How should be set Index block size in Warehouse databases?
Hi,
We have Warehouse database.
I cannot find out index block size.
1. Where can I get know our index block sizes?
2. How can I enlarge index block sizes? Is it related with tablespace?
After your suggestion do I need increase or set buffer cache keep pool according to block sizes? 2K, 4K, 8K, 16K and 32K can be specified?
could you help me please?
thanks and regards,
See the BLOCK_SIZE column in DBA_TABLESPACES.
You can't "increase" the block size. You'd have
a) to allocate DB_xK_cache_size for the new "x"K block size
b) create a new tablespace explicitly specifying the block size in the CREATE TABLESPACE command
c) rebuild your indexes into the new tablespace.
Indexes created in a tablespace with a larger block size have more entries in each block.
You may get better performance.
You may get worse performance.
You may see no difference in performance.
You may encounter bugs.
"increasing block size" is an option to be evaluated and tested thoroughly. It is not, per se, a solution.
Hemant K Chitale
http://hemantoracledba.blogspot.com
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HT5071 How do I set my page size in ibooks? I want to make a pdf that is 7X9"
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K T, you mean portrait too?
Maybe my earlier experiences were in iBA 1...
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How should I set up Premiere elements organizer?
I'm using PS CS5 and Lightroom 3. I'm about to install Premiere Elements 9 to do some editing and animation. Since I can view my images and clips in LR library and also Adobe Bridge, what are the advantages or disadvantages of PE organizer? How should I set up the defaults and use PE Organizer? I'm a little concerned about using the same file in different programs. For example, say i have an image that's already been processed for printing and has a specific color profile/ color space that I want to use now as a starting point for an animation in PE. I just don't want to end up writing over previous data but I'm also concerned about having 15 verisions of the same file. Any suggestions for peace of mind? I'm running windows 7.
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I want to know how to get the OS block size of my server ?
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How should I set the iMac display in normal mode
how should I set the iMac display in normal mode
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How do I set the font size in a call out (box) tool ?
Good Morning Mr. Alheit,
Thanks for this bit of apparently obscure knowledge... <<ctrl +e>>
- I'll bet there is more user functions in Adobe Acrobat 9 that I'm not
aware of, too...
- What reference source do your use?
M/G -
I plan on getting my kids i phone 4s how should i set them up should i use my apple id or create new ones how do i keep an eye on them etc
thank youNo it's not stealing. They have an allowance that you can share with so many computers/devices. You'll have to authorize her computer to play/use anything bought on your acct. You can do this under the Store menu at top when iTunes is open on her computer.
As far as getting it all on her computer....I think but I am not sure (because I don't use the feature) but I think if you turn on Home Sharing in iTunes it may copy the music to her computer. I don't know maybe it just streams it. If nothing else you can sign into your acct on her computer and download it all to her computer from the cloud. Not sure exactly how to go about that, I haven't had to do that yet. I wonder if once you authorize her computer and then set it up for automatic downloads (under Edit>Preferences>Store) if everything would download. Sorry I'm not much help on that. -
How to find when index was created in the database.
Hi,
Please help me, how to find when index was created in the database. It should give with date and time.
Thanks... BakserPlease help me, how to find when index was created in the database. It should give with date and time.DBA_/ALL/User_objects Created
Name Null? Type
OWNER VARCHAR2(30)
OBJECT_NAME VARCHAR2(128)
SUBOBJECT_NAME VARCHAR2(30)
OBJECT_ID NUMBER
DATA_OBJECT_ID NUMBER
OBJECT_TYPE VARCHAR2(19)
CREATED DATE
LAST_DDL_TIME DATE
TIMESTAMP VARCHAR2(19)
STATUS VARCHAR2(7)
TEMPORARY VARCHAR2(1)
GENERATED VARCHAR2(1)
SECONDARY VARCHAR2(1)
select OBJECT_NAME,TIMESTAMP,CREATED from ALL_OBJECTS where OWNER='OWNERNAME' AND OBJECT_NAME='OBJECT_NAME' AND OBJECT_TYPE='INDEX';Edited by: Anantha on Apr 21, 2009 3:18 PM
Edited by: Anantha on Apr 21, 2009 3:19 PM -
Multiple DB DBLOCK SIZE for warehouse database?Suggest
Hi All,a faculty from Oracle University told me the idea behind having the multple DB DBlock sizes in Oracle is not the performance but just for the Transporting tablespaces ....Just confirm is that true??????
