[CentOS] Kernel parameters ignored -

[John R Pierce]

On 2/17/2016 6:39 AM, Michael H wrote:
> Some additional information;
>
> sysctl -a | grep kernel.shm
> kernel.shmall = 8650752
> kernel.shmmax = 35433480192
> kernel.shmmni = 4096
>
> which corresponds to my /etc/sysctl.conf
> kernel.shmmax=35433480192
> kernel.shmall=8650752
>
> but contradicts;
> ulimit -a
> [...]
> stack size              (kbytes, -s) 8192


SysV Shared Memory has nothing to do with stack size.

note, btw, the latest releases of postgres (I think as of 9.3?) no 
longer need large values of shmall,shmmax as they now use a different 
method of allocating the shared_buffers ...

-- 
john r pierce, recycling bits in santa cruz