Database Vs Application

Hello Everyone,
As a DBA, when application user complains application is running slow.
1.     What queries you run against database?
2.     What do you look in them?
3. How do you determine it’s not database it’s application that is running slow?
BANNER
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
PL/SQL Release 11.2.0.2.0 - Production
CORE    11.2.0.2.0      Production
TNS for IBM/AIX RISC System/6000: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 - ProductionEdited by: user3636719 on Mar 15, 2012 11:48 AM

user3636719 wrote:
As a DBA, when application user complains application is running slow.
1.     What queries you run against database?
2.     What do you look in them?
3. How do you determine it’s not database it’s application that is running slow?You have just come up with the primary reason and justification for the Diagnostics Pack.

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    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.1.0) ].server.http.AJPRequestHandler.run(AJPRequestHandler.java:302)
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    at oracle.oc4j.network.ServerSocketReadHandler$SafeRunnable.run(ServerSocketReadHandler.java:260)
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    at oracle.jbo.pool.ResourcePool.useResource(ResourcePool.java:326)
    at oracle.jbo.server.ConnectionPool.getConnectionInternal(ConnectionPool.java:87)
    at oracle.jbo.server.ConnectionPool.getConnection(ConnectionPool.java:66)
    at oracle.jbo.server.ConnectionPoolManagerImpl.getConnection(ConnectionPoolManagerImpl.java:56)
    at oracle.jbo.server.DBTransactionImpl.establishNewConnection(DBTransactionImpl.java:911)
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    at oracle.jbo.server.DBTransactionImpl.initTxn(DBTransactionImpl.java:5891)
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    at oracle.jbo.common.ampool.DefaultConnectionStrategy.connect(DefaultConnectionStrategy.java:194)
    at oracle.jbo.server.ApplicationPoolMessageHandler.doPoolConnect(ApplicationPoolMessageHandler.java:454)
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    at oracle.jbo.common.ampool.ApplicationPoolImpl.prepareApplicationModule(ApplicationPoolImpl.java:2161)
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    at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:453)
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    at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:424)
    at oracle.jbo.common.ampool.SessionCookieImpl.useApplicationModule(SessionCookieImpl.java:419)
    at oracle.adf.model.bc4j.DCJboDataControl.rebuildApplicationModule(DCJboDataControl.java:1536)
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    at oracle.adf.model.binding.DCUtil.findContextObject(DCUtil.java:383)
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    at oracle.jbo.uicli.binding.JUIteratorDef.createIterBinding(JUIteratorDef.java:51)
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    at oracle.adf.model.binding.DCBindingContainerDef.createBindingContainer(DCBindingContainerDef.java:425)
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    at oracle.adf.model.BindingContext.get(BindingContext.java:483)
    at oracle.adf.model.BindingContext.findBindingContainer(BindingContext.java:313)
    at oracle.adf.model.BindingContext.findBindingContainerByPath(BindingContext.java:633)
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    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.1.0) ].server.http.ServletRequestDispatcher.invoke(ServletRequestDispatcher.java:619)
    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.1.0) ].server.http.ServletRequestDispatcher.forwardInternal(ServletRequestDispatcher.java:368)
    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.1.0) ].server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:866)
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    ## Detail 0 ##
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    at oracle.jbo.pool.ResourcePool.createResource(ResourcePool.java:536)
    at oracle.jbo.pool.ResourcePool.useResource(ResourcePool.java:326)
    at oracle.jbo.server.ConnectionPool.getConnectionInternal(ConnectionPool.java:87)
    at oracle.jbo.server.ConnectionPool.getConnection(ConnectionPool.java:66)
    at oracle.jbo.server.ConnectionPoolManagerImpl.getConnection(ConnectionPoolManagerImpl.java:56)
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    at oracle.jbo.server.DBTransactionImpl.initTransaction(DBTransactionImpl.java:1156)
    at oracle.jbo.server.DBTransactionImpl.initTxn(DBTransactionImpl.java:5891)
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    at oracle.jbo.common.ampool.DefaultConnectionStrategy.connect(DefaultConnectionStrategy.java:194)
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    at oracle.jbo.server.ApplicationPoolMessageHandler.doPoolMessage(ApplicationPoolMessageHandler.java:343)
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    at oracle.jbo.common.ampool.ApplicationPoolImpl.sendPoolMessage(ApplicationPoolImpl.java:4074)
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    at com.evermind[Oracle Containers for J2EE 10g (10.1.3.1.0) ].server.http.HttpRequestHandler.doProcessRequest(HttpRequestHandler.java:866)
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    ## Detail 0 ##
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