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Home -> Community -> Mailing Lists -> Oracle-L -> RE: SQL*Net Connection under-performing
Ferenec , List
tnsnames.ora has been setup on the Database Server itself & tnsping is being issued also from the Database Server itself to avoid any network path.
For the SAME ORACLE_HOME & using the SAME tnsnames.ora file tnsping to the 2 Databases on the DB Server machine is taking 10,000 ms & 10 ms respectively
Can there be any overheads / other concerns with usign this parameter , as respective machines are Production Servers ?
Thanks indeed
-----Original Message-----
Sent: Tuesday, February 04, 2003 1:10 AM
To: Multiple recipients of list ORACLE-L
Vivek
I had similar issues with a large customer. I solved this by setting up pre-spawned dedicated processes in the listener. Full in structions available on Metalink. I brought down 1 minute login times to under 10 seconds, by configuring 20 - 40 prespawned connections. Let me know how it works. This can be done relatively easily even in production, configure listener.ora and then simply bounce the listener. Your initial login after that may take you a minute until all the prespawned connections are initiated.
HTH. Regards :
Ferenc Mantfeld
Dreaming costs you nothing. Not dreaming costs you everything.
SITUATION - With DB Server CPU Idle being 0 % & load average 60-70 % :- tnsping Connect to one of the Databases (1) takes about 10,000 ms
truss -fdD tnsping <connect string>
29504: 20.0006 18.8113 read(3, "\0 K\0\004\0\0\0 "\0\0 ?".., 2064) = 75
Thus 18.... seconds taken as shown above
Whereas to another Database (2) tnsping takes only 10 ms on the Same machine
DETAILS :-
0) 1 GBPS network path exits from APP Servers to the Database Server.
Database 2 Has about 1500 Oracle processes connecting to it
2) Both Databases have Different ORACLE_HOMEs
3) sqlnet.ora of Database 1 :-
AUTOMATIC_IPC=OFF
TRACE_LEVEL_CLIENT=OFF
TRACE_LEVEL_SERVER=OFF
TNSPING.TRACE_LEVEL=OFF
NO sqlnet.ora exists on Database 2
4) NO process.dat , regid.dat exists in ORACLE_HOME/network/log Dir of ORACLE_HOME for Both Database
5) Multiple listener processes are Running for BOTH Databases
Qs How may the issue be approached ?
--
Please see the official ORACLE-L FAQ: http://www.orafaq.net
--
Author: VIVEK_SHARMA
INET: VIVEK_SHARMA_at_infosys.com
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