Which process taking high CPU

Hi
Our environment is having SCOM 2007 R2.
I want to get the details of processes taking high CPU,memory in windows server 2003 , 2008. These details are stored in Opsmgr DatawareHouse ? , can I get in the form of reports? OR any script available.Please help.
Regards
Madhavi

Hi Madhavi,
Run this script on a server and you will get the individual process utilization. I am not sure how you exactly need this.
strComputer = "localhost"
Set objWMIService = GetObject("winmgmts:" _
    & "{impersonationLevel=impersonate}!\\" _
    & strComputer & "\root\cimv2")
Set colProcesses = objWMIService.ExecQuery _
   ("Select * from Win32_Process")
For Each objProcess in colProcesses
    Wscript.Echo "Process: " & objProcess.Name
    sngProcessTime = (CSng(objProcess.KernelModeTime) + _
        CSng(objProcess.UserModeTime)) / 10000000
    Wscript.Echo "Processor Time: " & sngProcessTime
    Wscript.Echo "Process ID: " & objProcess.ProcessID
    Wscript.Echo "Working Set Size: " _
    & objProcess.WorkingSetSize
    Wscript.Echo "Page File Size: " _
    & objProcess.PageFileUsage
    Wscript.Echo "Page Faults: " & objProcess.PageFaults
Next
Let me know if this helps
Regards, Dhanraj

Similar Messages

How to find which query taking more cpu

Hi,
How to find which query taking more CPU
at a particular point of time .
Chhers,

Take a look at Server Standard Reports. It has a few CPU usage oriented reports.
You can also track CPU usage by server-side tracing:
http://www.sqlusa.com/bestpractices/createtrace/
Glenn Berry's CPU usage query:
SELECT TOP(25) p.name AS [SP Name], qs.total_worker_time AS [TotalWorkerTime],
qs.total_worker_time/qs.execution_count AS [AvgWorkerTime], qs.execution_count,
ISNULL(qs.execution_count/DATEDIFF(Second, qs.cached_time, GETDATE()), 0) AS [Calls/Second],
qs.total_elapsed_time, qs.total_elapsed_time/qs.execution_count
AS [avg_elapsed_time], qs.cached_time
FROM sys.procedures AS p WITH (NOLOCK)
INNER JOIN sys.dm_exec_procedure_stats AS qs WITH (NOLOCK)
ON p.[object_id] = qs.[object_id]
WHERE qs.database_id = DB_ID()
ORDER BY qs.total_worker_time DESC OPTION (RECOMPILE);
LINK:
http://dba.stackexchange.com/questions/52216/sql-server-2008-high-cpu-historical-queries
Query optimization:
http://www.sqlusa.com/articles/query-optimization/
Kalman Toth Database & OLAP Architect
SELECT Video Tutorials 4 Hours
New Book / Kindle: Exam 70-461 Bootcamp: Querying Microsoft SQL Server 2012

Airport Process utilizing high CPU utilization

I currently have a 13 inch MacBook Pro i7 (2012 version). Recently I upgraded to Mavericks. After using the computer for a day after the upgrade, I began to notice it becoming very hot and the fans running very high. Looking at the running processes i noticed that a process called "airport" was running and utilizing high CPU times causing the heating up and fans running. Once I stopped this process, the laptop went back to operating at normal levels.
Unfortunately this issue began to come back several times....the "airport" process starting at any time and utilizing high CPU utilization....again only by killing this process fixed this issue.
After seeing this behavior over several days, I decised to wipe the drive and install a clean copy of Mavericks in the computer. Thought here was that possibly something did not carry over correctly from the upgrade from Mountain Lion to Mavericks. Unfortunely this did not correct the issue with the "airport" process as it still is continiung to launch at any time and spike the processor until I manually kill the process.
I do not recall this issue occuring while running Mountain Lion so it seems to be specific to Mavericks at this point.
I was hoping to hear if any other have experienced this type of issues while running Mavericks.

You should be able to find the information you are looking for from the default Total CPU Utilization Percentage monitor. This monitor has a built in diagnostic task that will kick off when an alert is triggered to list the top cpu consuming processes.
To find which processes were causing CPU to spike, simply review the State Change Events history in health explorer for the machine that was affected, for the Total CPU Utilization Percentage monitor. I have modified my second screen shot
to remove machine names, but you should get the idea. If a cpu monitor went from green to red, it will run the diagnostic task and list the process information and cpu usage at the time of the alert under state change events.

Mdworker process suddenly high CPU usage

Hi All
I've been running Mountain Lion since it was released, upgrading from Lion. I've never had a problem with mdworker until a few days ago when suddenly, the mdworker process started hitting 90% CPU on my iMac.
I've disabled Spotlight, deleted the .Spotlight directories, rebooted the iMac, but each time mdworker . Prior to this, the iMac's CPU temperature was around 43C, with very little CPU usage, but now it is around 60C and 100% across the two cores. The only way to 'get back to normal' is to use :
sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.metadata.mds.plist
but of course Spotlight doesn't work at all.
I've used 'sudo fs_usage -w -f filesys mdworker' but I can't see anything that mdworker is perhaps choking on.
Does any have any ideas? I'm racking my brain to remember if I did anything different a few days back that might have caused this to happen, but apart from just normal email and web surfing, nothing else springs to mind.
Help!
Paul

David Losada
This solved my questionRe: mdworker process suddenly high CPU usage Nov 28, 2012 1:41 AM (in response to antobal)
In my case it was the BritannicaBookmark.mdimporter that was a PowerPC mdimporter. But it was not in \library\spotlight but inBritannica 12.0/Ultimate Reference Suite.app/Contents/Library/Spotlight.
You can see what spotlight plugin is choking on you by selecting the mdworker process in the Activity monitor and click on Open files and processes.
Sounds helpful, but I don't see "Open files and processes" in Activity Monitor. If I click on inspect, I get a choice to "Sample" processes. I get a system log that is a bit beyond me.
antobal Brussels, Belgium
Re: mdworker process suddenly high CPU usage Oct 3, 2012 12:47 PM (in response to asfafa)
I was having the same problem, and a second level support person at Apple helped me solve the issue today:
Look in the \library\spotlight folders both at your drive root level and your user folder. These folders contain spotlight plugins, with the extension .mdimporter. Some of those plugins, if defective, can make the Spotlight indexing processes to run continuously.
Also sounds helpful, I found .mdimporter files in my system library, but nothing looked unusual. I didn't see a spotlight folder in my user library. I looked in application support and several other places. I used Onyx to repair permissions, rebuild spotlight index, clear caches etc, rebooted, it seems to be OK now.

