connect requests dropped due to full queue

[Eduardo_63]

Hi Friends'

I've Oracle Applications on HP-UX.
I see much TIME_WAIT stat with the port 8000 on the server in where reside Apache, also see(netstat -p tcp):

49 connect requests dropped due to full queue

This behavior is normal ?


Thanks,

[RAC_1]

I think, you need to look at three different ndd settings.

tcp_con_request_max
tcp_time_wait_interval - How long stream persists in TIME_WAIT tcp_tw_cleanup_interval - TIME_WAIT timeout expiration checking interval

You can check your current settings as follows.

ndd -h tcp_con_request_max

Anil

[Eduardo_63]

Hi Anil,

The values:

tcp_con_request_max =4096
tcp_time_wait_interval=60000
tcp_tw_cleanup_interval=60000


Thanks,

[Eduardo_63]

Hi friend,

the netstat show :

$ netstat -an | grep tcp| awk '{print $6}'| sort | uniq -c
421 CLOSE_WAIT
130 ESTABLISHED
629 FIN_WAIT_2
79 LISTEN
1 SYN_SENT
460 TIME_WAIT

any suggestion?

[rick jones]

The actual length of a listen queue will be the _minimum_ of tcp_conn_request_max and whatever the application provides in its call to listen(). So, if tcp_conn_request_max is 1024 and the application calls listen(fd,128) 128 will be the depth of the listen queue.

HP-UX, and just about any other TCP stack out there, can deal with lots of TIME_WAIT without any trouble, so there should be no need to tweak anything there.