Primary Key - non sequenced - can this cause problems??

We are seeing some strange explain plans for some queries in our 10.2.0.3 database. It just seems to me that Oracle is not using the index(es) that we expect it to use. In our discussions it was brought up that the data in the Primary Key fields in our tables are not sequential at all. I am wondering if this can be causing some issues with Oracle and it's explain plans.
Can the fact that our PK fields are not sequential be causing some issues with Oracle and the optimizer?

Things to consider:
http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/ex_plan.htm#sthref1858
http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/optimops.htm#sthref1254
http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/optimops.htm#i82005
Message was edited by:
dbtoo
system stats - http://download.oracle.com/docs/cd/B19306_01/server.102/b14211/stats.htm#i41496

Similar Messages

I installed the latest version of flash player and it said installed successfully and i can use it just fine, but when I checked system requirements it didnt seem to match. it needed 2.33 ghz and I have 2.13ghz. can this cause problems to my computer? i h

I installed the latest version of flash player and it said installed successfully and i can use it just fine, but when I checked system requirements it didnt seem to match. it needed 2.33 ghz and I have 2.13ghz. can this cause problems to my computer? i have an intel i3 proccessor, windows 7, internet explorer.

Since all Intel i3 processors have at least 2 cores, your specs are well above the requirements; see http://ark.intel.com/products/family/75025#@All
I have some computers with far slower processors, and Flash Player 14 works perfectly well on them too.

File Vault encryption locked up. No progress for 24 hrs. If I restore from a non-encypted back-up will this cause problems?

Started file vault yesterday and no progress for 24 hrs. If I do a Command-R restore from a non-encrypted back-up will this cause problems?

You first must repartition and reformat the drive before restoring your backup.
Install or Reinstall OS X from Scratch
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.
Erase the hard drive:
1. Select Disk Utility from the main menu and click on the Continue button.
2. After DU loads select your startup volume (usually Macintosh HD) from the
      left side list. Click on the Erase tab in the DU main window.
3. Set the format type to Mac OS Extended (Journaled.) Optionally, click on
      the Security button and set the Zero Data option to one-pass. Click on
      the Erase button and wait until the process has completed.
4. Quit DU and return to the main menu.
Reinstall OS X: Select Reinstall OS X and click on the Install button.
Note: You will need an active Internet connection. I suggest using Ethernet if possible
           because it is three times faster than wireless.
This should install the version of OS X that you had installed.

My husband shares my Apple ID but now I see that this causes problems so how can I take him off my account so he can get his own Apple ID ?

My husband shares my Apple ID but now I see that this causes problems. So how can he get his own Apple ID for his device?

I agree that having separate Apple IDs is a good idea. It helps keep things from getting confused between two user who might have different needs and wants on their devices.
You husband should save and backup to a computer all the files, photos and music that he wants to keep. He should also save any files created with the apps on his device. Once that is done he can use the Settings app to erase his device.
Settings > General > Reset > Erase all Content and Settings
He can then set up his device as new and create an Apple ID for himself. Once the device is up and running he can purchase and/or download the apps he wants and sync with a computer to restore the photos, files, etc.
To make syncing easier, with two Apple IDs, I suggest that you each use a different computer to sync with OR you have separate accounts on one computer. This way there will be two separate iTunes libraries and syncing with each will be straightforward.

I replaced my hard drive and used time machine to boot from but it installedthe unrepaired disk permissions of the faulty previous drive would this cause problems on my new drive?

I replaced my hard drive on macbook pro and used time machine to boot from but it also installed the unrepaired disk permmissions of the other drive, would this cause problems to my new drive?

Can you remember what the permissions problem was that you had before? You may need to reinstall OS X from scratch and not reinstall anything from your Time Machine backups. To be on the safe side you should reinstall all third-party applications from scratch, as well. Then only restore from your backup your document/data files.

I need to download dell drivers to a jumpdrive connected to my iMac. Will this cause problems with my Mac?

