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

One extra bit, if this helps:

chrisr(at)ff1:~$ cat /proc/meminfo
MemTotal: 8163104 kB
MemFree: 2183692 kB
MemAvailable: 3648680 kB
Buffers: 170080 kB
Cached: 1231708 kB
SwapCached: 0 kB
Active: 1083596 kB
Inactive: 442312 kB
Active(anon): 125128 kB
Inactive(anon): 3584 kB
Active(file): 958468 kB
Inactive(file): 438728 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 499708 kB
SwapFree: 499708 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 124124 kB
Mapped: 42472 kB
Shmem: 4596 kB
Slab: 144788 kB
SReclaimable: 97612 kB
SUnreclaim: 47176 kB
KernelStack: 10672 kB
PageTables: 6332 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 2484108 kB
Committed_AS: 900632 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 202276 kB
VmallocChunk: 34359464540 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
HugePages_Total: 4
HugePages_Free: 3
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 1048576 kB
DirectMap4k: 83776 kB
DirectMap2M: 4110336 kB
DirectMap1G: 6291456 kB

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
>