NOLOGGING - anything else?

In as few words as possible, I run an application that uses old-school "silos" - product/store/week financial data (e.g., dollar sales, unit sales, dollar costs etc.) is sqlldr-loaded in an intermediate table, then divided into 106 tables 'week', where each table contains all the data store/sku for a week. Hey, I said this is old school partitioning :). I suggest generally create text files a week at a time so that only a single statement 'up-to-date' need to run to "split".

The first time I loaded 26 weeks of a data value (about 7.2 million lines per week), I started with a tiny tablespace and grow (it's just a database test on a laptop). It took, on average, about 90 minutes per week. The tablespace is passed to about 23 concerts.

After cleaning all the tables and run the process a second time, I turned on NOLOGGING for all 26 tables AND the intermediate table. The combination that more than the fact that the tablespace has been 23 concerts already let down the average up to about 70 minutes a week.

Issues related to the:
1. because I did a perfectly scientific experiment, what percentage of the increase in performance would guess it was due to storage file is already great vs the NOLOGGING?
2. is there anything else I need to do to get the benefit from NOLOGGING also set this option for tables, that is what I have to put anywhere else or look good the SQL? All I want to do is run this initial load as quickly as possible - in production, we'll load 104 weeks of data in the system, so all I can do to shorten the time weekly sauce on mashed potatoes.

Thanks in advance,
DTXCF.

NOLOGGING will be obeyed only when making way direct load (DIRECT = TRUE).

You do this? If this isn't the case, then NOLOGGING has no effect.

Tags: Database

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NOLOGGING - anything else?

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