Don't hard-code the SiteNodeCache sizes in the library file,
but allow configuration via the config-file.
Example:
#
# Provide tailored sizes for the site node cache in acs-tcl:
#
ns_section ns/server/${server}/acs/acs-tcl
ns_param SiteNodesCacheSize 2000000
ns_param SiteNodesIdCacheSize 100000
ns_param SiteNodesChildenCacheSize 100000
#