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тАО08-23-2001 05:53 AM
тАО08-23-2001 05:53 AM
I have to install IBM MQ Series on two of my boxes. I installation guide I see SEMMNU=2048. That works for HP-UX10.20, but when I try to change it for HP-UX11 it give me the message:
Error: One or more tunable parameters violates an interdependency rule. SAM expects the following expression(s) to be true: semmnu <= (nproc-4)
Can I avoid limitation of the formula for this parameter?
Applied Kernel Parameter Set is General OLTP/Database Server System.
Thanks,
Troy.
Solved! Go to Solution.
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тАО08-23-2001 06:02 AM
тАО08-23-2001 06:02 AM
Re: kernel parameters
...jcd...
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тАО08-23-2001 06:11 AM
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тАО08-23-2001 06:13 AM
тАО08-23-2001 06:13 AM
Re: kernel parameters
I think you can override the formula limitation if you set it from command line( i am not 100% sure ) though I suggest you not to.
Anyway the commands for changing the values from command line are
kmtune -s semmnu=2048
mk_kernel -v -o /stand/vmunix
Then reboot the machine.
Hope this helps...
...BPK...
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тАО08-23-2001 06:28 AM
тАО08-23-2001 06:28 AM
Re: kernel parameters
Some calculations:
semmnu=nproc-4
nproc=(((10*MAXUSERS)/3)+128)
If I want semmnu=2048 then MAXUSERS=574, but when I try to change MAXUSERS I get:
The parameter modification(s) you have made have resulted in at least
one parameter evaluating to a value which is greater than its maximum
allowable value. Parameter "msgseg", currently set to "(MSGTQL*4)",
has evaluated to "71440", which is greater than its maximum allowable
value of "32767".
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тАО08-23-2001 06:50 AM
тАО08-23-2001 06:50 AM
Re: kernel parameters
STRMSGSZ 65535
max_thread_proc 256
maxfiles 2048
maxfiles_lim 2048
maxswapchunks 700
maxuprc 300
maxusers 300
msgmax 65536
msgmnb 65536
msgmni 350
msgseg 7168
msgssz 1024
msgtql 1024
ncallout 3000
nkthread 2048
nstrpty 60
o_sync_is_o_dsync 1
semaem 32767
semmni 4980
semmns 16384
semmnu 2048
semume 256
semvmx 65535
shmmni 1024
shmseg 1024
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тАО08-23-2001 06:52 AM
тАО08-23-2001 06:52 AM
Re: kernel parameters
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тАО08-23-2001 07:42 AM
тАО08-23-2001 07:42 AM
Re: kernel parameters
1. You may increase your nproc to a greator value ( 2068 for example ).
OR
2. You may modify the formula :
semmnu <= (nproc-4)
by
semmnu <= (nproc-4 + 1500)
Magdi
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тАО08-23-2001 07:58 AM
тАО08-23-2001 07:58 AM
Re: kernel parameters
:-), this is exactly what I am trying to do! How to do it?
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тАО08-23-2001 08:19 AM
тАО08-23-2001 08:19 AM
Re: kernel parameters
increasing MAXUSERS has an effect on serveral kernel settings which might or might not be relevant for your system.
Personally I would increase nproc (fix number instead of formula) and semmnu.
(next to kmtune you can always use sam to modify the kernel parameters.)
good luck,
Thierry.