Postscreen memcache settings

[brad . chandler]

I'm testing out postscreen with a shared memcache between different 
servers. What should I set as the cachesize in /etc/sysconfig/memcached? 
We get about 1 million connections per day.

Also, what is the recommendation for the ttl in postscreen_cache? Am I 
correct in assuming that the higher I set the ttl, the larger the cache 
size will be, so that these two settings need to be coordinated? What 
happens if the cachesize is too low?