On Wed, Jan 3, 2018 at 6:13 PM, Thuc Nguyen Canh <thucnguyencanh@xxxxxxxxx> wrote: > And here is the result from postgres container: > > mount | grep /dev/shm > => shm on /dev/shm type tmpfs (rw,nosuid,nodev,noexec,relatime,size=65536k) Bingo. Somehow your container tech is limiting shared memory. That error is working as designed. You could figure out how to fix the mount options, or you could disable parallelism with max_parallel_workers_per_gather = 0. -- Thomas Munro http://www.enterprisedb.com