Re: pg14b1 stuck in lazy_scan_prune/heap_page_prune of pg_statistic - Mailing list pgsql-hackers

On Sun, Jun 6, 2021 at 9:35 AM Justin Pryzby <pryzby@telsasoft.com> wrote:
> I'll leave the instance running for a little bit before restarting (or kill-9)
> in case someone requests more info.

How about dumping the page image out, and sharing it with the list?
This procedure should work fine from gdb:


https://wiki.postgresql.org/wiki/Getting_a_stack_trace_of_a_running_PostgreSQL_backend_on_Linux/BSD#Dumping_a_page_image_from_within_GDB

I suggest that you dump the "page" pointer inside lazy_scan_prune(). I
imagine that you have the instance already stuck in an infinite loop,
so what we'll probably see from the page image is the page after the
first prune and another no-progress prune.

-- 
Peter Geoghegan