Impact of creating a non-clusterd index on a huge transaction table?

Hello Everyone,
We have a transaction table containing 10 million records and everyday a million records will be inserted. We don’t have any clustered index on this table as this is a transaction table (more than 10 columns to uniquely identify a row). We
do have some SPs which in turn some reports getting generated using this table. In order to improve the performance of an SP, we created a non-clustered index on this table and we found a huge performance gain.
Here comes my question - will this (creation of non-clustered index) impacts my table data load performance or other reports generation?
Any suggestions will be appreciated.
Many Thanks!
Rajasekhar.

Hello Rajasekhar,
First identify this table and corresponding columns usage. Through SP_depends system procedure you can identify this table dependencies.
Then look at complex queries and it's execution plans. You can get an output recommendations of appropriate missing indexes.
Now you can try to create appropriate indexes. Always I suggest you to limit the index count if you are inserting/updating large volume records. Also if possible create clustered index.
One more option, you can horizontally partitioned the table and move data to multiple filegroups. Based of range of data your query performance also improve a lot.
To apply partition for existing table, you should take backup and recreate from scartch.
Check this link : http://www.mssqltips.com/sqlservertip/2888/how-to-partition-an-existing-sql-server-table/
Best Regards,
Ashokkumar.
Ashokkumar

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Jozsef wrote:
Hi there,
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|   2 |   SORT CREATE INDEX    |       | 10000 | 40000 |            |          |
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amitavachatterjee1975 wrote:
Hi Gurus,
I'm getting lots of "TABLE ACCESS FULL" for lots of columns which have non-unique indexes is some queries. So my question is does optimizer does not pick up non-unique index but only pickes up unique indexes for those columns.
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Amitava.WHY MY INDEX IS NOT BEING USED
http://communities.bmc.com/communities/docs/DOC-10031
http://searchoracle.techtarget.com/tip/Why-isn-t-my-index-getting-used
http://www.orafaq.com/tuningguide/not%20using%20index.html

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Why does it say:
can't be created with non-existent Pool
Thanks,

Add "Targets" attribute to the connection pool. You may
get an idea how it looks like by searching config.xml
for "targets". If target servers are not set, the pool won't be
deployed and can not be used to a create datasource.
Regards,
Slava Imeshev
"BBaker" <[email protected]> wrote in message
news:[email protected]...
I am wanting to use an Oracle 9i with WebLogic 7
I have the following in my config.xml:
<JDBCConnectionPool DriverName="oracle.jdbc.driver.OracleDriver"
Name="Thin.Pool" Password="{3DES}C3xDZIWIABA="
Properties="user=SYSTEM" TestTableName="OID"
URL="jdbc:oracle:thin:@localhost:1521:DB_SID"/>
<JDBCDataSource JNDIName="DB_DS" Name="DB_DS" PoolName="Thin.Pool"/>
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####<Mar 31, 2003 6:33:45 PM MST> <Info> <HTTP> <blue> <GameServe>
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identity> <> <001082> <Creating Data Source named DB_DS for pool
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<ExecuteThread: '1' for queue: '__weblogic_admin_html_queue'> <kernel
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atweblogic.jdbc.common.internal.JdbcInfo.validateConnectionPool(JdbcInfo.java:
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3)
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nImpl.java:419)
atcom.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1557)
atcom.sun.management.jmx.MBeanServerImpl.invoke(MBeanServerImpl.java:1525)
atweblogic.management.internal.RemoteMBeanServerImpl.invoke(RemoteMBeanServerI
mpl.java:952)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:470)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:198)
at $Proxy16.addDeployment(Unknown Source)
atweblogic.management.internal.DynamicMBeanImpl.unprotectedUpdateDeployments(D
ynamicMBeanImpl.java:1784)
atweblogic.management.internal.DynamicMBeanImpl.access$0(DynamicMBeanImpl.java
:1737)
atweblogic.management.internal.DynamicMBeanImpl$1.run(DynamicMBeanImpl.java:17
15)
atweblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:780)
atweblogic.management.internal.DynamicMBeanImpl.updateDeployments(DynamicMBean
Impl.java:1711)
atweblogic.management.internal.DynamicMBeanImpl.setAttribute(DynamicMBeanImpl.
java:1035)
atweblogic.management.internal.ConfigurationMBeanImpl.setAttribute(Configurati
onMBeanImpl.java:353)
atcom.sun.management.jmx.MBeanServerImpl.setAttribute(MBeanServerImpl.java:135
8)
atcom.sun.management.jmx.MBeanServerImpl.setAttribute(MBeanServerImpl.java:133
3)
atweblogic.management.internal.RemoteMBeanServerImpl.setAttribute(RemoteMBeanS
erverImpl.java:898)
atweblogic.management.internal.MBeanProxy.setAttribute(MBeanProxy.java:324)
at weblogic.management.internal.MBeanProxy.invoke(MBeanProxy.java:193)
at $Proxy13.setTargets(Unknown Source)
at java.lang.reflect.Method.invoke(Native Method)
atweblogic.management.console.info.FilteredMBeanAttribute.doSet(FilteredMBeanA
ttribute.java:92)
atweblogic.management.console.actions.mbean.DoEditMBeanAction.perform(DoEditMB
eanAction.java:145)
atweblogic.management.console.actions.internal.ActionServlet.doAction(ActionSe
rvlet.java:171)
atweblogic.management.console.actions.internal.ActionServlet.doPost(ActionServ
let.java:85)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
atweblogic.servlet.internal.ServletStubImpl$ServletInvocationAction.run(Servle
tStubImpl.java:1058)
atweblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:401)
atweblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java
:306)
atweblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(W
ebAppServletContext.java:5445)
atweblogic.security.service.SecurityServiceManager.runAs(SecurityServiceManage
r.java:780)
atweblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletCo
ntext.java:3105)
atweblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java
:2588)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:213)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:189)
Why does it say:
can't be created with non-existent Pool
Thanks,

Impact of creating a non-clusterd index on a huge transaction table?

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