Join taking lot of time.? How can we improve performance?

Hi,
I am having tow sources SRC_A and SRC_B.
I am applying full outer join between the 2 sources.
Here SRC_A contains 2 fields. It contains 8 Crore records.
and SRC_B contains 2 fields. It contains 8 Crore records.
I am having temp table space is of 500 GB. and Undo Table space is of 250GB.
I am getting Roll back segment error.
It didn't insert a single recornd in the target table.
Could anyone please suggest me?
Am I missing anything? What all things I can do to improve the performance.
Thank you,
Regards,
Gowtham Sen.

you need to provide your oracle version, ora-xxxxx error code, formatted([ pre ] tags) source code and explain plan output at least to get more help here.
alter session set statistics_level = all ;
explain plan set statement_id = 'demo' into plan_table for SELECT ..
SELECT PLAN_TABLE_OUTPUT FROM TABLE(dbms_xplan.display_cursor(null, null, 'allstats last'));here are some examples.
http://psoug.org/reference/explain_plan.html
http://coskan.wordpress.com/2007/03/04/viewing-explain-plan/
Also autotrace option or sql trace+tkprof will provide the informations needed.
http://www.bhatipoglu.com/entry/17/oracle-performance-analysis-tracing-and-performance-evaluation
If this is a snapshot too old error please mention undo management settings.

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Himanshu,
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[http://www.precisejava.com/javaperf/j2ee/JDBC.htm#JDBC114]
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Fetch small amount of data iteratively instead of fetching whole data at once
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Hello,
I just deployed one Cisco SA540 and three SA520s.
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The three SA520s are the the spoke sites.
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Upstream Speed: 9.4 Mbps
Spoke Site#1:
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My short experience with the Cisco Small Business Support Center has not been as great at all.
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I would hate to dismiss SA5xx series without making sure it is not just a simple configuration setting.

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I agree!. My partner wants to just replace the SA5xxs with ASAs, as we have never had problems with ASA vpn performance.
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Things You Can Do To Resolve Slow Downs
If your computer seems to be running slower here are some things you can do:
Start with a visit to: OS X Maintenance - MacAttorney.
Boot into Safe Mode then repair your hard drive and permissions:
Repair the Hard Drive and Permissions Pre-Lion
Boot from your OS X Installer disc. After the installer loads select your language and click on the Continue button. When the menu bar appears select Disk Utility from the Utilities menu. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the installer.
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Repair the Hard Drive - Lion
Boot from your Lion Recovery HD. When the recovery menu appears select Disk Utility. After DU loads select your hard drive entry (mfgr.'s ID and drive size) from the the left side list. In the DU status area you will see an entry for the S.M.A.R.T. status of the hard drive. If it does not say "Verified" then the hard drive is failing or failed. (SMART status is not reported on external Firewire or USB drives.) If the drive is "Verified" then select your OS X volume from the list on the left (sub-entry below the drive entry,) click on the First Aid tab, then click on the Repair Disk button. If DU reports any errors that have been fixed, then re-run Repair Disk until no errors are reported. If no errors are reported, then click on the Repair Permissions button. Wait until the operation completes, then quit DU and return to the main menu. Select Restart from the Apple menu.
Boot to the Recovery HD:
Restart the computer and after the chime press and hold down the COMMAND and R keys until the menu screen appears. Alternatively, restart the computer and after the chime press and hold down the OPTION key until the boot manager screen appears. Select the Recovery HD and click on the downward pointing arrow button.
Restart your computer normally and see if this has helped any. Next do some maintenance:
Suggestions for OS X Maintenance
For situations Disk Utility cannot handle the best third-party utility is Disk Warrior; DW only fixes problems with the disk directory, but most disk problems are caused by directory corruption; Disk Warrior 4.x is now Intel Mac compatible.
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OS X automatically defragments files less than 20 MBs in size, so unless you have a disk full of very large files there's little need for defragmenting the hard drive. As for virus protection there are few if any such animals affecting OS X. You can protect the computer easily using the freeware Open Source virus protection software ClamXAV. Personally I would avoid most commercial anti-virus software because of their potential for causing problems. For more about malware see Macintosh Virus Guide.
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When you install any new system software or updates be sure to repair the hard drive and permissions beforehand.
Get an external Firewire drive at least equal in size to the internal hard drive and make (and maintain) a bootable clone/backup. You can make a bootable clone using the Restore option of Disk Utility. You can also make and maintain clones with good backup software. My personal recommendations are (order is not significant):
1. Carbon Copy Cloner
2. Data Backup
3. Deja Vu
4. SuperDuper!
5. SyncTwoFolders
6. Synk Pro
7. Synk Standard
8. Tri-Backup
Visit The XLab FAQs and read the FAQs on maintenance, optimization, virus protection, and backup and restore.
Additional suggestions will be found in Mac maintenance Quick Assist.
Referenced software can be found at CNet Downloads or MacUpdate.
Additional Hints
Be sure you have an adequate amount of RAM installed for the number of applications you run concurrently. Be sure you leave a minimum of 10% of the hard drive's capacity as free space.
Add more RAM. If your computer has less than 2 GBs of RAM and you are using OS X Leopard or later, then you can do with more RAM. Snow Leopard and Lion work much better with 4 GBs of RAM than their system minimums. The more concurrent applications you tend to use the more RAM you should have.
Always maintain at least 15 GBs or 10% of your hard drive's capacity as free space, whichever is greater. OS X is frequently accessing your hard drive, so providing adequate free space will keep things from slowing down.
Check for applications that may be hogging the CPU:
Open Activity Monitor in the Utilities folder. Select All Processes from the Processes dropdown menu. Click twice on the CPU% column header to display in descending order. If you find a process using a large amount of CPU time, then select the process and click on the Quit icon in the toolbar. Click on the Force Quit button to kill the process. See if that helps. Be sure to note the name of the runaway process so you can track down the cause of the problem.
Often this problem occurs because of a corrupted cache or preferences file or an attempt to write to a corrupted log file.

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Try this:
public static boolean areImagesIdentical(File file1, File file2) throws IOException {
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Extractor taking lots of time.

hi experts,
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but its taking lots of time.how can i solve this problem.
any help appreciated.

Hi,
Have you done any enhancements(Append) to this DS.If so, make sure that code is performance optimistic.
Basically the setup table for 2LIS_13_VDKON will has the lot of data. For example, it holds at n avarage 10 records for each billing item record.
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Anil Kumar Sharma .P

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Sounds like a hardware issue.
Did you buy the system from Apple? If so how recent is recent? If it is new you have 14 days to return it, not sure what the situation is with refurb systems. If it is over 14 days you should still have warranty support make an appointment at an Apple Store or contact Apple support.
If you bought it from someone other then Apple you will need to contact them.
good luck
regards

How do I cancel downloading Mountain Lion as it is taking **** lot of time.

I made a purchase request to AppStore for Mountain Lion.
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Nishigandh
Message was edited by: Nishigandh

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