On 2021-Oct-08, Wells Oliver wrote:
> Dug out some more logging:
> 2021-10-08 20:35:08 UTC::@:[12682]:LOG: server process (PID 3970) was terminated by signal 9: Killed
> 2021-10-08 20:35:08 UTC::@:[12682]:DETAIL: Failed process was running: CREATE INDEX ...
So what's happening here is that the instance is running out of RAM
while creating some index, and the kernel is killing the process. I
would probably blame the combination of shared_buffers=4GB with
maintenance_work_mem=2GB, together with the instance's total RAM.
I would suggest to keep an eye on memory usage (if there is such a
thing) in the RDS console; with some experimentation, reducing
maintenace_work_mem as Bruce adviced and/or shared_buffers, you can
probably find some combination that doesn't take as long as with the
default params but is able to complete.
--
Álvaro Herrera PostgreSQL Developer — https://www.EnterpriseDB.com/