when the autovacuum: vacuum analyze will be triggered, it will delete dead tuples and than will analyze table
but
when the autovacuum: vacuum will be triggered it will only mark for deletion dead tubles.
Is it valid explanation for postgres 9.4?
Thanks
I believe that when the ANALYZE portion of autovacuum kicks in, it only does the analyze. Which is why it's frequently tuned to run more often than the VACUUM portion of autovacuum since it's less of a load.