TABLE OF CONTENTS In this section, we cover some methods and commands used for improving the performance of your AdvFS. We start with a discussion of the advfsstat(8) tool. This utility is quite invaluable, but also very complex. After that, we go into the AdvFS tuning parameters that you can modify in the /etc/sysconfigtab file on your system. These parameters can also be difficult to understand, but we attempt to sort them out for you. Finally, we cover a few other ways in which performance can be improved, most of which we have already covered in other discussions. Two topics that are new to Tru64 5.0 are the direct I/O capability and the directory index hashing features. To get more information on the other areas, such as defragmenting, we refer you to those sections in which we discuss that topic.
The advfsstat(8) command displays a wide selection of AdvFS performance statistics. It reports many statistics in default units of one disk block (512 bytes) per interval, with the default interval being one second. We do not try to cover every detail of this command because it would take an entire book to be completely accurate and complete. We do, however, cover some of the more useful statistics and provide a few examples, which should enable you to become proficient in the tool for your own needs. For example, the volume and buffer cache statistics will be of great interest to anyone looking at tuning the...
