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тАО03-14-2007 07:24 AM
тАО03-14-2007 07:24 AM
One of my HP-UX servers running v11.00 on a N4000 hardware has a consistent 79%utilization of nfile. Now the application requires to upgrade the nfile parameters. Present value is 250000. Other suporting kernel parameters are:
maxusers=2048
nproc = 20500
npty= 256
This server has a good amount of 14 Gig memory. The o/p of glance (process details)is attached.
Now, can I get some information about the following:
1.Upto how many Gig, I can upgrade my physical memory?
2.If I upgrade my memory, upto what extend can I upgrade my nfile value without affecting the memory utlization? I mean to ask the proportionate value of nfile?
Thanks!
Raj
Solved! Go to Solution.
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тАО03-14-2007 07:32 AM
тАО03-14-2007 07:32 AM
SolutionBut ofcourse, increasing nfile to an extrmely high value would mean the kernel image will be bigger to accomodate the structures.
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тАО03-14-2007 07:32 AM
тАО03-14-2007 07:32 AM
Re: nfile utilization and requirement
First, disregard any formula used to calculate the 'nfile' setting. Simply choose a value for 'nfile' that meets your needs.
The value of 'nfile' represents the number of slots in a kernel table used to track open files. The memory required per slot is minimal, so increasing 'nfile' has very little affect on overall memory consumption.
Regards!
...JRF...
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тАО03-14-2007 07:35 AM
тАО03-14-2007 07:35 AM
Re: nfile utilization and requirement
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тАО03-14-2007 08:17 AM
тАО03-14-2007 08:17 AM
Re: nfile utilization and requirement
Raj
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тАО03-14-2007 01:33 PM
тАО03-14-2007 01:33 PM
Re: nfile utilization and requirement
Bill Hassell, sysadmin
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тАО03-14-2007 01:55 PM
тАО03-14-2007 01:55 PM
Re: nfile utilization and requirement
MY current nfile value is 250,000 and it is being utilized around 79% of this value! That is the reason behind this requirement. I got a recommendation from the vendor that I can go upto 350,000 with the current memory size(14 gig), but there could be a 5-10% more memory utilization. So I am going to try this value and test.
Thanks for your valuable time.
Raj
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тАО03-15-2007 07:44 AM
тАО03-15-2007 07:44 AM
Re: nfile utilization and requirement
The vendor's quote must be referring to the increase in the number of additional processes because 5-10% of 14Gb is 700 to 1400 megs and 100,000 increase in nfile won't be be more than a few dozen megs of kernel memory. You can certainly bump the value up to 350k or even 500k and then reboot to see how much space the kernel is now using.
Bill Hassell, sysadmin