Re: PostgreSQL's share_buffer calculation using shmget() versus kernel.shmmax

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Thu, Feb 7, 2013 at 11:01 AM, Mel Llaguno <mllaguno@xxxxxxxxxxxx> wrote:
> Having to guess this value is far from ideal; what I'd like is the formula used by postgresql that generates the shmget() value displayed in the pgctl.log.
>

There is no easy way or at least none that I'm aware of, to get the
exact value of shared memory needed for Postgres. If you have access
to the source code, you can look at CreateSharedMemoryAndSemaphores()
function in src/backend/storage/ipc/ipci.c to see what all goes in
determining the size for shmget()

Thanks,
Pavan

-- 
Pavan Deolasee
http://www.linkedin.com/in/pavandeolasee


-- 
Sent via pgsql-admin mailing list (pgsql-admin@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-admin


[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux