Mount point containing the redologs

Question

We were told Oracle typically writes 512b redolog records to the redologs. If the mount point is created with a blocksize > 512b the remaining space is wasted.
For example, if the mount point is created with a 4K blocksize, most likely 3.5K of the block is wriiten with spaces or null characters. This would than cause ~75% of the redolog to contain spaces or non - redolog information.
should the mountpoint containing the redologs be created with the 1k block size?
Regards

Answer 1

user13484479 wrote:
We were told Oracle typically writes 512b redolog records to the redologs. If the mount point is created with a blocksize > 512b the remaining space is wasted.
For example, if the mount point is created with a 4K blocksize, most likely 3.5K of the block is wriiten with spaces or null characters. This would than cause ~75% of the redolog to contain spaces or non - redolog information.
should the mountpoint containing the redologs be created with the 1k block size?
Oracle uses the physical sector size as the block size of the redo log files and uses the same unit for doing the IO as well. If you want to change the physical sector size, that is only possible if the physical disk of yours would be supporting the size more than 512b which is still not happening by the storage vendors AFAIK. If your vendor confirms that its possible to have a physical block size more larger than 512b and of 4kb, than only you would be able to do so. And if your storage allows you to go more than 512 bytes, you have the option from 11.2 (only) to change teh block size of the redo log file to 4kb .
Besides the links given by Girish, I wrote about it some time back on my blog too. Have a read,
http://blog.aristadba.com/?p=124
HTH
Aman....