HPUX Error: 233: No buffer space available

[Khairul_1]

Hi,
We have rx5670 11.23 HP-UX Cluster server running oracle 9i (9.2.0.8)Telecom Billing Online Database.

Some day ago, we found following error message on listerner.log but in system log file there is no error.

TNS-12560: TNS:protocol adapter error
TNS-00530: Protocol adapter error
HPUX Error: 233: No buffer space available
03-APR-2008 17:19:11 * 12560
TNS-12560: TNS:protocol adapter error
TNS-00530: Protocol adapter error
HPUX Error: 233: No buffer space available

After contact with Oracle Support team they suggest to change following kernel parameter:
dbc_min_pct =2%
dbc_max_pct =25%
tcp_conn_req_max=10240

Present Kernel Parameter:
dbc_min_pct =10
dbc_max_pct =10
tcp_conn_req_max=4096

Can any one please share there knowledge on above error message and kernel parameter changes procedure?

How to change tcp_conn_req_max? by using ndd command or edit the /etc/rc.config.d/nddconf file?
Thanks
Khairul

[Yogeeraj_1]

hi Khairul,

the error message that you are getting is generally seen during high workload on a server.

For this one, you should Free up memory on the machine or review your memory settings.


See also:
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=989347

hope this helps!

kind regards
yogeeraj

[Jeeshan]

Hi Khairul

Stop Application is important first.

Edit /etc/rc.config.d/nddconf, add-in lines
TRANSPORT_NAME[n]=tcp
NDD_NAME[n]=tcp_conn_request_max
NDD_VALUE[n]=4096

NOTE: n = 0, 1, 2, 3, 4 ....

But ensure before that changes of the above file the following OS Patches is installed before any changes:
PHKL_31500 s700_800 11.23 Sept04 base patch
PHNE_35117 s700_800 11.23 Kernel RPC cumulative patch

Contact with HP regarding the patches.

set kernel parameters like below
dbc_min_pct =5
dbc_max_pct =10