April 1998
Intermediate to advanced
624 pages
16h 11m
English
book
Sun Performance and Tuning: Java™ and the Internet, Second Edition
by Adrian Cockcroft, Richard Pettit
Content preview from Sun Performance and Tuning: Java™ and the Internet, Second Edition
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Sizing Tests and Results
A range of applications were put through the test process to produce results that can be used as examples. To start with, the boot sequence was examined in detail.
Boot Sequence Analysis
A simple measurement is the activity during a JavaStation boot to the point where it presents a login screen. This activity involves the transfer of about 4 Mbytes of data using a total of about 4,000 packets in about 40 seconds. Apart from a small number of various kinds of name service lookups, the bulk of the traffic consists of a TFTP bootstrap of 158 Kbytes, followed by an NFS transfer of the 4-Mbyte JavaOS 1.0 image, using 8-Kbyte NFS V2 reads over UDP. JavaStations that can store a copy of JavaOS in a nonvolatile “flash PROM” ...