RE: New DB Connections Failing ?
- From: "VIVEK_SHARMA" <VIVEK_SHARMA@xxxxxxxxxxx>
- To: <oracle-l@xxxxxxxxxxxxx>
- Date: Wed, 15 Nov 2006 12:06:59 +0530
Folks
4 Points of Advice by Oracle Corp:-
1) This seems to be a failure to create a socket and resulting failure
to create a connection
2) There is an Operating System Error in the error stack:
ntresnt[1]=227, which appear to be 'can't assign requested address', but
you would need to verify this on your platform.
3) Verify that the adapters command shows all of the adapters, in
particular TCP
> adapters
> adapters sqlplus
4) Try using the actual IP address of the target database server in
place of the hostname to see if the
behavior changes.
../network/admin/cli_14053.trc sample:-
NOTE - It has the Error 12157 below in it.
[14-NOV-2006 12:48:14:866] ntt2err: entry
[14-NOV-2006 12:48:14:866] ntt2err: soc 9 error - operation=1,
ntresnt[0]=515, ntresnt[1]=227, ntresnt[2]=0
[14-NOV-2006 12:48:14:866] ntt2err: exit
[14-NOV-2006 12:48:14:875] nttcnp: exit
[14-NOV-2006 12:48:14:875] nttcon: exit
[14-NOV-2006 12:48:14:875] niotns: niotns failed to create NS ctx, error
code 12157
[14-NOV-2006 12:48:14:875] niotns: Couldn't connect, returning 12157
[14-NOV-2006 12:48:14:875] niotns: exit
[14-NOV-2006 12:48:14:875] nigcui: entry
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx
[mailto:oracle-l-bounce@xxxxxxxxxxxxx] On Behalf Of VIVEK_SHARMA
Sent: Tuesday, November 14, 2006 7:42 PM
Folks
In a NEW Setup, after about 700 database (dedicated server) Connections
are spawned, New Connections via the Listener process to the RAC
Database node from an Application server machine are FAILING.
Also Performance of Queries becomes very slow of already existing
Connections to the Database.
NOTE - CPU Utilization of the DB & APP Servers is Low.
$ sqlplus <user>/<passwd>@<connect string> gives the Oracle Error
ORA-12157
$ oerr ora 12157
12157, 00000, "TNS:internal network communication error"
// *Cause: Internal error during network communication.
// *Action: Not normally visible to the user. For further details, turn
// on tracing and reexecute the operation. If error persists, contact
// Worldwide Customer Support.
On DB Server Node:-
$ netstat -a | grep <Port Num of Listener process> | wc -l
700
Qs 1 - Will adding a 2nd Listener process to each of the 2 RAC Nodes
Help overcoming the NEW DB connections problem?
Thanks Indeed
Config:-
Oracle 10.2.0.2
HP-UX ver B11.23
Init.ora:-
processes=3500
sessions=3500
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