[c-nsp] Extremely slow performing show running-config

[David Freedman]

Well, you are waiting for NVGEN which ...
<snip>

I've just found a URL which explains it so I don't have to :

http://6200networks.com/2008/09/17/configuration-generation-performance-enhancement/

I can tell you I have NVGEN caching enabled on 12.2SXH2a on SUP720

router(config)#parser config ?
  cache  Cache the configuration

Dave.


Jason Koh wrote:
> Hi there
> 
> I have a strange problem with a pair of cat6509s. Both are connected to each
> other via OSPF and IBGP, with EBGP with my upstream providers.
> 
> Whenever I use show running-config, it will pause for an extremely long time
> after the line "Building Configuration". It happens from either console or
> telnet sessions. At first I thought it was a CPU or memory problem, but
> "show proc cpu" and "show proc mem" shows nothing out of the ordinary (cpu
> less than 20% and memory with more than 256M free). Rebooting both machines
> doesn't solve the problem either.
> 
> After further investigations, I found out that the same problem occurs when
> I do the following as well.
> 
> 1) copy running-config startup-config
> 2) write memory
> 
> Show startup-config does not have this problem.
> 
>>From what I see, it looks like a problem with NVRAM. Also predictably, the
> session doing any of the 3 commands will lock the NVRAM preventing other
> sessions from doing a show startup-config as well. Killing the session
> (clear line vty or clear line console) that are doing any of the 3 command
> doesn't seem to kill the session at all.
> 
> It doesn't seem to be a hardware issue as both cat6509s display the same
> problem since early this month at the same time.
> 
> Any insights on this will be greatly appreciated.
> 
> Thanks.
> 
> /Jason
> 
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