what do tcp_conn_request_max main?

[larryccccc]

Hello,
via "ndd -get /dev/tcp tcp_conn_request_max", I got 256, while when I use " netstat -an | grep EST| wc -l", I can got 600. So I was confused that how can I control the max incomming connections. Or how can I get current value of acceptable max_connections.
thanks

[U.SivaKumar_2]

Hi,
It is the setting of the system listen queue.
quote:
HP-UX 11 tcp_conn_request_max
Short Description: When high connection rates occur, a large backlog of TCP connection requests builds up and client connections are dropped.

When to try this parameter: This setting can significantly help performance when clients start to time out when waiting to connect. This can be verified by issuing the command,
netstat -p tcp

Look for the value
"connect requests dropped due to full queue"


How to see/set: To fix the problem set the tcp_conn_request_max to 1024 as follows:

ndd -set /dev/tcp tcp_conn_request_max 1024


regards,
U.SivaKumar

[larryccccc]

thank you for rapid replies.
I've questions more:
the max connections with clients can be configured or only limited by the server capacity?

[U.SivaKumar_2]

Hi,
you are right. Max connection have to be configured considering the resources of the
server like CPU speed , memory etc.

regards,
U.SivaKumar

[Sanjay_6]

Hi Larry,

Mayebe this will help,

http://support2.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000048319643

Hope this helps.

regds