HP StorageWorks Enterprise Virtual Array Online Firmware Upgrade Best Practices (5697-6388, January 2007)

Oracle 10g had a very similar performance impact from the ﬁrmware upgrade as Microsoft SQL 2005.

Figure 18 shows the transactions per second d ipping sharply during the ﬁrmware upgrade event, but then

returning to a steady level once the upgrade is complete. While a reduction of transactions per second to

nearly zero is not an ideal situation, the continuous running of the application server is of far more value.

Figure 18 Heavy load on Oracle 10g

Effect of online ﬁrmware upgrade on application resiliency