Tuning Parameter tcp_conn_request_max

[Cliff Lim Kok Hwee]

Gd Day Forum,

I need to tune the parameter tcp_conn_request_max=2048.

Query: Do I add an entry into the /etc/rc.config.d/nddconf as follows?

TRANSPORT_NAME[0]=tcp
NDD_NAME[0]= tcp_conn_request_max
NDD_VALUE[0]= 2048

And after amending it to the required value when will it take effect?

Thanks/cliff

[bhavin asokan · Accepted solution]

hi,

see the following link.

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=207158

regds,

[Cliff Lim Kok Hwee]

Hi Bhavin Asokan,

Thanks for the redirection.

Cheers cliff

[Sridhar Bhaskarla]

Hi Cliff,

//And after amending it to the required value when will it take effect?//

You will have to run 'ndd -c' to read the configuration from nddconf file. Otherwise, it will come into effect after the next reboot. To verify the value, simply do

ndd -get /dev/tcp tcp_conn_request_max

-Sri

[rick jones]

The ndd -c suggestion is good, or you can just run

ndd -set /dev/tcp tcp_conn_request_max 2048

as root. The nddconf file will be read on the next boot. The advantage of ndd -c is you will see if there is an error in the file sooner.

I take it you saw connections being dropped due to full queue in the output of netstat -p tcp and that is why you are increasing tcp_conn_request_max?