Question

Oracle 10g NET: INVALID SID

Asked by: fu_do

Hi,
I have a strange problem, 2 days ago we start to experience a problem with one of our bussinses  applications that connect to Oracle 10g database, application connects by direct connection 192.168.1.232:1521:test to our database. Sometimes (2-5 times a day in irregular intervals) if you try to open application it will hang and after 5-10 min it will come with NET: INVALID SID. This condition will stay for 15-35 min and it will start to work again without apparent reason and will work for 2-4 hours. Im a system admin and Im not that good with Oracle so my question is it possible that our problem is caused by domain or network issues. I tested network connectivity and all is fine (all other network applications and server works without any problem) also I check all possible domain problems and there is noon .So only problem I have is that application that connects to Oracle server. The last change on the network is that we added a DHCP server and all the client computer are getting ip address by DHCP server (lease time is 6 days)
Thanks.
F

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Asked On
2009-09-01 at 09:16:52ID24698490
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Oracle 10g

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Oracle 10.x

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Oracle CRM

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Oracle Product Info

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Answers

 

by: mrjoltcolaPosted on 2009-09-01 at 09:30:24ID: 25233248

I doubt it is a domain issue, invalid SID is an Oracle error that indicates the client connected to a listener, but was not successful establishing fully connection with the database instance. Is this a cluster or a single node?

Its possible there is a resource issue and this happens under high load. Can you clarify the number of users and when the load is highest?

Check the oracle alert log (background_dump_dest directory)

sqlplus / as sysdba
SQL> show parameter background_dump

Look in the alert_<SID>.log and see if there are any errors.

 

by: fu_doPosted on 2009-09-01 at 09:48:24ID: 25233435

Thanks for the quick respond, as a answer to first part it is a single node. No i do not know number of users but i will check firt thing in the morning.
I was also told that it myth be a problem with DHCP, i do not know how but that is wnat i was told by one BD admin?
Thanks again.
F

 

by: fu_doPosted on 2009-09-01 at 11:24:25ID: 25234408

Hi this is what i get in test_ora_5428.trc

Dump file d:\oracle\product\10.2.0\admin\test\bdump\test_ora_5428.trc
Tue Sep 01 14:16:26 2009
ORACLE V10.2.0.1.0 - 64bit Production vsnsta=0
vsnsql=14 vsnxtr=3
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bit Production
With the Partitioning, OLAP and Data Mining options
Windows NT Version V5.2 Service Pack 2
CPU                 : 8 - type 8664, 2 Physical Cores
Process Affinity    : 0x0000000000000000
Memory (Avail/Total): Ph:2926M/20477M, Ph+PgF:3504M/40502M
Instance name: test
Redo thread mounted by this instance: 1
Oracle process number: 0
Windows thread id: 5428, image: ORACLE.EXE

error 20 in job queue process
ORA-00020: maximum number of processes (150) exceeded

Is this cousing problem with connection.
Thanksssssssssss

 

by: mrjoltcolaPosted on 2009-09-01 at 11:29:06ID: 25234468

Yes, as I suspected. You need to increase the PROCESSES parameter.

You need to restart the instance to do this, so you'll need a maintennance window.startup 


alter system set processes = 300 scope = spfile;
 
shutdown immediate;
startup open;
                                              
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Select allOpen in new window

 

by: fu_doPosted on 2009-09-01 at 12:03:48ID: 31623106

thank you for your help,
Regards

20120131-EE-VQP-002

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