Memory Excessive Fragmentation ???

Unanswered Question
Mar 18th, 2010
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Hello Everybody ,



I've received from our management station the following message : Memory excessive fragmentation, Someone could you say me if they are some commands for throubleshoot this error and see the memory status of the switch.

The running platform is :  WS-C6509  with WS-X6K-SUP2-2GE   supervisor.


thanks in advance


gianfranco

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Giuseppe Larosa Thu, 03/18/2010 - 09:38
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Hello Gianfranco,

you should use

sh proc mem


example


sh proc mem
Processor Pool Total:  168488064 Used:   69705432 Free:   98782632
      I/O Pool Total:   35651584 Used:    9616800 Free:   26034784


PID TTY  Allocated      Freed    Holding    Getbufs    Retbufs Process
   0   0   72180632    8760800   58147560          0          0 *Init*         
   0   0      15824  175449416      15824          0          0 *Sched*        
   0   0 1824137536 1763277992     690112    8978216          0 *Dead*   


taken from a device like yours



Hope to help

Giuseppe

lamav Thu, 03/18/2010 - 09:59
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Gianfranco:


You have to investigate why the memory allocation is fragemented in the first place. It could be a result of a DoS attack on the control plane, which is pretty easily addressed with CoPP.


Or you can be using a dated version of IOS. An upgrade may be in order.


Sometimes something as simple as a reboot clears the memory buffers and clears the problem....


HTH


Victor

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