Twitter Updates 2.2.1: FeedWitter

Friday, October 1, 2010

Exadata storage Software

How else should I spend a Friday night, other than drinking hard cider, and running performance numbers on the Exadata storage software.

This is my dive into the storage software and WOW is it impressive.. I am selecting from a 200+ million row table (no indexes).. Without storage software it takes 3 minutes to scan the whole table.. really impressive. Then with the storage indexing it takes 30 seconds to come back with a distinct column value. 6 times faster..

Then I was really impressed when I used a Unique key lookup.. No index, it took 8 seconds to find the data, compared to 189 seconds. 23x faster with the Storage software.

Next I made the table parallel 64.. Now it comes back in 3 seconds (no storage software), and 1 second with storage software.. Unbelievable numbers.

One of the first things I noticed is that the Exadata makes you rethink your redo log sizes. When loading data a lot of my waits are waiting on the redo to flush out because it is so small.

All in all the storage software looks pretty impressive.

2 comments:

  1. Hi Bryan,

    Just curious, why load with logging?

    ReplyDelete
  2. Kevin,

    We are thinking about running dataguard Synchronously. After seeing the amount of archive that can be produced in a 1 second period, I'm definately reconsidering that.
    With a Physical we will be running forced logging, so logging will have to be a reality once we go live.. I'm trying to get used to having logging on, but the difference is so incredible, I may not have the patience during our POC.

    ReplyDelete