Dock process has high CPU usage after Mountain Lion upgrade

Dock process has high CPU usage after Mountain Lion upgrade and possibly after installing XCode as well.
When I run "sudo opensnoop -n Dock" I see the following being constantly repeated.
501    263 Dock          28 /Applications/Xcode.app
501    263 Dock          28 /Applications/Xcode.app/Contents
501    263 Dock          28 /Applications/Xcode.app/Contents/Info.plist
501    263 Dock          28 /Applications/Xcode.app/Contents/Info.plist
501    263 Dock          28 /Applications/Xcode.app/Contents/Resources
501    263 Dock          28 /Applications/Xcode.app/Contents/Resources
501    263 Dock          28 /Applications/Xcode.app/Contents/Resources/English.lproj
501    263 Dock          -1 /Applications/Xcode.app/Contents/Resources/Base.lproj
501    263 Dock          28 /Applications/Xcode.app/Contents/PkgInfo
501    263 Dock          28 /Applications/Xcode.app/Contents/MacOS/Xcode
501    263 Dock          28 /.vol/16777218/92542858
501    263 Dock          29 /Applications/Xcode.app/Contents/Library/Spotlight/uuid.mdimporter/Contents/Inf o.plist
501    263 Dock          28 /Applications/Adobe Dreamweaver CS5/Configuration/Shared/ICE/Templates
501    263 Dock          28 /Applications/Adobe Dreamweaver CS5/Configuration/Shared/MM
501    263 Dock          28 /Applications/Adobe Dreamweaver CS5/Configuration/Shared/MM/Cache
501    263 Dock          28 /Applications/Xcode.app/Contents/Resources
501    263 Dock          28 /Applications/Xcode.app/Contents/Resources
501    263 Dock          28 /Applications/Xcode.app/Contents/Resources/English.lproj
501    263 Dock          -1 /Applications/Xcode.app/Contents/Resources/Base.lproj
501    263 Dock          28 /Applications/Xcode.app/Contents/PkgInfo
501    263 Dock          28 /Applications/Xcode.app/Contents/MacOS/Xcode
501    263 Dock          28 /.vol/16777218/92542858
501    263 Dock          29 /Applications/Xcode.app/Contents/Library/Spotlight/uuid.mdimporter/Contents/Inf o.plist
501    263 Dock          28 /Applications/Adobe Dreamweaver CS5/Configuration/Shared/MM/Images
When I run "killall Dock" it resolves it for awhile and then comes back.

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https://discussions.apple.com/message/18825564#18825564

Process SERVER0 its taking High CPU Time in XI

Hi,
We installed XI 3.0 develpoment server ,Process <b>SERVER0</b> its taking more CPU time.
We are using AS/400 OS & DB2 datbase.Can any one tell me the reason & Solution for this.
Thanks & Regards,
Gopinath.

hi,
Actually the user XIRWBUSER its an RFC user but its running on many dialog process.I think high CPU time due to this user only.
using 5 work processes and 3/4 of the available CPU for an extended amount of time.
Total Total DB
Job or CPU Sync Async CPU
Task User Number Thread Pty Util I/O I/O Util
WP11 D6464 485368 00000010 20 54.0 25 37 27.8
WP05 X4242 498642 00000098 20 49.6 5 0 36.7
WP04 X4242 498641 00000014 20 48.8 1 0 39.1
WP02 X4242 498639 0000025A 20 47.1 2 0 37.8
WP06 X4242 498643 000001E6 20 43.7 0 0 38.3
WP00 X4242 498637 00000014 20 11.1 502 194 2.9
pls can any one help me
Regards,
Gopinath.

Server Process taking all CPU time intermittently on Solaris

Hi,
What does my program do :-
We have been facing this problem from many days, We have a server
process which is continuously listening at a port on Solaris 5.8.
Whenever a request is sent to this server a new thread & a socket is created for that client.
This process is running as a proxy server, which connects to some other machine on client request.
Problem:
The process start taking whole CPU after few days, happens in a weeks
period. The process remain in this state for few hours & after that it
stops responding to any requests.
& the only thing which can be done, to make it work is to restart the
process.
If someone has faced a similar problem then please let me know if you
have found a solution for that.
I will give 10 duke dollars to you if you can provide a solution for this problem.
Regards,
Sachin

