HP-UX 11.23 Kernel Parameters for Legato Networker 7.2.1 (large environment).

[David Libby_4]

Hi Everyone,

I'm looking for a kernel parameter "recipe" (i.e. /stand/system) for Legato Networker 7.2.1 on HP-UX 11.23 in a large environment.

So far HP and Legato have been unable to provide and we've been iteratively "tweaking" until now which is a little irritating to say the least.

All the "tweaking" was historically on 11.11 and we have had satisfactory stability on 11.11 for some time now, but it was too painful getting there.

I'm not talking about performance tuning... but guaranteeing "stability" and "functionality" under load.

Now that we are migrating to 11.23, we want to avoid that old scenario of iterative configuration by implementing a kernel which is properly configured from the start.

So in short :-),what we're looking for is a /stand/system file which covers "stability and functionality". A recipe, if you like.

Here's the tunables we have modified so far on our new 11.23 systems... the modifications are based upon our experiences with *11.11*...

=======================
tunable shmmax 17179869184
tunable semmnu 260
tunable ninode 16384
tunable ncsize 21504
tunable msgseg 32767
tunable msgmnb 65535
tunable msgmap 2048
tunable msgtql 2046
tunable maxvgs 64
tunable maxdsiz 2147483648
tunable max_thread_proc 512
tunable executable_stack 1
tunable dbc_min_pct 50
tunable dbc_max_pct 90
tunable nstrpty 60
=====================

Best regards,
David Libby

[Pete Randall]

David,

I would suggest that, if you set your 11.23 kernel up based on your 11.11 tweakings, you will probably not have to do any further tweaking. I tend to be rather generous in setting my kernel parameters - after all, it only costs a few extra bytes of memory to hold most of the additional kernel structures you're creating and, in today's large memory systems, that little difference will never be noticed.


Pete

[David Libby_4]

Hi Pete,

Well, that sounds logical... but surely there must be kernel paramater templates out there.

It really surprises me that Legato and HP don't provide a list of paramaters considering that the out-of-the-box set are almost never sufficient.

Regards,
David

[David Libby_4]

There's a concurrent thread going on over at "comp.sys.hp.hpux" and we seem to be getting closer to a finalised parameter set for this combo. As and when it comes to fruition, I'll post it up here (with the reasoning for each setting).