On Sun, Apr 14, 2019 at 4:51 PM Gunther <raj@gusw.net> wrote:
For weeks now, I am banging my head at an "out of memory" situation. There is only one query I am running on an 8 GB system, whatever I try, I get knocked out on this out of memory.
Is PostgreSQL throwing an error with OOM, or is getting killed -9 by the OOM killer? Do you get a core file you can inspect with gdb?
You might want to see the query, but it is a huge plan, and I can't really break this down. It shouldn't matter though. But just so you can get a glimpse here is the plan:
Maybe it is memory for trigger or constraint checking, although I don't know why that would appear instantly. What triggers or constraints do you have on businessoperation?
What if you just run the SELECT without the INSERT? Or insert into a temp table rather than into businessoperation? And if that doesn't crash, what if you then insert to businessoperation from the temp table?