Updates on Impact of "npty kernel parameter" to the system

[jok]

Our current login is 128, npty value is 60. Would this settings have an impact on our machine(HP'N)..

thanks

jok

[Printaporn_1]

Hi,

npty normally use for telnet session.
you can increase more as you want.
after using sam to modify npty , sam will crease device files for you.
if you're modify kernel by command line , you have to use insf to create pty device files manually.

[Steven Sim Kok Leong]

Hi,

Perform the following:

last |grep "still logged in"|wc -l

If this is more than your npty value, you will have a problem. npyy specifies the maximum number of pseudo-tty data structures available on the system. It is fine to increase the npty value to a very big value (maximum is memory limited) since no other kernel parameters are dependent on it.

Hope this helps. Regards.

Steven Sim Kok Leong
Brainbench MVP for Unix Admin
http://www.brainbench.com

[Karthik_2]

Jok,
Yes the default value of npty is 60 .
You can safely increase it to say 200 .
I have 200 in my N class developement env.
and note that the pty devices are used only for telnet , rlogin sessions not when the user
connects to the database using SQLnet etc.

Cheers
Karthik...