AIX

AIX

Connect with fellow AIX users and experts to gain knowledge, share insights, and solve problems.


#Power
 View Only
Back to discussions
Expand all | Collapse all

7778-23X Blade slow network write speed

  • 1.  7778-23X Blade slow network write speed

    Posted Tue May 29, 2012 11:28 AM

    Originally posted by: Dukes


    I have an IBM Blade, model 7778-23X, running AIX 5.3.11 that is getting extremely slow network write speeds. It doesn't seem to matter the network load or if I use FTP, SCP, CP over NFS, etc… to move the file. And to rule out the network I put a blade in the same chassis as the 7778 and placed it on the same network and my write speeds were the same. Below is an example of moving an 11MB .pdf file from one AIX system to the 7778 using 'time scp':
    filename.pdf 100% 11MB 71.1KB/s 02:41
    real 2m45.093s
    user 0m0.257s
    sys 0m0.061s

    The network interfaces are active\passive team and I have tried failing them over and still the same results. Both the blade chassis switch and interfaces are set to AutoNegotiate and connected at 1GB FullDuplex. Read speeds to pull files off the server are normal, read\write speeds on the server itself or normal, it is just transferring files into the server via the network. I was thinking it could be network buffer cache but running netstat -c shows no updated stats. However, running netstat -v the teamed interface shows a high number of Transmit Queue Overflow which is odd to me. The current active interface ent3 shows 0 though(below). My next step is possibly removing the team and recreating it but I have a very small downtime window each month so I was hoping to find a reason for the slowness before hand so I will know the best approach to take. Any assistance or ideas would really be appreciated. Thanks.
    ent4 (teamed interface):
    Transmit Statistics: Receive Statistics:
    Packets: 376415157590 Packets: 134926249591
    Bytes: 518419980572197 Bytes: 12427530822270
    Interrupts: 0 Interrupts: 99614541450
    Transmit Errors: 0 Receive Errors: 16
    Packets Dropped: 0 Packets Dropped: 22
    Bad Packets: 22
    Max Packets on S/W Transmit Queue: 217
    S/W Transmit Queue Overflow: 184
    Current S/W+H/W Transmit Queue Length: 70

    Active Interface (ent3)
    Transmit Statistics: Receive Statistics:
    Packets: 17432563868 Packets: 6259473087
    Bytes: 24330052031456 Bytes: 498339148838
    Interrupts: 0 Interrupts: 4846098225
    Transmit Errors: 0 Receive Errors: 8
    Packets Dropped: 0 Packets Dropped: 0
    Bad Packets: 0
    Max Packets on S/W Transmit Queue: 75
    S/W Transmit Queue Overflow: 0
    Current S/W+H/W Transmit Queue Length: 44
    #AIX-Forum


Related Content