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7.38 How come my 700 doesn't perform as well as I expect?
There are, of course, many answers to that question. Many people
have noticed that HP's conservative choices in some configuration
areas affect performance, especially relevant to Sun workstations.
Two examples:
fs_async kernel parameter. HP-UX by default makes all file system
I/O synchronous. Sun, by contrast, defaults to asynchronous I/O
and depends on the syncer. Setting this parameter to 1 can
significantly increase write speeds, but at the risk of losing
data in a system crash. You can change this parameter with SAM.
SHARE_MAGIC vs. DEMAND_MAGIC. HP binaries by default are SHARE_MAGIC.
This means that ALL pages needed are read in at invocation time.
Sun, by contrast, implements demand paging by default, which
speeds up the invocation time at the cost of page I/O later
in process execution. You can change the behavior on HP binaries
by using the chatr command.
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