Re: NFS, file system cache and shared_buffers

>> Why would they implement their own client?  Did they have to do something special in their client to
>> make it safe?
> 
> I think it is mostly a performance issue.  Each backend mounts its own copy
> of the data files it needs.

I personally would never put PostgreSQL on an NFS share on Linux.
Unless things have changed radically in the last couple years, Linux's
NFS code is flaky and unreliable, including flat-out lying about whether
stuff has been sent and received or not.  This is why NetApp's NFS
servers came with their own, proprietary, Linux kernel module.

NFS on Solaris/Illumos is a different story.  Not sure about FreeBSD.

-- 
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com