Re: Disable redo writing
From: Rich Jesse <rjoralist2_at_society.servebeer.com>
Date: Thu, 27 Jan 2011 12:33:40 -0600 (CST)
Message-ID: <6a67482ef56e9e111fdf3b1dce4fd8f4.squirrel_at_society.servebeer.com>
> You can set the tablespaces before import to NOLOGGING mode and enable
> logging after the import is done.
> I'm not sure about importing over network link, but if you run both
> expdp and impdp locally using PARALLEL parameter, then indexes are
> also created in parallel.
Date: Thu, 27 Jan 2011 12:33:40 -0600 (CST)
Message-ID: <6a67482ef56e9e111fdf3b1dce4fd8f4.squirrel_at_society.servebeer.com>
> You can set the tablespaces before import to NOLOGGING mode and enable
> logging after the import is done.
> I'm not sure about importing over network link, but if you run both
> expdp and impdp locally using PARALLEL parameter, then indexes are
> also created in parallel.
That still may not work, at least in 10gR1. From the docs (http://download.oracle.com/docs/cd/B14117_01/server.101/b10825/dp_perf.htm#sthref423):
-- In the following circumstances, Data Pump cannot use direct path loading: * A global index on multipartition tables exists during a single-partition load. This includes object tables that are partitioned. * A domain index exists for a LOB column. * A table is in a cluster. * A table has an active trigger. * A table has fine-grained access control enabled in insert mode. * A table contains BFILE columns or columns of opaque types. * A referential integrity constraint is present. * A table contains VARRAY columns with an embedded opaque type. If any of these conditions exist for a table, Data Pump uses external tables rather than direct path to move the data for that table. -- The RI restriction would seem to be the most common gotcha. I never could get Data Pump to use direct path inserts using the API over a database link, even without any RI present. I ended up using it just for tables with LOBs and then an INSERT/SELECT over the link with the APPEND hint for all other tables. Quite the PITA! Then again, this is on 10gR1 -- perhaps newer versions (still under primary support!) work differently. Rich -- http://www.freelists.org/webpage/oracle-lReceived on Thu Jan 27 2011 - 12:33:40 CST