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Jayme_41167's avatar
Jayme_41167
Icon for Nimbostratus rankNimbostratus
Dec 03, 2014

F5 LTM increasing "TMM Used Memory"

Hi. I have a BIGIP run LTM 11.5.1 HF2 only. My TMM Used Memory increasing indefinitely.

 

I believe that the Subsystem xdata is responsible. What is the xdata?

 

I run the command:

 

tmsh show /sys memory | egrep 'Max\ Alloc|xdata'

 

SubSystem Alloc (bytes) Max Alloc (bytes) Object Size

 

xdata 1.1G 1.1G 2048

 

Thanks, Jayme

 

application delivery
LTM
management
memory
tmm
TMOS
  • Jayme_41167's avatar
    Jayme_41167
    Icon for Nimbostratus rankNimbostratus
    Dec 05, 2014

    Hi All, F5 released another hotfix (HF6) day 12/03/14. Apparently the problem was solved. Thank you all.

     

  • Syed_Nazir_1624's avatar
    Syed_Nazir_1624
    Icon for Cirrus rankCirrus
    Dec 04, 2014

    Xdata is used as a temporary buffer for storing TCP data that is not acked by either client or server. Either the client or the server is slow. Check the xdata after closing all the client and server side connection it should come down.

     

    • Jayme_41167's avatar
      Jayme_41167
      Icon for Nimbostratus rankNimbostratus
      Dec 04, 2014
      I saw on the dashboard that whenever there is a peak traffic, xdata size increases and consequently the memory used TMM also increases. This helps in anything? Thanks.
    • Jayme_41167's avatar
      Jayme_41167
      Icon for Nimbostratus rankNimbostratus
      Dec 04, 2014
      At dawn the connections go to 0 (only get the monitoring of connections Servers - icmp and http), but the xdata not decreases. Does memory leak? Thanks.
  • What_Lies_Bene1's avatar
    What_Lies_Bene1
    Icon for Cirrostratus rankCirrostratus
    Dec 04, 2014

    Hmmm, I think xdata may have something to do with one embedded subsystem or another. Sounds like you might be affected by a memory leak. I'd suggest you call F5 support to clarify.

     

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