> Hi, > > I have a 1.6TB database with over 330 tables on a 4TB NVMe SSD. All > tables are static (no updates); most in 8M and 33M row sizes. Queries have > been great, until recently. > Also attached is the relevant system journal entries for one query that > took 2 seconds and two more that took 62 and 52 seconds... Unlike the > above, these had 3 processes in disk-wait -- see attached screenshot... > > I just stopped PG, updated the full backup which was done overnight (so > the update took about a second), restarted PG and the problem persists... > > Any suggestions where to look next? > > Thanks, > Pierre Hi Pierre, I have seen this type of behavior when parallel queries were enabled and PostgreSQL decided that a parallel sequential scan query was the fastest option. Try disabling them and see if that helps. Regards, Ken
