Re: Segmentation Fault

Woke up this morning excited to create a core dump and... it worked.

Not only does it work, it works fast. Query time dropped from 5.5s to 1.2s.
That was what I was hoping to get out of the VACUUM ANALYZE.

Very confused. I don't get it. I hope it doesn't happen again, but if it
does I'll get the core dump.

rjsjr

On Wed, Sep 13, 2023 at 6:58 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Robert Sanford <wobbet(at)gmail(dot)com> writes:
> > I realized that when I was running GDB I just took a snap of when it
> > failed. Here I've added after continuing and requesting a backtrace.
>
> This is still quite unhelpful; it appears to show normal behavior in
> a process that's not the failing one. There is some advice about
> collecting useful backtraces at
>
>
> https://wiki.postgresql.org/wiki/Generating_a_stack_trace_of_a_PostgreSQL_backend
>
> I'd counsel the method of enabling core dumps and then attaching
> gdb to a core file, rather than dealing with live processes.
>
> regards, tom lane
>