If I see VACUUM ANALYZE VERBOSE output like this...
INFO: --Relation public.foo--
INFO: Index idx_foo_bar: Pages 219213; Tuples 28007: Deleted 9434.
CPU 17.05s/4.58u sec elapsed 3227.62 sec.
...am I correct in reading this to say that it took more than 53 minutes
(3227 secs) to get 17 seconds of CPU time? Is this an indicator of
possible I/O contention? What else would account for this if my CPUs are
clearly not very busy?
TIA.