Re: very slow queries when max_parallel_workers_per_gather is higherthan zero

Apologies, the reduced query was missing a where condition on id_week:

SELECT count(*)
FROM f_ticketupdate_aad5jtwal0ayaax AS f
INNER JOIN
  dwh_dm_aabv5kk9rxac4lz_aaonw7nchsan2n1_aad8xhr0m_aaewg8j61iagl1z AS d
  ON (f.dt_event_id = d.id)
WHERE ( 6171 = d."id_euweek" )


regards

-- 
Tomas Vondra                  http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services