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How to calculate Index creation time [message #649781] Wed, 06 April 2016 04:35 Go to next message
hitesh.bhatt
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Registered: February 2014
Location: INDIA
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Hi,

Can anyone please help me with approximate time to create an Index on table with 1 Million records?

[As I have totally 60 tables with huge data. (Most of tables with more than 10 Million re[cords)]

Thanks in advance.
Regards,
Hitesh
Re: How to calculate Index creation time [message #649782 is a reply to message #649781] Wed, 06 April 2016 04:45 Go to previous messageGo to next message
cookiemonster
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Depends on the hardware, on decent hardware it should take seconds.
Re: How to calculate Index creation time [message #649783 is a reply to message #649781] Wed, 06 April 2016 04:52 Go to previous messageGo to next message
Michel Cadot
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10 millions records is not huge. I use this number for some tests on my laptop.

Re: How to calculate Index creation time [message #649784 is a reply to message #649783] Wed, 06 April 2016 04:53 Go to previous messageGo to next message
hitesh.bhatt
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Thanks for quick reply, so can I approximately take 10 Millions will take around 5 minutes ?
Re: How to calculate Index creation time [message #649786 is a reply to message #649784] Wed, 06 April 2016 04:54 Go to previous messageGo to next message
Michel Cadot
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No you can't.
You have to make a test on the target system.

Re: How to calculate Index creation time [message #649787 is a reply to message #649786] Wed, 06 April 2016 04:56 Go to previous messageGo to next message
hitesh.bhatt
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Ok, As I only have to provide them approximate time. So need to know the average time it takes for 10 million records in general?
Re: How to calculate Index creation time [message #649789 is a reply to message #649787] Wed, 06 April 2016 04:59 Go to previous messageGo to next message
Michel Cadot
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How much time it takes in general to go from New-York to Washington?

[Updated on: Wed, 06 April 2016 04:59]

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Re: How to calculate Index creation time [message #649790 is a reply to message #649789] Wed, 06 April 2016 05:05 Go to previous messageGo to next message
cookiemonster
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As I said above this depends on the hardware more than anything. If you've got fast hardware it'll be fast, if not it'll be slow. So there's no generic average time to be given.
Re: How to calculate Index creation time [message #649792 is a reply to message #649790] Wed, 06 April 2016 05:21 Go to previous messageGo to next message
hitesh.bhatt
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Ok let me test on development, Thanks
Re: How to calculate Index creation time [message #649795 is a reply to message #649792] Wed, 06 April 2016 06:47 Go to previous messageGo to next message
Michel Cadot
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Which gives you nothing if you have not the same hardware and concurrent workload than in production.

Re: How to calculate Index creation time [message #649804 is a reply to message #649781] Wed, 06 April 2016 10:44 Go to previous messageGo to next message
bpeasland
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Registered: February 2015
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The only way to know the answer is to actually run the commands in your environment, on your hardware, with your configuration, with your data.


Cheers,
Brian
Re: How to calculate Index creation time [message #649856 is a reply to message #649781] Sat, 09 April 2016 13:22 Go to previous message
LNossov
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Registered: July 2011
Location: Germany
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Creation time depends on the creation method. If you use pdml with the appropriate degree, it should be fast. If not it is slower. You can use explain plan for create index command and dbms_xplan.display to estimate the size of the index (but not the creation time, s. above).
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