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тАО11-20-2001 03:49 PM
тАО11-20-2001 03:49 PM
Oracle Block size
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тАО11-20-2001 04:04 PM
тАО11-20-2001 04:04 PM
Re: Oracle Block size
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тАО11-21-2001 01:03 AM
тАО11-21-2001 01:03 AM
Re: Oracle Block size
Oracle block size is defined at database creation, and cannot be changed afterwards.
Oracle 9i however, has the possibility to define a block size per tablespace.
regards,
Thierry.
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тАО11-21-2001 02:02 AM
тАО11-21-2001 02:02 AM
Re: Oracle Block size
As of 8i, it is not possible.
...BPK...
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тАО11-22-2001 06:09 AM
тАО11-22-2001 06:09 AM
Re: Oracle Block size
There is no way, except to recreate.
On 9i you can do this on individual tablespaces, but not on the system tablespace. So there as well you'll have to recreate.
If you have the creation scripts still, this should be easy enough! (but takes some time if large base)
Andreas
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тАО11-22-2001 07:12 AM
тАО11-22-2001 07:12 AM
Re: Oracle Block size
That's a generalised suggestion. But not necessarily applicable in all situations. Especially, when the memory in the system is large; and when there are options like enabling pseudo-swap.
<
16Gb would be a overkill. You can start off
with 8Gb Physical swap (neatly spread across
different disks, VGs , with the same priority and size). Enable pseudo swap through the kernel parameter swapmem_on. When you enable
the pseudoswap, it *dynamically* uses 75% memory for swap too, which makes the total swap size around 14Gb.
Once you do this, monitor swap usage regularly through swapinfo -mt (or glance etc) and see how the swap is being used.
If you are swapping a lot, then there is a problem with the way the oracle instance is tuned.
HTH
raj
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тАО11-22-2001 07:16 AM
тАО11-22-2001 07:16 AM
Re: Oracle Block size
Can you explain why you think you need to reduce the blocksize?
live free or die
harry