Database Reference
In-Depth Information
The first thing we did was to baseline the existing system. We then baselined the
database sitting on the new infrastructure. When we compared the two baselines, what
jumped right out at us was the fact that the new disk storage array was substantially
slower than the old disk storage array. Slow disk drives always mean a slow database.
This is why it is so very important to baseline before you begin the journey of
virtualizing a database.
Tip
Over 80% of the problems in a virtualized environment have to do with storage.
The storage is either misconfigured, misused, or mis-sized.
The baseline is used as a reference to determine whether the virtualized systems meets
or exceeds the performance of the physical system it was migrated from. You need to
capture a baseline of the existing live production system to act as this reference while at
the same time not impacting production performance.
Tip
It is important to capture a baseline of the existing production system while at the
same time not impacting production performance.
Later in this chapter, we show you what tools to use and how to properly baseline the
performance of your production system while not impacting performance. An example
of some of the metrics to consider that make up the performance baseline are displayed
in
Figure 10.1
. In this figure you see many other things you need to consider, from
security to operations, but they are not the focus of this chapter.
