Oracle windows ntfs block size

Note also when formatting a partition under Windows NT 3. Need more help? Expand your skills. Get new features first.

Was this information helpful? Yes No. Thank you! Any more feedback? Which one should we use? Thanks so much for your help. May 27, - pm UTC. I know what I would guess, but I don't like guessing :.

Williams, May 27, - pm UTC. This advice from Steve Adams re: block size might be interesting May 28, - am UTC. Hi Tom, Then do you agree that file system block size should be equal to db block size if possible, assuming there is no third party tool? By the way, Mark, thanks for the useful link. May 28, - pm UTC.

Williams, May 30, - am UTC. I sent a note to Steve and this is his reply: [quote] Hi Mark, No, file system buffer size is not the same as file system block size.

File systems with small blocks buffer multiple blocks per buffer, and file systems with large blocks use multiple buffers per block. You can quote me if you think it would be helpful. May 30, - am UTC. Thanks, I know Steve is very precise in his terminology, so that "buffer" word raised a flag. Hi Tom, I asked support engineers of different vendors. None of them seems to know the meaning of this term. Or you just consider file system block size? June 16, - am UTC.

I pretty much use 8 or 16k in most all cases these days personally. OS Block size vs. So, is there a nice summary of guidelines that you think makes sense in regards to db block size vs. My "guess" is to go with what Howard says in general unless you have a specific requirement for which you want to try out an alternative block size.

In other words, ave ou ever used db block size not equal to OS block size yourself and if so, what were the results? August 04, - am UTC. Not unless I identified IO as being a serious problem first. A reader, August 04, - am UTC. I thought that was not the case not with the systems we worked on. Do you know of any such systems? August 04, - pm UTC. A reader, August 04, - pm UTC. The latter seems like the FS where you can use direct IO optionally and also gain the advantages of file systems "ease of use" etc.

Your last sentence is more or less "dead on". OCFS is an implementation that does that, good for datafiles, but I wouldn't want my binaries on there. Oracle 10g block size thirumaran, August 05, - am UTC. Hi Tom, I am new to oracle 10g and had last worked on oracle projects 3 year's back. For 10g DB how do I decide on block size. I need to recommend a block size for a Product DB.

What are the checklist i use see before recommending a block size. Examples will be a great help to me. Thanks in adv Thirumaran. August 05, - pm UTC. How about RAC? A reader, August 05, - am UTC. A know there is no simple answer before the testing is done but No, if you are worried about minimizing interconnect traffic, you'll look "higher" than the block, you'll be looking at partitioning of data and workload accordingly. A reader, August 05, - pm UTC. Thanks Tom, my gut feeling was telling me the same Thanks for your time.

Regards, Nikunj. September 12, - am UTC. If you "unconfigure" them and have tablespaces with those blocksizes - you'll not be able to use them. Which average size is closer to the actual? A reader, September 12, - pm UTC. This is an instance with 8k db block size.

September 12, - pm UTC. Also, there are nuances to do with migrated and chained rows and so on. They sure seem closer than close enough to me. Hi Tom, The responses are very interesting. I have a question about increasing the database tablespace size in Oracle 10g.

We in need to increase this tablespace to 64 GIG. We are using solaris and it contains around 80 GIG of memory. But it actually throws an error as "larger than the allowed number of blocks". Now I want to increase our memory. Could you please tell me how to increase the database tablespace size? May 11, - pm UTC. Add another datafile.

That is all you need to do, alter tablespace users add datafile 'whatever' size XXgb. Hello Tom, hope you're well. I have the same question as one of the guys on this page. The only difference which I can observe is that in production system we have 16K tablespace and in testing it is 8K. Why could it happen and what can be done to make things better? I wouldn't like to change production blocksize as it is a kind of DWH system and we increased blocksize deliberately to have maximum performance for selects.

June 09, - am UTC. Hello Tom, thanks for your attention. I put a logon trigger in the database to catch up what SQLLoader is doing.

So the situation is as follows: we have 2 users created by the same sql clause in the same instance. Tables are created by the same clause. The only difference is that in production environment the table contains partitions for each day of this and the next year and in the test environment it contains partitions only for 3 months. I'm loading the same file on the same machine with the same amount of users.

So there is an obvious huge difference in recursive calls. Why could it happen? Thanks in advance. June 15, - pm UTC. Datafiles are on the same disk array. How many partitions loaded into in each environment that would definitely affect this how many rows are you actually loading here? Hello Tom, sorry for my ignorance.

I didn't think that partitions overhead could be so huge. Actually I have partitions for each day. And the data is loaded as it comes in real time - so all the records in the file can contain calls for one or two if the file is collected just after midnight days and will fall into one or two partitions.

Now as I deleted partitions for the next year, peformance is 8 times better. And I think that now I can understand why I had this huge amount of recursive calls. Say, we have a table which has a lot of range partitions, e. If it is not, it goes down partition by partition trying to find a correct one.

Is my understanding correct? June 16, - pm UTC. Yes, I'm loading data in direct mode. June 19, - pm UTC. How does that work out? This is the log from direct path: Bind array size not used in direct path. As I don't have to maintain any indices and constraints and main idea is to load the data ASAP, I think it is quite reasonable to use direct path.

I have been reading through this question with great interest. I understand that there is no definitive answer, but can you please give your best recommendation on the following. Step 2. Right click the partition, select Format Partition. Step 3. In the format partition window, you can change cluster size in the drop-down menu, here you can choose 64KB to change cluster size from 4KB to 64KB.

Click OK. Step 4. Here you will back to the main interface, click Apply at the toolbar and then click Proceed to execute the whole operation. Those three methods all can help you change block size from 4K to 64K. But we highly recommend the software AOMEI Partition Assistant, the great partition manager, can not only help you change cluster size from 4KB to 64KB, but also solve you many other partition problems.

For example, if you do not satisfied the partitions on your hard drive, you can use it to repartition hard drive with a few mouse clicks. About block size and cluster size According to Wikipedia, in computing, a block is the size of a block in data storage and file system.

Why change block size from 4K to 64K? These parameter settings may vary depending on your hardware configuration. For descriptions of all initialization parameters and instructions for setting and displaying their values, see Oracle Database Reference. If you use Database Configuration Assistant to create a database, then the initialization parameter file is automatically created for you. Editing The Initialization Parameter File To customize Oracle Database functions, you may be required to edit the initialization parameter file.

Database Configuration Assistant Renames init. Sample File Oracle Database provides an annotated sample initialization parameter file with alternative values for initialization parameters. To use sample file initsmpl. Initialization Parameters Without Windows-Specific Values Oracle Database Reference describes default values for many initialization parameters as being operating system-specific. Uneditable Database Initialization Parameters Check the initialization parameters in Table when creating a new database.

Supported on Windows to write XML format audit files. Uses default value set in Oracle Database kernel no Windows-specific value. Specifies directory where Oracle Database dumps core files. Uses maximum value limited by available memory. Specifies size in bytes of standard Oracle Database blocks. Maximum possible file size with 16 K sized blocks.