[Xorp-hackers] memory consumption of xorp_bgp

[Yi Wang]

Hi,

I was wondering if there is a way to reduce the memory consumption of  
xorp_bgp.

My recent tests showed a setup of a XORP BGP instance (version 1.4)  
with:
- 2 eBGP peers (each dumps the full ~200k routing table) and 30 iBGP  
peers (not exporting any routes) needs 1.25GB memory;
- similar setup with 2 eBGP peers and 50 iBGP peers requires 1.91GB  
memory;
(- similar setup with 20 eBGP peers and 1 iBGP peer requires 2.58GB  
memory).

This makes my 3.6GB RAM box challenged to do emulations of a  
reasonably larger scale,
such as 10 eBGP peers (~2M routes in total) and 100 iBGP peers.

I was wondering if there is (relatively simple) way to reduce the  
memory consumption
of xorp_bgp?  I understand there are more than one copy of each route  
stored, such as
ribIn_table, cache_table (import and export branches), and  
aggregation_table.  But
I'm not sure if I found all the permanent storages (probably not).

Any hints / advices?

Thanks,
Yi