Hi Lothar, having written a couple of Oracle Data Cartridges, and Oracle Text
is just another albeit out of the box from Oracle, as a strategy I would
explore whether you can migrate over the 800 million row table AND the
underlying Oracle Text indexes (that are just ‚tables‘ embodied with a ROWID
link to the parent table as required by the ODCI; the names of these tables
‚used to be‘ similar to the base table prefixed by I$, K$ and a few other
letters I cannot remember), then scripting a bit of DML to update the
new/migrated ROWID’s manually. This way you could avoid the time expensive
component, that is the lexical analysis etc., of recreating the index from
scratch.
Mike
http://www.strychnine.co.uk ;<http://www.strychnine.co.uk/>
Am 25.11.2019 um 14:53 schrieb l.flatz@xxxxxxxxxx:
HI Jonathan,
yes, I thought of it too. Of course the index will become less efficient.
BTW: was there not any preference to start a sync job on commit?
I can' t find it ...
Regards
Lthar
----Ursprüngliche Nachricht----
Von : jonathan@xxxxxxxxxxxxxxxxxx
Datum : 25/11/2019 - 15:37 (MN)
An : oracle-l@xxxxxxxxxxxxx
Betreff : Re: Text Index Create takes forever
Since it's going to be a killer anyway. hash partition about 16 or 32 ways
while you move it.
Regards
Jonathan Lewis
________________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx <oracle-l-bounce@xxxxxxxxxxxxx> on behalf
of l.flatz@xxxxxxxxxx <l.flatz@xxxxxxxxxx>
Sent: 25 November 2019 13:17
To: oracle-l@xxxxxxxxxxxxx
Subject: Text Index Create takes forever
Hi,
we have a 8oo million rows table that we want to migrate to an other
Tablespace.
The key point is the migration of a Text index based on a BLOB (Secure file)
that contains PDF.
The recreation of the Index takes weeks. It is CPU bound and the time is
spend parsing the BLOB.
So far it seems the best Strategy to gfo as high parallel as possible.
Any idea to speed this up? DB version is 12.2.0.1.
Regards
Lothar
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