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From rick jones <...@cup.hp.com>
Subject documentation/3214: naieve following of the tuning advice for 10.20 can lead to system panic
Date Wed, 14 Oct 1998 19:41:06 GMT

>Number:         3214
>Category:       documentation
>Synopsis:       naieve following of the tuning advice for 10.20 can lead to system panic
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    apache
>State:          open
>Class:          doc-bug
>Submitter-Id:   apache
>Arrival-Date:   Wed Oct 14 12:50:01 PDT 1998
>Originator:     raj@cup.hp.com
>Release:        omnibus
HP-UX 10.20, any patch level past MR.	
When I provided tuning tips for HP-UX 10.20, I failed to mention the specifics
of how to set tcp_hash_size in the kernel disc image. It is critically important
that folks use "W" to write a 32 bit quantity, not "w" to write a 16 bit value
when patching the disc image. 

The tcp_hash_size parm is a 32 bit quantity, and using "w" will put a value into
the _upper_ 16 bits of that value, which will cause it to be larger than the 
machine can take, and the box will panic upon reboot.

Simply use the wrong case in the adb command and reboot.
Modify or append the tuning description to include a warning to use "W" instead
of "w." Also, point-out that this particular tune is not applicable to HP-UX
11.X. That release has an entirely different set of tunes - if someone can give
me a proper email address to submit them (I suspect the bug report page is not
it :) I'd be happy to oblige
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