.10 Generic_150400-03 sun4v sparc sun4v
Output from tcpstat.d script
Code:
  TCP bytes:     out   outRetrans           in        inDup    inUnorder
             6833763         7300        98884            0            0
             1974525          864        63993            0            0
             1975044            0        44712            0            0
             2601126          120        50980            0            0
             4812048           39        95983            0            0
             4150302          547        74640           14            0
              916926            0        46583           32            0
             3254534            0       344162            0            0
             7634514          175        92269            0            0
             1470737            0        56622            0            0
             3302183          280        91304            0            0
             2285685          144        65818            0            0
             4516005           63       104704            0            0
             5492292            0       104575            0            0
             2940265          864       152483            0            0
             5144902            0       124908            0            0
             2496748            0        88227            0            0
             1713836            0       116517           65            0
             2692040          136        95233            0            0
             3256049          136       118073            0            0

Snoop information on server: Please see attach picture.
netstat -sP tcp information
Code:
TCP     tcpRtoAlgorithm     =     4     tcpRtoMin           =   400
        tcpRtoMax           = 60000     tcpMaxConn          =    -1
        tcpActiveOpens      =183824     tcpPassiveOpens     =184227
        tcpAttemptFails     =  2110     tcpEstabResets      = 73884
        tcpCurrEstab        =   325     tcpOutSegs          =6413525798
        tcpOutDataSegs      =210063122  tcpOutDataBytes     =3129665400
        tcpRetransSegs      =7724022    tcpRetransBytes     =611738266
        tcpOutAck           =1685731391 tcpOutAckDelayed    =263533955
        tcpOutUrg           = 12625     tcpOutWinUpdate     =  6951
        tcpOutWinProbe      =  5267     tcpOutControl       =754008
        tcpOutRsts          = 24425     tcpOutFastRetrans   =  5287
        tcpInSegs           =4836233979
        tcpInAckSegs        =296120770  tcpInAckBytes       =1389371405
        tcpInDupAck         =15641972   tcpInAckUnsent      =   474
        tcpInInorderSegs    =2044378119 tcpInInorderBytes   =2246362655
        tcpInUnorderSegs    =146886     tcpInUnorderBytes   =66009739
        tcpInDupSegs        =1384221    tcpInDupBytes       =128124335
        tcpInPartDupSegs    =   708     tcpInPartDupBytes   =136252
        tcpInPastWinSegs    =  5873     tcpInPastWinBytes   =3770680883
        tcpInWinProbe       =   170     tcpInWinUpdate      =  4739
        tcpInClosed         =  8220     tcpRttNoUpdate      =3314699518
        tcpRttUpdate        =1285937982 tcpTimRetrans       =5164257
        tcpTimRetransDrop   =  9274     tcpTimKeepalive     =147590
        tcpTimKeepaliveProbe= 24761     tcpTimKeepaliveDrop =  2037
        tcpListenDrop       =  2209     tcpListenDropQ0     =     0
        tcpHalfOpenDrop     =     0     tcpOutSackRetrans   =2574473

When i ping test from server to another server, sometimes server hold icmp packet 10 -> 30s same times with too much tcp retransmitt and tcp duplicate on server.
Code:
Fri Apr  4 14:49:47 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=853. time=0.547 ms
Fri Apr  4 14:49:48 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=854. time=5.22 ms
Fri Apr  4 14:49:49 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=855. time=0.513 ms
Fri Apr  4 14:49:50 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=856. time=0.618 ms
Fri Apr  4 14:49:59 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=857. time=8.12e+03 ms
Fri Apr  4 14:49:59 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=858. time=7.12e+03 ms
Fri Apr  4 14:49:59 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=859. time=6.13e+03 ms
Fri Apr  4 14:49:59 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=860. time=5.13e+03 ms
Fri Apr  4 14:49:59 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=861. time=4.13e+03 ms
Fri Apr  4 14:49:59 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=862. time=3.13e+03 ms
Fri Apr  4 14:49:59 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=863. time=2.13e+03 ms
Fri Apr  4 14:49:59 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=864. time=1.13e+03 ms
Fri Apr  4 14:49:59 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=865. time=130. ms
Fri Apr  4 14:50:00 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=866. time=0.606 ms
Fri Apr  4 14:50:01 ICT 2014: 64 bytes from 172.16.11.13: icmp_seq=867. time=10.3 ms

Too much TCP retransmitted and TCP duplicate on server Oracle Solaris 10-untitledpng
tcpstat.txt (2.2 KB) 
 

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