Re: Question: Is is safe to move a 'plan table' to a temp tablespace???

BD wrote:
> Hey, all.
>
> I've got a non-managed standby database, which I am hoping to release
> as a reporting database.
>
> I'm trying to determine what I can and can't do with this db. Clearly,
> as it can only be opened in read only mode, I can't modify anything.
>
> I am trying an explain plan on a SQL statement (something I'm sure the
> developers would like for testing) and get an error:
>
> RA-01552: cannot use system rollback segment for non-system tablespace
>
> My current impression as to why this is happening is that explain plan
> writes to the plan_table, which is stored in a permanent tablespace.
>
> Can I not run explain plans in a read-only standby, then? Or is there
> some mechanism of moving the plan_table to a temp tablespace? Sounds
> like a bad idea, but otherwise, I see no way of using explain plan for
> tuning in a read-only db...
>
> Thanks for all comments,
>
> BD.

One could certainly create the plan table as a global temporary table in the source production database.
Whether that is sufficient to work on a standby database is another matter.

-bdbafh Received on Thu Jun 01 2006 - 16:29:23 CDT