I need to download dell drivers to a jumpdrive connected to my iMac. Will this cause problems with my Mac?

Thanks. These drivers are for the audio, etc. for a dell laptop I purchased used. ( Needed something cheap for a training video that would only run on Windows. Tried Emedia player but picture was too fuzzy.) Dell support said I should contact Apple support for instructions on how to get the drivers onto the jumpdrive. Any tips on doing that?

Primary key, column, sequence : best practice.

Hi I was wondering when designing table should you limit the length of primary key.
Because if you have limited column length, and your adding and removing items than you have sequence gap, than you will need to resize column length and if their foreign key (resize them in foreign key relationship too) or you need to reset sequence to go back to the maximum (id).
WHat are the benefits and disbenefits of having limited column length. Is their way to restrict the maximum number of items without putting column length in their (inside the database) not the application.
Thanks.

Unless you know the exact number of rows your table will have, it is not convenient to limit the size. Now it all depend on what you mean by limiting the size and which column type you are talking about.
Here I have some notes about --> Why is Varchar2 oversizing bad?, where I state this:
Apparently the same space consumption would be the same if a Varchar2(4) is used versus a Varchar2(4000), if you require one byte, then one byte will be allocated, and performance should be the same, but when taking a look at the performance statistics there are some surprises that arise.
When fetching information from Oracle, buffers and fetching structures are being prepared beforehand to be able to manage the maximum column lenght, applications such as toad may run out of memory trying to allocate resources to retrieve the information from an unnecessarily over sized varchar2 column.
The answer to your case is: you should better plan according to your actual requirements, if you oversize columns you will degrade performance and you will have memory issues on the long run. If you under size then you will have problems with maximum capacity in your tables and you will be forced to -most probably- perform online maintenance to your objects to resize them.
~ Madrid
http://hrivera99.blogspot.com/

In downloading some games requires install of flash pgm, can this cause damage to the operating system?

I am new to Mac book pro world, wanted to run some games from website, or downloads. They require install of "Flash" f appl. Could this cause any damage to the Mac Operating System? (I'm used to the PC Microsoft world)
Thanks, Tom

Won't cause any damage. Apple just stopped including Flash in its default installation a while back, but there is no problems with you installing it. Just be warned that Flash apps tend to really drain your battery quickly.

My computer message says NSPR fails, see mozilla for download / can this cause flashcrash? am i expected to buy?

flash drive or shockwave has been installed 150+ x because of crashes, checking pc performance i have archived message NSPR has failed- get download from mozilla- can I get a free download? and will that cure crash problem?

The two crash reports with the "bp" prefix are problems with plugins (Flash).
You can check for problems caused by recent Flash updates and try these:
*disable a possible RealPlayer Browser Record Plugin extension for Firefox and update the RealPlayer if installed
*disable protected mode in Flash 11.3 and later
*disable hardware acceleration in the Flash plugin
*downgrade the Flash player to version 10.3 or 11.2
*http://kb.mozillazine.org/Flash#Troubleshooting
*http://helpx.adobe.com/flash-player/kb/flash-player-113-crash-mozilla.html
*https://support.mozilla.org/kb/flash-113-doesnt-load-video-firefox
*https://support.mozilla.org/kb/flash-113-crashes

Computer space limited....can this cause it to crash?

It would appear that I may not have enough disc space for the newer Adobe Photo program and conerned it might crash!
Can this be corrected?

Hi BABryant,
If you do not have enough space for the new program, it might result on slower functioning of the program and the computer as well.
I will not be surprised if the program crashes too. Please free up some space on the hard disk removing unused / unnecessary softwares.

Patching Domain controllers on different days. Can this cause issues

You fellas are awesome. Thanks for the peace of mind.

