[c-nsp] pruned routes, memory still low on Cisco 7507

[neal rauhauser]

  I have some 7507s under my care with RSP4s taking full routes from Sprint
and McLeod. We were getting tight on memory so we stopped accepting all /24s
except 192.0.0.0/7. The memory usage reported by "sh ip bgp su" dropped from
about 57 meg to half of that, but "show proc mem" still appears to be
dangerously low - only 2 meg free on one box.



   I'm running 12.0.32S1 and the machines have been behaving well. Here is
the output from show proc mem with the small ones trimmed. Does IOS keep
freed memory in the hands of the pool manager progress instead of returning
it to free?


Processor Pool Total:  226703104 Used:  218622916 Free:    8080188
     Fast Pool Total:     131072 Used:      41520 Free:      89552

 PID TTY  Allocated      Freed    Holding    Getbufs    Retbufs Process
   0   0   31186132    2023652   27989872          0          0 *Init*
   0   0   73089468   73017480     102000    5445248          0 *Dead*
   3   2    1209752    1203344      19428          0          0 SSH Process
   5   0   13460616   13441660      82616   12944160   12925980 Pool Manager

 120   0  136896088  137283172       9972          0          0 Key Proc
 137   0    2961332    2955272      13836          0          0 IP SNMP
 138   0    2330260        840      12984          0          0 PDU
DISPATCHER
 139   0    9692288   12026916      12984          0          0 SNMP
ENGINE
 152   0  608723404   15033408  188591304          0          0 BGP
Router
 153   0    4721760  284125592       7040          0          0 BGP
I/O
 154   0          0    4746544       9984          0          0 BGP
Scanner
 155   0       5984       4720      12504          0          0 OSPF-1 Hello