ftp/tcp: accept: No buffer space available

[Manoj_20]

Hi Masters

I have got a HP9000 K580 system running hp-ux 11.00. It is used to download files thru FTP. Clients from various places locally as well as remotely used to connect to server. There will be hundreds of ftp connection to download files.

Problem is at peak hour system gives following error message:

"inetd[917]: ftp/tcp: accept: No buffer space available"

And system will be damn slow because of 100% CPU & Memory utilization.

Please guide me to solve this issue.

Thanks in advance

Manoj

[Robert-Jan Goossens]

Hi Manoj,

Sound a bit like a tcp parameter tcp_conn_request_max check this doc on docs.hp.com

http://tinylink.com/?bA2yamPLsI

Hope this helps,
Robert-Jan

[rick jones]

99 times out of ten, that message means that by the time inetd (unless you are running a standalone FTP daemon) got around to calling accept() on a connection from an FTP client, that client had given-up on the connection attempt.

It suggests your system is overloaded.

There may indeed be some value in increasing tcp_conn_request_max - IIRC, 11.0 inetd asks for a listen backlog of 128, so making tcp_conn_request_max at least 128 would be good, but I wouldn't expect toooo much fom that.

If you wish to address the memory utilization, you might make sure you are up on the latest FTP patches as there were some that addressed memory utilization by the ftpd. CPU util, well, if you are already on a K580, the only CPU upgrade is to a newer box.

[Sanjiv Sharma_1]

Hi Manoj,

Please check this link:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=190143

[T G Manikandan]

It is not only the high memory utilization is the cause for the problem.

Install the latest network patches

PHNE_21767
PHNE_21217