How many TEMP space needed for datapump import?

How exactly can we predict how TEMP table space is required before starting an import data pump (via impdp)?  I need a way to predetermine this before you start the import operation.  It is my understanding that data pump import, temporary table spaces are mainly used for the construction of indexes among other operations.

Such a formula assumes that you are not a multi-user system.  This could be essentially true, if you assign their temp temp abusers, or have a few batch series DW loader.

Since you're probably a multi-user system, it may be best to figure it out empirically, then set limits to limit runaway sessions.  One way to do that is to make autoextend with a limit based on your disk space, let the system run for awhile, then disabling autoextend, apply the ROT of X 2.  But it can be so many site and specific application, it is difficult to say what is the best advice for you - unless you find someone with a similar system with the app.

Many of us just test to see, for the import.

Tags: Database

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