SAP recommended ninode value for HPUX/Oracle

Hi everybody,
as per the sap note 172747, SAP recommends the Kernel parameter "ninode" value to be 34816 for a SAP/Oracle/HPUX installation.
The current usage of inodes in one of the SAP systems shows over 53% and in future we would like to increase the ninode parameter value. So I would like to the on which other OS kernel parameter values is the value "34816" based. Is there a defined calculation?
Ker.Parameter current       used
nfile     65536     19519
nproc     2560     499
npty     60     3
nstrpty     60
nstrtel     60
maxusers     256
maxfiles     1024
ncsize (DNLC)39936
ninode     34816     18817
any suggestions on this would be of great help.
Thaks,
Gangadhar

Thank you Venkatesh and Mauricio for the replies and sorry for the delayed reply.
@Venkatesh
The SAP system here is an application server only. Aditionally a middleware software "IBM MQseries" is installed on it which is acts as an interface for global data transfer. So i wanted to know if there is any defined calculation behind the sap note recommened ninode value.
@Mauricio
To avoid recovery problems i think it is safe to have the ninode usage less than 50%. Especially when many disks are used and parallell restores are started.
I found some formulae in google search for ninode.
((NPROC16MAXUSERS)32(2*NPTY))
(8*NPROC+2048)
Nproc80(13*maxusers)
which means that ninode has dependecies on nproc, maxusers an npty
Below are the currently configured parameters.
#kmtune -q nproc
Parameter             Current Dyn Planned                    Module     Version
===============================================================================
nproc                    2560 - (10*MAXUSERS)
#kmtune -q ninode
Parameter             Current Dyn Planned                    Module     Version
===============================================================================
ninode                  34816 - 34816
#kmtune -q maxusers
Parameter             Current Dyn Planned                    Module     Version
===============================================================================
maxusers                  256 - 256
#kmtune -q npty
Parameter             Current Dyn Planned                    Module     Version
===============================================================================
npty                       60 - 60
If the ninode value is increased which would result in ninode usage to be less than 50%, will there be any impact on system performance?
Thanks in adavance
Gangadhar

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