Here is another class which is used in my code:
package com.ge.med.service.olea.telnetapplet.proxy;
import java.io.*;
import java.net.*;
import java.util.*;
* This class is a generic framework for a flexible, multi-threaded server.
* It listens on any number of specified ports, and, when it receives a
* connection on a port, passes input and output streams to a specified Service
* object which provides the actual service. It can limit the number of
* concurrent connections, and logs activity to a specified stream.
public class Server {
// This is the state for the server
ConnectionManager connectionManager; // The ConnectionManager object
Hashtable services; // The current services and their ports
ThreadGroup threadGroup; // The threadgroup for all our threads
PrintWriter logStream; // Where we send our logging output to
* This is the Server() constructor. It must be passed a stream
* to send log output to (may be null), and the limit on the number of
* concurrent connections. It creates and starts a ConnectionManager
* thread which enforces this limit on connections.
public Server(OutputStream logStream, int maxConnections) {
setLogStream(logStream);
log("Starting server");
threadGroup = new ThreadGroup("Server");
connectionManager = new ConnectionManager(threadGroup, maxConnections);
connectionManager.start();
services = new Hashtable();
* A public method to set the current logging stream. Pass null
* to turn logging off
public void setLogStream(OutputStream out) {
if (out != null) logStream = new PrintWriter(new OutputStreamWriter(out));
else logStream = null;
/** Write the specified string to the log */
protected synchronized void log(String s) {
if (logStream != null) {
logStream.println("[" + new Date() + "] " + s);
logStream.flush();
/** Write the specified object to the log */
protected void log(Object o) { log(o.toString()); }
* This method makes the server start providing a new service.
* It runs the specified Service object on the specified port.
public void addService(Service service, int port) throws IOException {
Integer key = new Integer(port); // the hashtable key
// Check whether a service is already on that port
if (services.get(key) != null)
throw new IllegalArgumentException("Port " + port + " already in use.");
// Create a Listener object to listen for connections on the port
Listener listener = new Listener(threadGroup, port, service);
// Store it in the hashtable
services.put(key, listener);
// Log it
log("Starting service " + service.getClass().getName() +
" on port " + port);
// Start the listener running.
listener.start();
* This method makes the server stop providing a service on a port.
* It does not terminate any pending connections to that service, merely
* causes the server to stop accepting new connections
public void removeService(int port) {
Integer key = new Integer(port); // hashtable key
// Look up the Listener object for the port in the hashtable of services
final Listener listener = (Listener) services.get(key);
if (listener == null) return;
// Ask the listener to stop
listener.pleaseStop();
// Remove it from the hashtable
services.remove(key);
// And log it.
log("Stopping service " + listener.service.getClass().getName() +
" on port " + port);
* This nested class manages client connections for the server.
* It maintains a list of current connections and enforces the
* maximum connection limit. It creates a separate thread (one per
* server) that sits around and wait()s to be notify()'d that a connection
* has terminated. When this happens, it updates the list of connections.
public class ConnectionManager extends Thread {
int maxConnections; // The maximum number of allowed connections
Vector connections; // The current list of connections
* Create a ConnectionManager in the specified thread group to enforce
* the specified maximum connection limit. Make it a daemon thread so
* the interpreter won't wait around for it to exit.
public ConnectionManager(ThreadGroup group, int maxConnections) {
super(group, "ConnectionManager");
this.setDaemon(true);
this.maxConnections = maxConnections;
connections = new Vector(maxConnections);
log("Starting connection manager. Max connections: " + maxConnections);
* This is the method that Listener objects call when they accept a
* connection from a client. It either creates a Connection object
* for the connection and adds it to the list of current connections,
* or, if the limit on connections has been reached, it closes the
* connection.
synchronized void addConnection(Socket s, Service service) {
// If the connection limit has been reached
if (connections.size() >= maxConnections) {
try {
PrintWriter out = new PrintWriter(s.getOutputStream());
// Then tell the client it is being rejected.
out.println("Connection refused; " +
"server has reached maximum number of clients.");
out.flush();
// And close the connection to the rejected client.
s.close();
// And log it, of course
log("Connection refused to " + s.getInetAddress().getHostAddress() +
":" + s.getPort() + ": max connections reached.");
} catch (IOException e) {log(e);}
else { // Otherwise, if the limit has not been reached
// Create a Connection thread to handle this connection
Connection c = new Connection(s, service);
// Add it to the list of current connections
connections.addElement(c);
// Log this new connection
log("Connected to " + s.getInetAddress().getHostAddress() +
":" + s.getPort() + " on port " + s.getLocalPort() +
" for service " + service.getClass().getName());
// And start the Connection thread running to provide the service
c.start();
* A Connection object calls this method just before it exits.
* This method uses notify() to tell the ConnectionManager thread
* to wake up and delete the thread that has exited.
public synchronized void endConnection() { this.notify(); }
/** Change the current connection limit */
public synchronized void setMaxConnections(int max) { maxConnections=max; }
* Output the current list of connections to the specified stream.
* This method is used by the Control service defined below.
public synchronized void printConnections(PrintWriter out) {
for(int i = 0; i < connections.size(); i++) {
Connection c = (Connection)connections.elementAt(i);
out.println("CONNECTED TO " +
c.client.getInetAddress().getHostAddress() + ":" +
c.client.getPort() + " ON PORT " + c.client.getLocalPort()+
" FOR SERVICE " + c.service.getClass().getName());
* The ConnectionManager is a thread, and this is the body of that
* thread. While the ConnectionManager methods above are called by other
* threads, this method is run in its own thread. The job of this thread
* is to keep the list of connections up to date by removing connections
* that are no longer alive. It uses wait() to block until notify()'d by
* the endConnection() method.
public void run() {
while(true) { // infinite loop
// Check through the list of connections, removing dead ones
for(int i = 0; i < connections.size(); i++) {
Connection c = (Connection)connections.elementAt(i);
if (c != null && !c.isAlive()) {
connections.removeElementAt(i);
               try      {
                    //close server socket. SPR SVCge16539. Sachin Joshi.
                    Socket server = ProxyServer.Proxy.getServerSocket(c.client);
                    if (server != null)
                         server.close();
                    //close client socket.
                    if (c.client != null)
                         c.client.close();
               catch (java.io.IOException e)     {
                    System.err.println("Error closing connection " + e);
               catch (Exception e)     {
                    System.err.println("Cannot Establish Connection !! " + e);
log("Connection to " + c.client.getInetAddress().getHostAddress() +
":" + c.client.getPort() + " closed.");
          System.out.println("Total Connections now = " + connections.size());
// Now wait to be notify()'d that a connection has exited
// When we wake up we'll check the list of connections again.
try { synchronized(this) { this.wait(); } }
catch(InterruptedException e) {}
* This class is a subclass of Thread that handles an individual connection
* between a client and a Service provided by this server. Because each
* such connection has a thread of its own, each Service can have multiple
* connections pending at once. Despite all the other threads in use, this
* is the key feature that makes this a multi-threaded server implementation.
public class Connection extends Thread {
Socket client; // The socket to talk to the client through
Service service; // The service being provided to that client
* This constructor just saves some state and calls the superclass
* constructor to create a thread to handle the connection. Connection
* objects are created by Listener threads. These threads are part of
* the server's ThreadGroup, so all Connection threads are part of that
* group, too.
public Connection(Socket client, Service service) {
super("Server.Connection:" + client.getInetAddress().getHostAddress() +
":" + client.getPort());
this.client = client;
this.service = service;
* This is the body of each and every Connection thread.
* All it does is pass the client input and output streams to the
* serve() method of the specified Service object. That method
* is responsible for reading from and writing to those streams to
* provide the actual service. Recall that the Service object has been
* passed from the Server.addService() method to a Listener object
* to the ConnectionManager.addConnection() to this Connection object,
* and is now finally getting used to provide the service.
* Note that just before this thread exits it calls the
* ConnectionManager.endConnection() method to wake up the
* ConnectionManager thread so that it can remove this Connection
* from its list of active connections.
public void run() {
try {
InputStream in = client.getInputStream();
OutputStream out = client.getOutputStream();
// service.serve(in, out);
((ProxyServer.Proxy)service).serve(in, out,client);
catch (IOException e) {log(e);}
finally { connectionManager.endConnection(); }
* Here is the Service interface that we have seen so much of.
* It defines only a single method which is invoked to provide the service.
* serve() will be passed an input stream and an output stream to the client.
* It should do whatever it wants with them, and should close them before
* returning.
* All connections through the same port to this service share a single
* Service object. Thus, any state local to an individual connection must
* be stored in local variables within the serve() method. State that should
* be global to all connections on the same port should be stored in
* instance variables of the Service class. If the same Service is running
* on more than one port, there will typically be different Service instances
* for each port. Data that should be global to all connections on any port
* should be stored in static variables.
* Note that implementations of this interface must have a no-argument
* constructor if they are to be dynamically instantiated by the main()
* method of the Server class.
public interface Service {
public void serve(InputStream in, OutputStream out) throws IOException;
     }

SMON process consume High CPU in production setup.

