PROBLEM: Postgres fails to start due to kernel issue?
From: Dave Haywood
Date: Thu Jan 19 2012 - 19:56:24 EST
Hi,
I noticed after upgrading to 3.2.0-08812-gc2bc3a3 that Postgres-9.1 server fails to start with error:
FATAL: could not create shared memory segment: Function not implemented
DETAIL: Failed system call was shmget(key=5432001, size=30523392, 03600).
After some googling, I thought it was a SYSV shared memory sizing issue but manually changing kernel.shmmax and kernel.shmall had no effect.
The problem has been introduced between 3.2.0-08694-g53999bf and 3.2.0-08812-gc2bc3a3.
Let me know if you need any more information. Bisecting is *very* slow on this machine!
Broken version (latest):
$ sudo sh scripts/ver_linux
Linux s1 3.2.0-09429-g90a4c0f #133 SMP Thu Jan 19 15:17:03 GMT 2012 i686 Pentium III (Coppermine) GenuineIntel GNU/Linux
Gnu C 4.6.2
Gnu make 3.82
binutils 2.21.1
util-linux 2.19.1
mount support
module-init-tools 3.16
e2fsprogs 1.41.14
Linux C Library 2.14.1
Dynamic linker (ldd) 2.14.1
Procps 3.2.8
Net-tools 1.60_p20110409135728
Kbd 1.15.3wip
Sh-utils 8.7
$ sudo sysctl -a | grep shm
kernel.shmmax = 33554432
kernel.shmall = 2097152
kernel.shmmni = 4096
kernel.shm_rmid_forced = 0
vm.hugetlb_shm_group = 0
Working version (last good backup):
$ sudo sh scripts/ver_linux
Linux s1 3.2.0 #124 SMP Thu Jan 5 08:06:00 GMT 2012 i686 Pentium III (Coppermine) GenuineIntel GNU/Linux
Gnu C 4.6.2
Gnu make 3.82
binutils 2.21.1
util-linux 2.19.1
mount support
module-init-tools 3.16
e2fsprogs 1.41.14
Linux C Library 2.14.1
Dynamic linker (ldd) 2.14.1
Procps 3.2.8
Net-tools 1.60_p20110409135728
Kbd 1.15.3wip
Sh-utils 8.7
$ sudo sysctl -a | grep shm
kernel.shmmax = 33554432
kernel.shmall = 2097152
kernel.shmmni = 4096
kernel.shm_rmid_forced = 0
vm.hugetlb_shm_group = 0
Dave.
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