Re: LOG: munmap(0x7fff80000000) failed: Invalid argument

Oh the email spam :P

I did another reboot test to validate the error. It does exist; it does not
spam munmap error like it did with the aptitude install.

I then marked the log file, shutdown (1 munmap during), marked it again and
then started it (1 munmap during).

MARK PRE-SHUTDOWN
2016-10-11 20:02:45 UTC [1656-2] LOG: received fast shutdown request
2016-10-11 20:02:45 UTC [1656-3] LOG: aborting any active transactions
2016-10-11 20:02:45 UTC [1707-2] LOG: autovacuum launcher shutting down
2016-10-11 20:02:45 UTC [1704-1] LOG: shutting down
2016-10-11 20:02:45 UTC [1704-2] LOG: database system is shut down
2016-10-11 20:02:45 UTC [1656-4] LOG: munmap(0x7fff80000000) failed:
Invalid argument
MARK PRE-START
2016-10-11 20:03:02 UTC [9894-1] LOG: database system was shut down at
2016-10-11 20:02:45 UTC
2016-10-11 20:03:02 UTC [9894-2] LOG: MultiXact member wraparound
protections are now enabled
2016-10-11 20:03:02 UTC [9893-1] LOG: database system is ready to accept
connections
2016-10-11 20:03:02 UTC [9898-1] LOG: autovacuum launcher started
2016-10-11 20:03:02 UTC [9899-1] LOG: munmap(0x7fff80000000) failed:
Invalid argument
2016-10-11 20:03:02 UTC [9900-1] [unknown](at)[unknown] LOG: incomplete
startup packet

On Mon, Oct 10, 2016 at 5:21 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Chris Richards <chris(at)infinite(dot)io> writes:
> > Setting up postgresql-9.5 (9.5.4-1.pgdg14.04+2) ...
> > Creating new cluster 9.5/main ...
> > config /etc/postgresql/9.5/main
> > data /var/lib/postgresql/9.5/main
> > locale en_US.UTF-8
> > LOG: munmap(0x7fff80000000) failed: Invalid argument
> > [... snip 14 or so repeats ...]
> > LOG: munmap(0x7fff80000000) failed: Invalid argument
> > socket /var/run/postgresql
> > port 5433
> > update-alternatives: using
> > /usr/share/postgresql/9.5/man/man1/postmaster.1.gz to provide
> > /usr/share/man/man1/postmaster.1.gz (postmaster.1.gz) in auto mode
> > * Starting PostgreSQL 9.5 database server
> > [ OK ]
> > Processing triggers for libc-bin (2.19-0ubuntu6.6) ...
>
> > I'm able to connect and I dumped a few default relations.
>
> > Is the munmap error of concern? It remains upon rebooting / restarting
> the
> > server.
>
> Seems pretty fishy to me; I don't know what would be causing it.
>
> [ digs in code... ] One theory is that PGSharedMemoryDetach is getting
> called more than once, but I'm not sure how that would happen. Can you
> characterize where this happens more precisely? What nondefault settings
> have you got in postgresql.conf?
>
> regards, tom lane
>