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Data versus Temp (on ASM)

in Database Administration (MOSC) 29 commentsAnswered ✓

Question; on ASM filesystems, should the temp files of a database be in the same ASM Disk Group as the data files ?

I'm thinking not because of this: the behaviour of Data and Temp is so different, that it is hard to size one ASM Disk Group correctly if you need both :

  • free space for data growth
  • an arbitrary volume of space for temp database usage

If you have them in one ASM Disk Group, how will you ever know what remaining space in that Disk Group is for which of both, and thus knowing if any of them has enough space. Every gigabyte/megabyte/... can at 1 time only be used to store data, or to be used for temporary storage.

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