topic Re: Urgent: kenerl parameters in Operating System - HP-UX

Urgent: kenerl parameters

Carlos Fernandez Riera — Tue, 05 Dec 2000 15:40:09 GMT

My syslog.log shows new messages for me:

Dec 5 10:35:10 uba00101 inetd[456]: telnet/tcp: accept: File table overflow

Dec 4 12:58:23 uba00101 inetd[456]: telnet/tcp: accept: No buffer space available

URGENT suggentions, please

Re: Urgent: kenerl parameters

Kenneth Platz — Tue, 05 Dec 2000 15:55:34 GMT

Carlos,

The "file table overflow" error indicates that either your inetd process is exceeding its per-process file table size, or it is trying to exceed the global file table size. These are controlled by the following two kernel parameters:
maxfiles: Soft file limit per process
maxfiles_lim: Hard file limit per process
nfile: Max (global) number of open files

You can check whether your system is close to exceeding the "nfile" parameter via the command:

# sar -v 1 110:51:12 text-sz ov proc-sz ov inod-sz ov file-sz ov
10:51:13 N/A N/A 139/340 0 534/540 0 452/902 0

In this case this indicates that the file table size is at 452/902, or approximately 50% full. If this shows that your system is approximately 90% full or higher, then you should increase the nfile parameter in addition to maxfiles.

I am unfamiliar with the second error.

Re: Urgent: kenerl parameters

James R. Ferguson — Tue, 05 Dec 2000 16:05:21 GMT

Carlos:

Try these kernel settings as a start:

# npty 400
# nstrpty 400
# nfile 8192
# ninode 8192

Also: The kernel parameter 'nstrtel' specifies the number of telnet device files that the kernel can support for incoming telnet sessions. This number should match the number of device files that exist on the system.

See this document for an overview:

http://docs.hp.com/hpux/onlinedocs/os/KCparams.OverviewAll.html

...JRF...

Re: Urgent: kenerl parameters

Carlos Fernandez Riera — Tue, 05 Dec 2000 16:10:04 GMT

Thank you:

I was suspecting it was what you said, but i need a fast confirmation.

Second message may be on the way.

Re: Urgent: kenerl parameters

Carlos Fernandez Riera — Tue, 05 Dec 2000 16:17:16 GMT

James:

Thank you too.

I was asking about meaning of these new messages for me.
I`ll see you on monday