We have a set of oracle clients running on T5220 zones that need some help
Greetings all -
We have a set of oracle clients running on T5220 zones that need some help.
If, for example, I execute the query "select (all) from dba_objects", trace output reports 90% of the elapsed time spent under "SQLNet message from client".
Here are OS details for the clients: Solaris 10 5/08 s10s_u5wos_10 SPARC
Running "uname -a" from the client gives:
(SunOS bmc-ste-app 5.10 Generic_127127-11 sun4v sparc SUNW,SPARC-Enterprise-T5220)
Here are OS details for the dataserver: Enterprise Linux Enterprise Linux Server release 5.2
Running "uname -a" from the dataserver gives:
(2.6.18-92.1.6.0.2.el5 #1 SMP Thu Jun 26 17:44:55 EDT 2008 x86_64 x86_64 x86_64 GNU/Linux)
The RDBMS is 10.2.0.4
Again, please note, there is no application in the picture here. We are just running a simple catalog query (select * from dba_objects) from sqlplus. Why the wait on something like this? The wait also occurs when a different query is used (select (all) from SYS.COL$ where rownum < 50000). And it doesn't matter if I used the full client or the instant client. I still get the same high-wait.
We had thought - maybe this is a network thing - so we put a test client on the same subnet as the dataserver. This helped - but not enough. The wait is still way too high even with firewalls taken out of the equation.
We've also looked at arraysize, SDU, kernel settings. And we've spent time going over tkprof, truss and sqlnet-tracing.
Has anyone ever had to solve this HIGH WAIT ON CLIENT issue? Is there a work around or some tweak I'm missing.
Is anyone configured like we are (linux dataserver, solaris clients)? If so - did you see anything like this?
tia -
Jim
Edited by: jim1768 on Mar 31, 2010 1:47 PM
Edited by: jim1768 on Mar 31, 2010 2:12 PM
Edited by: jim1768 on Mar 31, 2010 2:13 PM
Hello,
We have the exact same issue. Did you ever solve this issue? We have a t5220 and have just upgraded our 11.5.10.2 11i system on it from 9.2.0.8 32-bit sparc to 11.2.0.1 64-bit sparc. Things should be faster but arent, and our consultant has tracked it down to high wait times when the apps tier using forms connects to the database tier on the same box. So even though the t5220 is both server and client, there is something about the client sql connection.through TNS that his having trouble. Thanks for any information. We've also created an S/R with Oracle.
Note: I am well aware of the other issues with the CMT server series but this particular issue seems independent of the regular / known issues and remains a mystery to us. Other known issues with the CMT servers for SPARC:
Metalink Note 781763.1 (Migration from fast single threaded CPU machine to CMT UltraSPARC T1 & T2)
http://blogs.sun.com/glennf/resource/Optimizing_Oracle_CMT_v1.pdf
http://blogs.sun.com/glennf/tags/throughput
http://blogs.sun.com/glennf/entry/getting_past_go_with_sparc
http://www.oracle.com/apps_benchmark/doc/E-Bus-11i-PAY_ORA_SUN-T5220.pdf (this paper has some oracle init settings at the end. The kernel settings have been included in the OS upgrade)
http://blogs.sun.com/mandalika/entry/siebel_on_sun_cmt_hardware
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