Hi,
Recently we migrate our storage from IBM DS4700 to IBM v7000. on last Saturday from yesterday and today cpu almost 100 percent in peak hours.
Right now our datafiles in SSD and archivelogs in SAS disk.
Please suggest
regards,
Karthi.

Hi Karthi,
Which SMON process is consuming CPU ,I mean,Database SMON /ASM SMON if is in use.
+ Install and enable OSwatcher with atleast 30 seconds interval and monitor which process /what is causing high CPU.
+ If they are oracle processes ,then validate what are they doing at database level .
Does it comes from any application code ,if so validate those sqls.
+ Install procwatcher to understand what are they doing .
Refer::-----------
==============
Procwatcher: Script to Monitor and Examine Oracle DB and Clusterware Processes (Doc ID 459694.1)
+ Then as per your environment get pstack/procstack of that process in 30 seconds interval for 3-4 times .
If try to identify the issue ,if required please open service request with us.
Regards,
Aritra

Query to find out which process consuming more cpu?

Hi All,
some one please tell me the query to find out which process is consuming more
cpu resources?
Thanks and Regards
Srikanth

Use V$SESSTAT to determine which sessions are using most CPU, and investigate what SQL these users/sessions are executing:
SQL> select ss.sid, se.command, ss.value CPU, se.username, se.program
from v$sesstat ss, v$session se
where ss.statistic# in
(select statistic#
from v$statname
where name = 'CPU used by this session')
and se.sid=ss.sid
order by ss.value desc;

ORACLE dispatcher process running high cpu (100%)

Hi:
I'm running Apex 4 on database Oracle 11g 11.2.0.2.0. The cpu consumption is really high after a while. Oracle Dispatcher process goes 100% cpu for very long time.
Anyone here had the same problem? I'm created more dispatchers to workaround this issue but the problem is not solved. At oracle support seams there's a bug about this issue 14106948, but no solution yet.
Anyone with same problem? Any solution?
Thanks
Ricardo

Your problem may not be exactly the same as that of the original poster of this thread, and it can be very confusing for everybody if we try to answer more than one question in each thread.
In order for us to give your problem our undivided attention to try to solve it, would you kindly start your own thread, describing the trouble you are having in the fullest detail, including completing your details to show what Mac you are using, what operating system, and what version of the application in question.

Which Process using high Swap

Dear All,
Any specific command or steps to find which process consuming lot of swap space and there is any specific step to reduce the usage without kill the actual process.
Regards,
Siva

prstat -s size
..gives you a list of processes sorted on their memory consumption. The swap and memory are tightly connected in a virtual-memory structure, which means that i don't think you can tell exactly how much of a process which is swapped out and how much which is in RAM.
The RSS column of the prstat output shows how much which is residential, that part is for sure in the RAM, the rest may or may not be swapped out.
You can not reduce the amount of swap used by a process (i'ld guess that you probably could force it into the RAM, but thats probably not what you want), but if swap size is an issue, you can add space to the swap easily by using swap -a on a file or device.
.7/M.

Jlaunch process using High CPU, while uploading the files in XI system

Hi,
we are facing jlaunch high cpu usage problems, while uploading the files of more than 25MB, in XI system. PIAFUSER is running on PRIV mode and huge java core dumps and heapdumps are getting generated in server0 node
error message-> - Out of memory situations running XI
Exception thrown [Fri Sep 30 13:57:27,855]:Exception thrown by application running in JCo Server
java.lang.Exception: java.lang.OutOfMemoryError
     at com.sap.engine.services.rfcengine.RFCDefaultRequestHandler.handleRequest(RFCDefaultRequestHandler.java:237)
     at com.sap.engine.services.rfcengine.RFCJCOServer$J2EEApplicationRunnable.run(RFCJCOServer.java:254)
     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(AccessController.java:219)
     at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:104)
     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:176)
first , we tested in Quality system, where,we are getting same problems as well.
SAP Note 146289 - Parameter Recommendations for 64-Bit
increased em/intial_size_MB from 512MB to 2 GB and em/global_area_MB value from 96 to 256
SAP Note 723909 - Java VM settings for J2EE 6.40/7.0
we added some jvm parameters in confitool
-Djava.awt.headless=true
-XX:+UseParNewGC
-XX:+PrintGCTimeStamps
Present JVM values in XQ1 system..
Xmx value 3072
xms value 2048
xmn value 1000
we have tested JCo RFC's AI_DIRECTORY_JCOSERVER and AI_RUNTIME_JCOSERVER , connection test was OK.
We increased parameter com.sap.aii.ib.client.jnlp.j2se.maxheapsize from 512m to 800m
Please advice me.. how to proceed..
regards,
balaram

Hi Balaram,
Kindly review below note, Hope it suits.
716927 - Overview of AIX JVM for NetWeaver 2004 and 7.0 (2004s).
Regards,
Mani

Query to find adhoc queries taking high cpu on server

Hi,
I want to find all the adhoc and other queries consuming high cpu on sql server. sys.dm_exec_cahched_plan will only have cached queries and not the currently running ones.

Hi Preetha7,
According to your description, if you want to identify the most expensive SQL Server queries based on the cumulative CPU cost, you can use the DMVs of the sys.dm_exec_sql_text , the sys.dm_exec_query_plan and sys.dm_exec_query_stats. For example, you can
refer to the following T-SQL statement.
SELECT TOP 20
qs.sql_handle,
qs.execution_count,
qs.total_worker_time AS Total_CPU,
total_CPU_inSeconds = --Converted from microseconds
qs.total_worker_time/1000000,
average_CPU_inSeconds = --Converted from microseconds
(qs.total_worker_time/1000000) / qs.execution_count,
qs.total_elapsed_time,
total_elapsed_time_inSeconds = --Converted from microseconds
qs.total_elapsed_time/1000000,
st.text,
qp.query_plan
FROM
sys.dm_exec_query_stats AS qs
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) AS st
CROSS apply sys.dm_exec_query_plan (qs.plan_handle) AS qp
ORDER BY qs.total_worker_time DESC
Or you can run the "Performance - Top Queries By Total CPU Time" report in SSMS. In addition, you can use SQL Server Extended Events session for troubleshooting the high consumed of CPU time. For more information about finding currently session that is costing
high CPU.
http://social.msdn.microsoft.com/Forums/sqlserver/en-US/cb3e29ca-f1ef-4440-8f1a-db4924a43c5c/find-currently-session-that-is-costing-high-cpu?forum=sqldatabaseengine
http://blogs.msdn.com/b/batala/archive/2011/07/23/troubleshoot-high-cpu-issue-without-using-profile-traces.aspx
Regards,
Sofiya Li
Sofiya Li
TechNet Community Support

