I just ran through a few tests with the v14 patch against 100GB of data
from dbt3 and found a 30% improvement; 3.6 hours vs 5.3 hours. Just to
give a few details, I only loaded data and started a COPY in parallel
for each the data files:
http://www.testing.osdl.org/projects/dbt3testing/results/fast_copy/
Here's a visual of my disk layout, for those familiar with the database schema:
http://www.testing.osdl.org/projects/dbt3testing/results/fast_copy/layout-dev4-010-dbt3.html
I have 6 arrays of fourteen 15k rpm drives in a split-bus configuration
attached to a 4-way itanium2 via 6 compaq smartarray pci-x controllers.
Let me know if you have any questions.
Mark