May 17, 2007

beneath the silence

I imported a file containing a big partition table. The file only contains one partition.

After I entered the command, the process just hang there. After a while, database instance crashed due to one disk is full.
It turned out before Oracle imports the data, it firstly try to locate space for the table. Even I only imported one partition, it tried to locate the space for the whole table.
Because the datafile are autoextensible, it grew and grew and eventually fill up the disk.

I tried to export the table with rows=n and import the file, Oracle still tried to expand the space. Weird, I did not remember that happened before.

Silence kills.

Having not got time to re-test it, onel caveat learned from it:
  • do not turn datafiles autoextensible on when import a file

In another occation, it tookimport process 30 minutes to report that the import user does not exist. What is it doing ?

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