select instance_name from apm_packages
where package_id = :package_id
select count(*)
from rss_gen_subscrs s,
acs_sc_impls i
where s.summary_context_id = :package_id
and s.impl_id = i.impl_id
and i.impl_name = 'pinds_blog_entries'
and i.impl_owner_name = 'lars-blogger'