The Next Step
If
you use packaged software, it may not be possible for you to tune
either your applications or your database schema. And even if you do
carry out your own development, it is neither realistic nor necessary
to seek perfect performance in tuning your applications and database
schema. The 80/20 rule applies here as elsewhere: 80 percent of your
tuning effort could well be spent squeezing the last 20 percent of
performance from your applications. Emphasize elimination of the major
bottlenecks.
Once
everything possible has been done to deal with the class of problems
described above, we are now ready to proceed to the next stage:
monitoring the operating system and database.
After
monitoring, you should finally find yourself in a position to decide
whether your hardware is adequate to achieve satisfactory performance.
But
before we can develop a drill-down method for finding performance
problems, we need to first look at the monitoring tools available to
help with the task. The next chapter gives a snapshot of some of the
useful system monitoring tools available for Solaris.
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