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Oracle Data Load benchmark results

See here for details on Oracle insert performance benchmark tests.

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March 22, 2005

Article Review

Load Your Data Faster
By Roger Schrag

SQL> UPDATE RMOUG (, summer 2003 issue 

In this article on showing the various ways to load data into Oracle tables, Schrag offers up a simple, makes sense approach (6 meg of data in 100k rows) and shows real-world timings for his tests of the various Oracle data loading techniques.  Schrag offers results and insights into each of the Oracle approaches:

                                 Oracle Server       Data Load Method                               Seconds        CPU seconds
SQL*Loader direct path load               9              3
Bulk row inserts                         14              7
CTAS from an external table              15              8
Insert (with append) from external table 15              8
SQL*Loader conventional path             81             12
Single row inserts without indexes      130             35
Single rows inserts                     172             52

These results confirm the conventional wisdom about Oracle data loading techniques, but the novel tests using external tables for data loading earn Schrag four stars.

The only missing pieces (and perhaps topics to cover in a follow-up article) would be:

1.  Data Pump:

Timings for the new Oracle 10g data pump (impdp) which allegedly has faster data loading speeds.

2.  OCI:

Timings for a native C program using Oracle Call Interface (OCI).

3.  Storage:

It would also be interesting to see if the type of storage has an effect on the data loading timings, as suggested by Texas Memory Systems tests with super-fast data loading with solid-state disks (RAM-SAN).

4.  Parallelism:

It would be great to see if these data load speeds scale with parallelism, both parallel hints (SQL inserts) and parallelized, concurrent loads into the same target table.

Overall, this is a comprehensive and satisfying article, with plain English explanations and easy-to-understand methods.




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