Query taking high CPU usage

Hi,
I have a Oracle 9.2 DB with 2 cpu's,when i took a statspack report i found that CPU Time is very hight i,e more that 81%....
one of the query is taking near about 51% CPU Usage...
i.e
SELECT /*+ INDEX (OM_COURSE_FEE OCF_CFC_CODE) */DISTINCT CF_COURSE_CODE   FROM OM_COURSE_FEE,OT_STUDENT_FEE_COL_HEAD,OT_STUDENT_FEE_COL_DETL WHERE SFCH_SYS_ID = SFCD_SFCH_SYS_ID AND
SFCD_FEE_TYPE_CODE = CF_TYPE_CODE AND CF_COURSE_CODE IN ( 'PE1','PE2','CCT','CPT' ) AND SFCH_TXN_CODE = :b1 AND SFCD_SUBSCRBE_JOURNAL_YN IN ( 'T','R','1','C' ) AND SFCH_APPR_UID IS NOT NULL
AND SFCH_APPR_DT IS NOT NULL   AND SFCH_NO = :b2 AND NOT EXISTS (SELECT 'X'   FROM OM_STUDENT_HEAD WHERE STUD_SRN = SFCH_STUD_SRN_TEMP_NO AND NVL(STUD_CLO_STATUS,0) != 1 AND
NVL(STUD_REG_STATUS,0) != 23 AND STUD_COURSE_CODE != 'CCT' AND CF_COURSE_CODE= STUD_COURSE_CODE ) ORDER BY 1 DESCExplain Plan for......
SQL> select * from table(dbms_xplan.display());
PLAN_TABLE_OUTPUT
| Id | Operation                                  | Name
   | Rows | Bytes | Cost | Pstart| Pstop |
|   0 | SELECT STATEMENT                           |
PLAN_TABLE_OUTPUT
   |     1 |    69 |    45 |       |       |
|   1 | SORT UNIQUE                               |
   |     1 |    69 |    27 |       |       |
|   2 |   TABLE ACCESS BY GLOBAL INDEX ROWID       | OT_STUDENT_FEE_COL_DETL
   |     1 |    12 |     2 | ROWID | ROW L |
|   3 |    NESTED LOOPS                            |
   |     1 |    69 |     9 |       |       |
PLAN_TABLE_OUTPUT
|   4 |     NESTED LOOPS                           |
   |     1 |    57 |     7 |       |       |
|   5 |      TABLE ACCESS BY GLOBAL INDEX ROWID    | OT_STUDENT_FEE_COL_HEAD
   |     1 |    48 |     5 | ROWID | ROW L |
|   6 |       INDEX SKIP SCAN                      | OT_STUDENT_FEE_COL_HEAD_UK0
1 |     1 |       |     4 |       |       |
|   7 |      INLIST ITERATOR                       |
   |       |       |       |       |       |
PLAN_TABLE_OUTPUT
|   8 |       TABLE ACCESS BY INDEX ROWID          | OM_COURSE_FEE
   |     1 |     9 |     2 |       |       |
|   9 |        INDEX RANGE SCAN                    | OCF_CFC_CODE
   |     1 |       |     1 |       |       |
| 10 |         FILTER                             |
   |       |       |       |       |       |
| 11 |          TABLE ACCESS BY GLOBAL INDEX ROWID| OM_STUDENT_HEAD
PLAN_TABLE_OUTPUT
   |     1 |    21 |     4 | ROWID | ROW L |
| 12 |           INDEX RANGE SCAN                 | IDM_STUD_SRN_COURSE
   |     1 |       |     3 |       |       |
| 13 |     INDEX RANGE SCAN                       | IDM_SFCD_FEE_TYPE_CODE
   | 34600 |       |     1 |       |       |
PLAN_TABLE_OUTPUT
Note: cpu costing is off, PLAN_TABLE' is old version
21 rows selected.
SQL>Statspack report
DB Name         DB Id    Instance     Inst Num Release     Cluster Host
ai          1372079993 ai11              1 9.2.0.6.0   YES     ai1
              Snap Id     Snap Time      Sessions Curs/Sess Comment
Begin Snap:       175 12-Dec-08 13:21:33 #######        .0
End Snap:       176 12-Dec-08 13:56:09 #######        .0
   Elapsed:               34.60 (mins)
Cache Sizes (end)
~~~~~~~~~~~~~~~~~
               Buffer Cache:     3,264M      Std Block Size:          8K
           Shared Pool Size:       608M          Log Buffer:        977K
Load Profile
~~~~~~~~~~~~                            Per Second       Per Transaction
                  Redo size:              5,727.62             21,658.54
              Logical reads:             16,484.89             62,336.32
              Block changes:                 32.49                122.88
             Physical reads:                200.46                758.03
            Physical writes:                  5.08                 19.23
                 User calls:                 97.43                368.44
                     Parses:                 11.66                 44.11
                Hard parses:                  0.39                  1.48
                      Sorts:                  3.22                 12.19
                     Logons:                  0.02                  0.06
                   Executes:                 36.70                138.77
               Transactions:                  0.26
% Blocks changed per Read:    0.20    Recursive Call %:     28.65
Rollback per transaction %:   20.95       Rows per Sort:    131.16
Instance Efficiency Percentages (Target 100%)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            Buffer Nowait %: 100.00       Redo NoWait %:    100.00
            Buffer Hit   %:   98.79    In-memory Sort %:     99.99
            Library Hit   %:   98.92        Soft Parse %:     96.65
         Execute to Parse %:   68.21         Latch Hit %:     99.98
Parse CPU to Parse Elapsd %:   60.50     % Non-Parse CPU:     99.48
Shared Pool Statistics        Begin   End
             Memory Usage %:   90.06   89.79
    % SQL with executions>1:   72.46   72.46
% Memory for SQL w/exec>1:   69.42   69.51
Top 5 Timed Events
~~~~~~~~~~~~~~~~~~                                                     % Total
Event                                               Waits    Time (s) Ela Time
CPU time                                                        3,337    81.43
db file sequential read                            60,550         300     7.32
global cache cr request                           130,852         177     4.33
db file scattered read                             72,915         101     2.46
db file parallel read                               3,384          75     1.84
Cluster Statistics for DB: ai Instance: ai11 Snaps: 175 -176
Global Cache Service - Workload Characteristics
Ave global cache get time (ms):                            1.3
Ave global cache convert time (ms):                        2.1
Ave build time for CR block (ms):                          0.1
Ave flush time for CR block (ms):                          0.3
Ave send time for CR block (ms):                           0.3
Ave time to process CR block request (ms):                 0.7
Ave receive time for CR block (ms):                        4.9
Ave pin time for current block (ms):                       0.0
Ave flush time for current block (ms):                     0.0
Ave send time for current block (ms):                      0.3
Ave time to process current block request (ms):            0.3
Ave receive time for current block (ms):                   2.8
Global cache hit ratio:                                    1.5
Ratio of current block defers:                             0.0
% of messages sent for buffer gets:                        1.4