We have a few domain controllers that need to be patched. 2 for one of our locations and 2 for the other. They are both on different subnets however they do replicate AD information. My plan were to patch the two domain controllers tonight for one of our locations. Then patch the others on a different night for the other locations. My question is will this cause any replication issues since the two DCs would have different updates and service packs? I remember having this issue with exchange when I did this but Exchange was in a DAG which the AD boxes arent. Any replies are much appreciated.
This topic first appeared in the Spiceworks Community

Could someone help me quickly, i put in new harddrive, lion is installing, but snow leopard cd is in my drive - will this cause problems?

the harddrive on my 2008 24" imac died, i purchased a new harddrive and my husband installed it with no problem. i had some misinformation that i would have to reinstall snow leopard and then i could upgrade to lion.
i turned on the computer put the snow leopard installation cd in the drive, then my computer opens to the pewter gray linen looking screen and i see that i can install lion from there. i used the disk utility and erased the new drive, and reformatted and then i went back to the install lion screen and lion is downloading with no problem, BUT that snow leopard cd is in my drive and i can't eject it. is it going to give me problems when the computer automatically reboots? will it try to reboot to that cd instead of continuing with the lion install? can i hold down my mouse to eject it when it reboots or will that mess up the installation?
confused, and i have an hour and 33 minutes to figure it out before it downloads. panicking here.
any help would be appreciated!

thank you for answering so quickly, i was really concerned that the computer would try to boot from that cd instead of continuing with the lion install. this was too easy, i'm used to windows installation which is complicated. i should have known apple would have made it simple for me. thanks again for the help!

Can Nodemanager Cause problems?

Hi, we are using an application called Concur with BEA WebLogic express v8.1 SP2.
There are some problems, mainly backend db process blocking but the software vendor refuses to support us because we are using "Nodemanager" to instatiate our remote application servers. They say all JVM's should be started from the registry.
My question is, all things being equal (Java version, start up params, classpath etc) can starting a JVM with nodemanager cause any problems than starting it as a windows service??
Thanks!

Hi
NodeManager "forks" another process that is the wls instance you can use to connect to DB
I think your problem is other.
Jin

Been shutting off my Macbook Pro for months. Will this cause problems?

Hi,
I only just read today that it's actually best to keep a Macbook Pro on sleep at night and not shut. Is this true? If it is I'll be doing from now on.
Also, I've been shutting my Macbook Pro off at night, every night, even several times during the day if I'm using it during the day. Will this damage it? If so is there anyway to reverse the effects that shutting t down might do?

It makes no real difference whether you shut it down or put it to sleep. Sleep is faster for wakeup than rebooting is. Shutdown saves on electricity or battery power (if not connected to the AC adaptor.)
No harm is caused by shutting down. If you are traveling it's better to shutdown. If not using the computer for a couple of hours then putting it to sleep will let you get back to work quicker.
The computer should be shutdown if it's not going to be used for more than 8-12 hours.

Fundamental question about EDD - why localized? Will this cause problems in other languages?

Hi,
I am running a German version of FrameMaker. All commands in the EDD appear in German. What happens when someone uses the EDD with an English or Chinese version of FrameMaker? Will this work as well?
If editors have a look at the EDD, do they see German commands or commands in their own language?
Can I simply change to English instead of German commands?
Thanks for your reply.
Apollo102

Hi Apollo,
the EDDs are based on a Meta-EDD, that carries the whole localization of the EDD structure and the EDD structure itself.
This Meta-EDD is the elemcat file Lynne mentioned. If you replace it with a version that is localized in some other language, your standard EDD will take over that localization.
You could even modify the Meta-EDD to suit your EDD building needs better (I already saw some approach into that direction) or you could localize your EDDs to some completely different and yet unsupported language if you liked (Klingon EDD style, qapla'!).
The localization in itself is bound to the file where you embed the EDD (or Meta-EDD), so everyone who opens the EDD will find the language used for the original.
-Alex

Primary Key - non sequenced - can this cause problems??

Similar Messages

Maybe you are looking for