RE: DBMS_STATS and CBO

(Resending)

Any comments on the following??

When creating index, got
ORA-00603: ORACLE server session terminated by fatal error

apparently caused by

ksedmp: internal or fatal error
ORA-01114: IO error writing block to file 121 (block # 149) ORA-27063: skgfospo: number of bytes read/written is incorrect Additional information: 16384
Additional information: 49152

which I determined was caused by attempted write to temp tablespace using a tempfile. The tablespace was dropped and recreated, and all was well again.

What I think MIGHT have happened is the tablespace created weeks ago, but not used. So it didn't grab any actual storage. In the mean time, some of the storage might have been used by something else, but storage was released. Now tempfile goes to grab some space, but filesystem is all screwed up about what storage the tempfile should be grabbing.

Does this sound plausible?
Is there something else going on here?
Is this another one of those spiffy cool things in Oracle that are just something else to go wrong? There seems to be no way of creating a LMT tempfile so that it pre-grabs the disk space.

Note that the index create blew up immediately, so the original tempfile never grabbed any space. So, I think I can say that is definitely didn't run out of space; but maybe somebody walked across the space the tempfile thought it was going to get in the future.

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Author: Stephen Lee
  INET: Stephen.Lee_at_DTAG.Com

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