% of remote buffer gets:                                   0.1
Ratio of I/O for coherence:                                1.1
Ratio of local vs remote work:                             9.7
Ratio of fusion vs physical writes:                        0.1
Global Enqueue Service Statistics
Ave global lock get time (ms):                             0.8
Ave global lock convert time (ms):                         0.0
Ratio of global lock gets vs global lock releases:         1.1
GCS and GES Messaging statistics
Ave message sent queue time (ms):                          0.4
Ave message sent queue time on ksxp (ms):                  2.7
Ave message received queue time (ms):                      0.2
Ave GCS message process time (ms):                         0.1
Ave GES message process time (ms):                         0.1
% of direct sent messages:                                19.4
% of indirect sent messages:                              43.5
% of flow controlled messages:                            37.1
GES Statistics for DB: ai Instance: ai11 Snaps: 175 -176
Statistic                                    Total   per Second    per Trans
dynamically allocated gcs resourc                0          0.0          0.0
dynamically allocated gcs shadows                0          0.0          0.0
flow control messages received                   0          0.0          0.0
flow control messages sent                       0          0.0          0.0
gcs ast xid                                      0          0.0          0.0
gcs blocked converts                         1,231          0.6          2.2
gcs blocked cr converts                      2,432          1.2          4.4
gcs compatible basts                             0          0.0          0.0
gcs compatible cr basts (global)               658          0.3          1.2
gcs compatible cr basts (local)             57,822         27.9        105.3
gcs cr basts to PIs                              0          0.0          0.0
gcs cr serve without current lock                0          0.0          0.0
gcs error msgs                                   0          0.0          0.0
gcs flush pi msgs                              821          0.4          1.5
gcs forward cr to pinged instance                0          0.0          0.0
gcs immediate (compatible) conver              448          0.2          0.8
gcs immediate (null) converts                1,114          0.5          2.0
gcs immediate cr (compatible) con           42,094         20.3         76.7
gcs immediate cr (null) converts           396,284        190.9        721.8
gcs msgs process time(ms)                   42,220         20.3         76.9
gcs msgs received                          545,133        262.6        993.0
gcs out-of-order msgs                            5          0.0          0.0
gcs pings refused                                1          0.0          0.0
gcs queued converts                              0          0.0          0.0
gcs recovery claim msgs                          0          0.0          0.0
gcs refuse xid                                   0          0.0          0.0
gcs retry convert request                        0          0.0          0.0
gcs side channel msgs actual                 2,397          1.2          4.4
gcs side channel msgs logical              232,024        111.8        422.6
gcs write notification msgs                     15          0.0          0.0
gcs write request msgs                         278          0.1          0.5
gcs writes refused                               1          0.0          0.0
ges msgs process time(ms)                    4,873          2.3          8.9
ges msgs received                           39,769         19.2         72.4
global posts dropped                             0          0.0          0.0
global posts queue time                          0          0.0          0.0
global posts queued                              0          0.0          0.0
global posts requested                           0          0.0          0.0
global posts sent                                0          0.0          0.0
implicit batch messages received            39,098         18.8         71.2
implicit batch messages sent                33,386         16.1         60.8
lmd msg send time(ms)                          635          0.3          1.2
lms(s) msg send time(ms)                         2          0.0          0.0
messages flow controlled                   196,546         94.7        358.0
messages received actual                   182,783         88.0        332.9
messages received logical                  584,848        281.7      1,065.3
messages sent directly                     102,657         49.4        187.0
messages sent indirectly                   230,329        110.9        419.5
msgs causing lmd to send msgs                9,169          4.4         16.7
msgs causing lms(s) to send msgs             3,347          1.6          6.1
msgs received queue time (ms)              142,759         68.8        260.0
msgs received queued                       584,818        281.7      1,065.2
msgs sent queue time (ms)                   99,300         47.8        180.9
msgs sent queue time on ksxp (ms)          608,239        293.0      1,107.9
msgs sent queued                           230,391        111.0        419.7
msgs sent queued on ksxp                   229,013        110.3        417.1
GES Statistics for DB: ai Instance: ai11 Snaps: 175 -176
Statistic                                    Total   per Second    per Trans
process batch messages received             65,059         31.3        118.5
process batch messages sent                 50,959         24.5         92.8
Wait Events for DB: ai Instance: ai11 Snaps: 175 -176
-> s - second
-> cs - centisecond -     100th of a second
-> ms - millisecond -    1000th of a second
-> us - microsecond - 1000000th of a second
-> ordered by wait time desc, waits desc (idle events last)
                                                                   Avg
                                                     Total Wait   wait    Waits
Event                               Waits   Timeouts   Time (s)   (ms)     /txn
db file sequential read            60,550          0        300      5    110.3
global cache cr request           130,852        106        177      1    238.3
db file scattered read             72,915          0        101      1    132.8
db file parallel read               3,384          0         75     22      6.2
latch free                          7,253      1,587         52      7     13.2
