Oracle-L: RE: 100% CPU utilization, urgent

From: Thomas Day <tday6_at_csc.com>
Date: Mon, 20 Jan 2003 09:04:33 -0800
Message-ID: <F001.00534C4C.20030120090433@fatcity.com>

If you run the second script you will get the CPU utilization (whatever that means) per SID. In your case SIDs 1-6 are the ones that you're interested in. The NT Task Manager will only show you ORACLE.EXE. It doesn't show the embedded threads.

                                                                                                                                       
                      "Koivu, Lisa"                                                                                                    
                      <Lisa.Koivu              To:      Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>                    
                      @efairfield.com>         cc:                                                                                     
                      Sent by: root            Subject: RE: 100% CPU utilization, urgent                                               
                                                                                                                                       
                                                                                                                                       
                      01/20/2003 10:36                                                                                                 
                      AM                                                                                                               
                      Please respond                                                                                                   
                      to ORACLE-L

Thomas, thanks for your post.

However I don't see where I can match the threads on NT to what I see in Task Manager. Am I missing something?

To be more explicit, here's what I've got:

SQL> select * from dba_nt_threads;

ID_THREAD B NAME SID SERIAL# USERNAME STATUS OSUSER
--------- - ----- --------- ---------- ------------------------------

-------- 3144 1 PMON 1 1 ACTIVE SYSTEM 2436 1 DBW0 2 1 ACTIVE SYSTEM 2972 1 LGWR 3 1 ACTIVE SYSTEM 3172 1 CKPT 4 1 ACTIVE SYSTEM 2976 1 SMON 5 1 ACTIVE SYSTEM 3380 1 RECO 6 1 ACTIVE SYSTEM 2840 11 1973 LISA ACTIVE lkoivu2 900 12 2 DBSNMP INACTIVE SYSTEM

8 rows selected.

I see no processes in task manager that correspond to any of the numbers listed in ID_THREAD. In fact my sessions script used to reference spid, but I took it out because I couldn't make sense of it on Windows.

Thanks for any insight.

Lisa Koivu
Oracle Dogbarf Cleanerupper
Fairfield Resorts, Inc.
5259 Coconut Creek Parkway
Ft. Lauderdale, FL, USA 33063

-----Original Message-----

Sent: Monday, January 20, 2003 9:00 AM
To: Multiple recipients of list ORACLE-L

Create the view dba_nt_threads and query it, then run the monitor CPU per session. These are not my scripts --- I'm pretty sure that they were posted here by others --- but I did not capture the information on who originally wrote them. My apologies. HTH

--cr_dba_nt_threads.sql

run as sys create or replace view dba_NT_threads as select p.spid "ID_THREAD", p.background "BACKGROUND", b.name "NAME", s.sid "SID", s.serial# "SERIAL#", s.username "USERNAME", s.status "STATUS", s.osuser "OSUSER", s.program "PROGRAM" from v$process p, v$bgprocess b, v$session s where s.paddr = p.addr and b.paddr(+) = p.addr; create public synonym dba_nt_threads for dba_nt_threads; create public synonym threads for dba_nt_threads;
monitor CPU per session
requires timed statistics on col sid format 99999999 SELECT v.SID, SUBSTR(s.NAME,1,30) "Statistic", v.VALUE FROM V$STATNAME s, V$SESSTAT v WHERE s.NAME = 'CPU used by this session' AND v.STATISTIC# = s.STATISTIC#

                      Hussain Ahmed


                      Qadri <hussain           To:      Multiple recipients

of list ORACLE-L <ORACLE-L_at_fatcity.com>

                      @skm.org.pk>             cc:


                      Sent by: root            urgent






                      01/20/2003 12:44


                      AM


                      Please respond


                      to ORACLE-L

HI all
We have a consistent problem of CPU utilization 100%. We have had this problem since Saturday, but it automatically subsided, I mean went back to normal after a few hours, and remained normal on Sunday as well. But its back to 100% since morning, that is when the load on the server has gone up

again to 100% and over all work is non-existent.

Our machine is Compaq Proliant ML350, 900 MB ram, 933 single Processor, Database size of roughly 5 GB. WINNT4.0, Oracle 8.1.7.

I have checked the temporary tablespaces, they are normal. We have a 24x7 environment, a hospital, so please can you suggest the areas

to look in to, its really very urgent.

Regards,

Hussain

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Author: Thomas Day
INET: tday6_at_csc.com

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Author: Thomas Day
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