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Date:      Wed, 5 Dec 2007 12:46:19 +0100
From:      Gergely CZUCZY <phoemix@harmless.hu>
To:        freebsd-questions@freebsd.org
Subject:   more then 2G shm on RELENG_7
Message-ID:  <20071205114619.GA32423@harmless.hu>

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Hello,

I'm to test PostgreSQL on a 7-BETA3. The box has 12GB of memory in it,
I've adjusted the sysctls, but postgresql always fails to allocate the
SHM if it's bigger then 2GB.

How can I make it to allocate more SHM than 2G at once?

sysctl.conf:
kern.ipc.shmall=3D1572864
kern.ipc.shmmax=3D6442450944
kern.ipc.semmap=3D1024
kern.ipc.shm_use_phys=3D1

/boot/loader.conf:
zfs_load=3D"YES"
vm.kmem_size=3D"1073741824"
vm.kmem_size_max=3D"1073741824"
kern.ipc.semmni=3D1024
kern.ipc.semmns=3D2048
kern.ipc.semmnu=3D1024

I've also hit a similar issue with qemu, but that wasn't shared memory,
I had just tried to make it allocate more than 2GBs for a single vm, but
that also failed. Still haven't figured out why was that.

Sincerely,

Gergely Czuczy
mailto: gergely.czuczy@harmless.hu

--=20
Weenies test. Geniuses solve problems that arise.

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