Re: Death postgres

On 2023-05-05 21:14, Marc Millas wrote:
> Hi,
>
> postgres 14.2 on Linux redhat
>
> temp_file_limit set around 210 GB.
>
> a select request with 2 left join have crashed the server (oom killer) 
> after the postgres disk occupation did grow from 15TB to 16 TB.
>
> What are the cases where postgres may grow without caring about 
> temp_file_limit ?
>
> thanks,
>

Some OSes like IIRC RHEL9 now default to tmpfs for /tmp - if your temp 
files are written in a tmpfs then it may may very well trigger the OOM 
because of the temp file used up all RAM.

Check the filesystem type of your temp file's location.

--
Thomas