log_checkpoints = on
log_connections = on
log_disconnections = on
log_lock_waits = on
log_temp_files = 0
log_autovacuum_min_duration = 0
log_min_duration_statement = 0
log_error_verbosity = default
NULL
wronglyselect count(*)
from rentals
where end_at is null
Fraction of column entries that are null
\watch
[ seconds ]
default_statistics_target=100
default_statistics_target=1000
analyze
if too slow