enqueue                            44,947          0         16      0     81.9
log file parallel write             2,140          0          6      3      3.9
db file parallel write                341          0          5     14      0.6
global cache open x                 1,134          3          4      4      2.1
CGS wait for IPC msg              166,993    164,390          4      0    304.2
library cache lock                  3,169          0          3      1      5.8
log file sync                         494          0          3      5      0.9
row cache lock                        702          0          3      4      1.3
DFS lock handle                     6,900          0          2      0     12.6
control file parallel write           689          0          2      3      1.3
control file sequential read        2,785          0          2      1      5.1
wait for master scn                   687          0          2      2      1.3
global cache null to x                699          0          2      2      1.3
global cache s to x                   778          5          1      2      1.4
direct path write                     148          0          0      3      0.3
SQL*Net more data to client         3,621          0          0      0      6.6
global cache open s                   149          0          0      2      0.3
library cache pin                      78          0          0      2      0.1
ksxr poll remote instances          3,536      2,422          0      0      6.4
LGWR wait for redo copy                12          6          0      9      0.0
buffer busy waits                      23          0          0      5      0.0
direct path read                        9          0          0     10      0.0
buffer busy global CR                   5          0          0     17      0.0
SQL*Net break/reset to clien          172          0          0      0      0.3
global cache quiesce wait               4          1          0      7      0.0
KJC: Wait for msg sends to c           86          0          0      0      0.2
BFILE get length                       67          0          0      0      0.1
global cache null to s                  9          0          0      1      0.0
BFILE open                              6          0          0      0      0.0
BFILE read                             60          0          0      0      0.1
BFILE internal seek                    60          0          0      0      0.1
BFILE closure                           6          0          0      0      0.0
cr request retry                        4          4          0      0      0.0
SQL*Net message from client       201,907          0    180,583    894    367.8
gcs remote message                171,236     43,749      3,975     23    311.9
ges remote message                 79,324     40,722      2,017     25    144.5
SQL*Net more data from clien          447          0          9     21      0.8
SQL*Net message to client         201,901          0          0      0    367.8
Background Wait Events for DB: ai Instance: ai11 Snaps: 175 -176
-> ordered by wait time desc, waits desc (idle events last)
                                                                   Avg
                                                     Total Wait   wait    Waits
Event                               Waits   Timeouts   Time (s)   (ms)     /txn
enqueue                            44,666          0         16      0     81.4
latch free                          4,895        108          6      1      8.9
log file parallel write             2,140          0          6      3      3.9
db file parallel write                341          0          5     14      0.6
CGS wait for IPC msg              166,969    164,366          4      0    304.1
DFS lock handle                     6,900          0          2      0     12.6
control file parallel write           689          0          2      3      1.3
control file sequential read        2,733          0          2      1      5.0
wait for master scn                   687          0          2      2      1.3
ksxr poll remote instances          3,528      2,419          0      0      6.4
LGWR wait for redo copy                12          6          0      9      0.0
db file sequential read                 7          0          0      9      0.0
global cache null to x                 26          0          0      2      0.0
global cache open x                    16          0          0      1      0.0
global cache cr request                 1          0          0      0      0.0
rdbms ipc message                  28,636     20,600     16,937    591     52.2
gcs remote message                171,254     43,746      3,974     23    311.9
pmon timer                            708        686      2,022   2856      1.3
ges remote message                 79,305     40,719      2,017     25    144.5
smon timer                            125          0      1,972 15776      0.2
SQL ordered by Gets for DB: ai Instance: ai11 Snaps: 175 -176
-> End Buffer Gets Threshold:     10000
-> Note that resources reported for PL/SQL includes the resources used by
   all SQL statements called within the PL/SQL code. As individual SQL
   statements are also reported, it is possible and valid for the summed
   total % to exceed 100
                                                     CPU      Elapsd
Buffer Gets    Executions Gets per Exec %Total Time (s) Time (s) Hash Value
     17,503,305           84      208,372.7   51.1   676.25   1218.80   17574787
SELECT /*+ INDEX (OM_COURSE_FEE OCF_CFC_CODE) */DISTINCT CF_COU
RSE_CODE   FROM OM_COURSE_FEE,OT_STUDENT_FEE_COL_HEAD,OT_STUDENT
FEECOL_DETL WHERE SFCH_SYS_ID = SFCD_SFCH_SYS_ID AND SFCD_FE
E_TYPE_CODE = CF_TYPE_CODE AND CF_COURSE_CODE IN ( 'PE1','PE2',
'CCT','CPT' ) AND SFCH_TXN_CODE = :b1 AND SFCD_SUBSCRBE_JOURNA

user00726 wrote:
somw of the changes that have been done....
cai11_lmd0_15771.trc.
Thu Oct 2 13:35:48 2008
CKPT: Begin resize of buffer pool 3 (DEFAULT for block size 8192)
CKPT: Current size = 2512 MB, Target size = 3072 MB
CKPT: Resize completed for buffer pool DEFAULT for blocksize 8192
Thu Oct 2 13:35:50 2008
ALTER SYSTEM SET db_cache_size='3072M' SCOPE=BOTH SID='icai11';
Thu Oct 2 14:04:34 2008
ALTER SYSTEM SET sga_max_size='5244772679680' SCOPE=SPFILE SID='*';
ALTER SYSTEM SET sga_max_size='5244772679680' SCOPE=SPFILE SID='*';
Thu Oct 2 15:24:14 2008
CKPT: Begin resize of buffer pool 3 (DEFAULT for block size 8192)
CKPT: Current size = 3072 MB, Target size = 2512 MB
CKPT: Resize completed for buffer pool DEFAULT for blocksize 8192
Thu Oct 2 15:24:20 2008
ALTER SYSTEM SET db_cache_size='2512M' SCOPE=BOTH SID='icai11';
