Re: Relocating LOB segment

From: Brent Day <>
Date: Thu, 5 Feb 2015 20:34:55 -0700
Message-ID: <>

Since it is a LOB you can't parallelize it.

You can typically use parallel DDL where you use regular DDL. There are, however, some additional details to consider when designing your database. One important restriction is that parallel DDL cannot be used on tables with object or LOB columns.

On Thu, Feb 5, 2015 at 8:26 PM, Hameed, Amir <> wrote:

> Hi folks,
> We need to relocate a ~300GB LOB segment from one tablespace to another
> tablespace. The MOVE command, when ran against copy of production, took
> somewhere around 20 hours to relocate the LOB. When I ran the ALTER TABLEā€¦.
> Command with parallel option and traced it with 10046, it seems that under
> the hood the operation was getting serialized. I was wondering if anyone
> has experience with relocating large LOB segments and what approach was
> taken to minimize the down time. Any feedback will be appreciated.
> Thanks,
> Amir

Received on Fri Feb 06 2015 - 04:34:55 CET

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