NET_BUFFER_SZ doesn't affect shared memory. It tells netbackup what size
data transfers you'd like to attempt over your network. It sets that using
setsockopt, then reads the result using getsockopt. Your system is limiting
the data transfer size. Check tcp_recv_hiwat and tcp_xmit_hiwat using ndd.
r whatever your system uses to modify/check these things. Example for
solaris:

ndd -get /dev/tcp tcp_recv_hiwat

You'll probably want to contact your os vendor, or google for more info.

George

On Mon, 8 Dec 2003, Nash, Ebon wrote:

> If the number of shared buffers is set to a value greater than that allowed
> by the max shared memory, the number of buffers is adjusted to the number of
> buffers allowed by the available shared memory at the time of the backup.
>
>
> Ebon
>
> >  -----Original Message-----
> > From:       veritas-bu-admin AT mailman.eng.auburn DOT edu
> > [mailto:veritas-bu-admin AT mailman.eng.auburn DOT edu]  On Behalf Of 
> > Shafto,
> > Eric
> > Sent:       Monday, December 08, 2003 11:53 AM
> > To: 'veritas-bu AT mailman.eng.auburn DOT edu'
> > Subject:    Net_Buffer_Sz question
> >
> >
> > I am having a problem with very slow remote NDMP backups. In the process
> > of troubleshooting, the tech at Veritas noticed the following in the bptm
> > log:
> >
> > 16:27:21.071 [19385] <2> io_set_recvbuf: setting receive network buffer to
> > 65536 bytes
> > 16:27:21.071 [19385] <2> io_set_recvbuf: receive network buffer is 57344
> > bytes
> >
> > Note the mismatch between what the receive buffer was supposed to be set
> > to and what it was actually set to. Checking, I find a similar occurrence
> > at my two other sites. Can anyone give me a clue what's actually going on
> > here and whether it's important?
> >
> > Many thanks,
> >
> > Eric Shafto
> >
> >
> >
> >
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