Thu Oct 2 15:32:33 2008
CKPT: Begin resize of buffer pool 3 (DEFAULT for block size 8192)
CKPT: Current size = 2512 MB, Target size = 3072 MB
CKPT: Resize completed for buffer pool DEFAULT for blocksize 8192
Thu Oct 2 15:32:34 2008
ALTER SYSTEM SET db_cache_size='3072M' SCOPE=BOTH SID='icai11';
Thu Oct 2 15:36:46 2008
ALTER SYSTEM SET shared_pool_size='640M' SCOPE=BOTH SID='icai11';
Thu Oct 2 16:33:52 2008
CKPT: Begin resize of buffer pool 3 (DEFAULT for block size 8192)
CKPT: Current size = 3072 MB, Target size = 2512 MB
CKPT: Resize completed for buffer pool DEFAULT for blocksize 8192
Thu Oct 2 16:33:56 2008
ALTER SYSTEM SET db_cache_size='2512M' SCOPE=BOTH SID='icai11';
Thu Oct 2 16:39:30 2008
ALTER SYSTEM SET pga_aggregate_target='750M' SCOPE=BOTH SID='icai11';Just to make certain that I am not missing anything, if the above you set (all scaled to GB just for the sake of comparison):
sga_max_size=4885GB
db_cache_size=3GB
shared_pool_size=0.625GB
pga_aggregate_target=0.733GB
The SQL statement is forcing the use of a specific index, is this the best index?:
SELECT /*+ INDEX (OM_COURSE_FEE OCF_CFC_CODE) */DISTINCT CF_COURSE_CODE FROM OM_COURSE_FEE,OT_STUDENT_FEE_COL_HEAD,OT_STUDENT_FEE_COL_DETL WHERE SFCH_SYS_ID = SFCD_SFCH_SYS_ID AND
SFCD_FEE_TYPE_CODE = CF_TYPE_CODE AND CF_COURSE_CODE IN ( 'PE1','PE2','CCT','CPT' ) AND SFCH_TXN_CODE = :b1 AND SFCD_SUBSCRBE_JOURNAL_YN IN ( 'T','R','1','C' ) AND SFCH_APPR_UID IS NOT NULL
AND SFCH_APPR_DT IS NOT NULL AND SFCH_NO = :b2 AND NOT EXISTS (SELECT 'X' FROM OM_STUDENT_HEAD WHERE STUD_SRN = SFCH_STUD_SRN_TEMP_NO AND NVL(STUD_CLO_STATUS,0) != 1 AND
NVL(STUD_REG_STATUS,0) != 23 AND STUD_COURSE_CODE != 'CCT' AND CF_COURSE_CODE= STUD_COURSE_CODE ) ORDER BY 1 DESC
Unfortunately, explain plans, even with dbms_xplan.display, may not show the actual execution plan - this is more of a problem when the SQL statement includes bind variables (capturing a 10046 trace at level 8 or 12 will help). With the information provided, it looks like the problem is with the number of logical reads performed: 17,503,305 in 84 executions = 208,373 logical reads per execution. Something is causing the SQL statement to execute inefficiently, possibly a join problem between tables, possibly the forced use of an index.
From one of my previous posts related to this same SQL statement:
SELECT /*+ INDEX (OM_COURSE_FEE OCF_CFC_CODE) */ DISTINCT
CF_COURSE_CODE
FROM
OM_COURSE_FEE,
OT_STUDENT_FEE_COL_HEAD,
OT_STUDENT_FEE_COL_DETL
WHERE
SFCH_SYS_ID = SFCD_SFCH_SYS_ID
AND SFCD_FEE_TYPE_CODE = CF_TYPE_CODE
AND CF_COURSE_CODE IN ( 'PE1','PE2','CCT','CPT' )
AND SFCH_TXN_CODE = :b1
AND SFCD_SUBSCRBE_JOURNAL_YN IN ( 'T','R','1','C' )
AND SFCH_APPR_UID IS NOT NULL
AND SFCH_APPR_DT IS NOT NULL
AND SFCH_NO = :b2
AND NOT EXISTS (
    SELECT
      'X'
    FROM
      OM_STUDENT_HEAD
    WHERE
      STUD_SRN = SFCH_STUD_SRN_TEMP_NO
      AND NVL(STUD_CLO_STATUS,0) != 1
      AND NVL(STUD_REG_STATUS,0) != 23
      AND STUD_COURSE_CODE != 'CCT'
      AND CF_COURSE_CODE = STUD_COURSE_CODE)
ORDER BY
1 DESC
| Id | Operation                                  | Name                     | Rows | Bytes | Cost | Pstart| Pstop |
|   0 | SELECT STATEMENT                                                             1      69      34
|   1 | SORT UNIQUE                                                                 1      69      22
|   2 |   TABLE ACCESS BY GLOBAL INDEX ROWID       | OT_STUDENT_FEE_COL_DETL   |     1 |    12 |     2 | ROWID | ROW L |
|   3 |    NESTED LOOPS                                                              1      69       9
|   4 |     NESTED LOOPS                                                             1      57       7
|   5 |      TABLE ACCESS BY GLOBAL INDEX ROWID    | OT_STUDENT_FEE_COL_HEAD   |     1 |    48 |     5 | ROWID | ROW L |
|   6 |       INDEX SKIP SCAN                       OT_STUDENT_FEE_COL_HEAD_UK0|     1 |     1 |     4 |
|   7 |      INLIST ITERATOR                       |
|   8 |       TABLE ACCESS BY INDEX ROWID          | OM_COURSE_FEE             |     1 |     9 |     2 |       |       |
|   9 |        INDEX RANGE SCAN                    | OCF_CFC_CODE              |     1 |       |     1 |       |       |
| 10 |         FILTER
| 11 |          TABLE ACCESS BY GLOBAL INDEX ROWID| OM_STUDENT_HEAD           |     1 |    21 |     4 | ROWID | ROW L |
| 12 |           INDEX RANGE SCAN                 | IDM_STUD_SRN_COURSE       |     1 |       |     3 |       |       |
| 13 |     INDEX RANGE SCAN                       | IDM_SFCD_FEE_TYPE_CODE    | 34600 |       |     1 |       |       |It appears, based just on the SQL statement, that there is no direct relationship between OM_COURSE_FEE and OT_STUDENT_FEE_COL_HEAD, yet the plan above indicates that the two tables are being joined together, likely as a result of the index hint. There is the possibility of additional predicates being generated by Oracle which will make this possible without introducing a Cartesian join, but those predicates are not displayed with an explain plan (they will appear with a DBMS_XPLAN). I may not be remembering correctly, but if the optimizer goal is set to first rows, a Cartesian join might appear in a plan as a nested loops join - Jonathan will know for certain if that is the case.
Have you investigated the above as a possible cause? If you know that there is a problem with this one SQL statement, a 10046 trace at level 8 or 12 is much more helpful than a Statspack report.
Charles Hooper
IT Manager/Oracle DBA
K&M Machine-Fabricating, Inc.

Java Process with High CPU

I have a java process running on HP-UX with a 1.4.2 JVM. This program is using some third-party code (quartz) to act as a batch scheduler similar to cron. When running in production, the process runs fine for several days and then starts maxing out the CPU. The server has 8 cpu's and the last time the problem occured, 4 of the cpu's were 100% in use with this process.
I've tried sending a "kill -3 pid" but I can't seem to get a thread dump. I've eventually gotten some 700Meg core files. Is there anyway to use these core files to tell me what is going on?
Any ideas on how to trouble shoot this problem? We've used some profilers but we can't duplicate the problem on test servers so we aren't learning anything new.
Thanks,
Brian

Try pstack to read the stacks of the threads in the process.
Try pldd to determine the shared libraries in the process then
use truss to trace calls in any of these libraries to determine where
the cycles are being spent.

Which process taking high CPU

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