Database architects here are using larger Block sizes for tablespaces for Warehouse database....which I guess is of not any use...what you say?
Thanx in Advance
Gagangaganahuja wrote:
Hi All,a faculty from Oracle University told me the idea behind having the multple DB DBlock sizes in Oracle is not the performance but just for the Transporting tablespaces ....Just confirm is that true??????
Database architects here are using larger Block sizes for tablespaces for Warehouse database....which I guess is of not any use...what you say?Gagan,
one important point that is often overlooked in this discussion is that the cost based optimizer does a questionable job when dealing with objects in non-standard block size tablespaces when it comes to costing full segment scans (full table scans / index fast full scans).
The Oracle runtime engine adjusts the multi-block read size in non-standard block size tablespaces accordingly, which means that e.g. given a multi-block read count (MBRC) of 8 and a default block size of 8K it will attempt to request 64K (whenever possible, there are cases where this is not possible, reaching extent boundaries or blocks already in the buffer cache).
So in a 16K non-standard block size tablespace the MBRC will be adjusted to 4 at runtime (4*16K = 64K), and the same happens e.g. in a 2K non-standard tablespace where it will be adjusted to 32 (32*2K = 64K).
So apart from effects outlined above that might lead to a reduction of the actually requested multi-block read size there is no difference at runtime with regards to performing a full segment scan.
But unfortunately the cost based optimizer doesn't reflect this runtime behaviour properly, especially if CPU costing is enabled, which is the default in 10g and later.
I've recently run some test cases regarding this particular issue which were provided by Jonathan Lewis as part of the "Cost Based Oracle - Fundamentals" book against the 10.2.0.4 and 11.1.0.6/7 release and they show that the cost estimates are at least questionable. By the way, although I've run the tests against 10.2.0.4 and 11.1.0.6/7, they correspond to the results of previous releases, so the same applies to 10.1 and 9i as well.
For more information, see here: http://oracle-randolf.blogspot.com/2009/02/cost-based-oracle-fundamentals-test.html
Regarding thoughts about putting indexes in larger block sizes, Richard Foote has some interesting notes that try to explain why it probably won't matter in most cases: http://en.wordpress.com/tag/index-block-size/
Regards,
Randolf
Oracle related stuff blog:
http://oracle-randolf.blogspot.com/
SQLTools++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676/
http://sourceforge.net/projects/sqlt-pp/ -
How can I set the minimum size the location bar should automatically resize to
I have moved all of my navigation buttons, location bar and tabs to be in line. This has been done to maximise the available space on screen.
This works perfectly with two or three tabs open, but once more tabs are opened the location bar automatically shrinks to allow for more tabs and becomes unusable. I want to set the minimum size the location bar should shrink to but I do not know how to do this.
[http://www.mediafire.com/imgbnc.php/eed5749531b3081c43186f59492500e5f089c498c0372fb6fa797b7d697826806g.jpg Screen shot displaying automatically resizing location bar]
Any help would be appreciated.
Thanks.FBZP seems to be the only way to do the minimum amout setting in standard SAP.
You can check the BTE (Business transaction event) 00001820 for excluding the low amount items in F110. Please search SDn on how to use the BTEs.
Regards,
SDNer -
How do I set a fixed size for a window (frame) :P
hello!
Was wondering if I can set fix dimensions (size) for a window(frame) in Java.
Background: I have a menu and when I click on one of the options a window opens but I hate the fact that I can enlarge it...wish it would be fixed sized and have scroll instead... :P
any ideas?
many thanks!
Cristinasorry for not using the swing forum but i considered java programming forum as more or less enclosing all problems Do you understand how to use forums? First you should be searching the forums to see if you questions has been asked and answered before. (Very few questions posted in the forums are original). It makes sense to search the forum where the questions should have been posted in the first place.
For example, if you had searched the Swing forum using "fixed size jframe" you would have found this posting at the top of the search results:
http://forum.java.sun.com/thread.jspa?forumID=57&threadID=712407
So you would have had your question answered in less than a minute and we wouldn't have wasted time answering a question that has already been answered.
A win-win situtation for everybody.
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