topic Re: tcp_keepstart in Operating System - HP-UX

tcp_keepstart

mlewis — Thu, 03 Aug 2006 09:42:58 GMT

DOes anyone know if tcp_keepstart is available for 11.11i? i have ran the
# ndd -h supported command but cannot find it as a n option? And our Sybase team expects it to be alterred?

Re: tcp_keepstart

Steven E. Protter — Thu, 03 Aug 2006 09:55:28 GMT

Shalom,

I think there should be an ndd command that performs the same function but is not named the same.

tcp_keepalive_interval - Interval for sending keepalive probes

Try ndd -h supported for more options.

SEP

Re: tcp_keepstart

mlewis — Thu, 03 Aug 2006 10:05:06 GMT

Thats cool, I have found that but she has requested the both of them become changed. If they are both one of the same that makes my life easier. Thanks for the quick reply

Re: tcp_keepstart

mlewis — Thu, 03 Aug 2006 10:05:59 GMT

Thannks

Re: tcp_keepstart

Steven E. Protter — Thu, 03 Aug 2006 11:01:18 GMT

Shalom again,

There are unsupported options on ndd as well. I'd take a look at the requirements being thrust upon you, its possible your DBA is reading something that does not apply to this OS.

Also, please take the time to assign points to answers that helped you.
http://forums1.itrc.hp.com/service/forums/pageList.do?userId=BR929435&listType=unassigned&forumId=1

Ettiquette:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=140137

Best of luck to you. Please assign both my posts to this thread zero, since they appear to be of little or no value to your situation.

SEP

Re: tcp_keepstart

rick jones — Thu, 03 Aug 2006 19:38:06 GMT

IIRC "tcp_keepstart" may be a Solarisism, which suggests that your Sybase team is confusing their OSes :) The TCP stacks in Solaris and HP-UX 11* share a common ancestry, but they are increasingly distant cousins as neither retain a relationship with their common point of origin.

tcp_keepalive_interval has already been mentioned. it will only come into play if the application does a setsockopt() to set SO_KEEPALIVE.

TCP keepalives are at best a poor substitute for an application-level keepalive mechanism.

There is also a tcp_keepalive_detached_interval, which kicks-in after the application has called close() against the socket.

Re: tcp_keepstart

Steven E. Protter — Thu, 03 Aug 2006 22:38:03 GMT

Thanks Rick, I feel validated.

SEP

Re: tcp_keepstart

rick jones — Fri, 04 Aug 2006 13:18:57 GMT

FWIW, tcp_keepstart may instead be a 10.20ism - I seem to recall tcp_keepstart and tcp_keepfreq in the dimm recesses of my memory.