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тАО07-15-2008 12:16 AM
тАО07-15-2008 12:16 AM
HP UX minimum needed RAM
My HP UX box is eating approx 26% of its Physical RAM (for a total 4 Gigs is more than 1 Gigs used) when the server just started (no additional services started).
I just found somewhere that HP UX minimum RAM requirement is 128MB, so I think there's some or most services can be stopped to free the mem.
using sam, in network services, I only enabled the FTP server, the other is disabled. Can any of you suggest me how I can free the memory, to reach the minimum required memory?
I only needed ftp and ssh network service. I'm using VxFS.
TIA
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тАО07-15-2008 12:38 AM
тАО07-15-2008 12:38 AM
Re: HP UX minimum needed RAM
dbc_max_pct
dbc_min_pct
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тАО07-15-2008 01:43 AM
тАО07-15-2008 01:43 AM
Re: HP UX minimum needed RAM
Basically what is important here is swapspace. What is "swapinfo -tam"?
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тАО07-15-2008 03:36 AM
тАО07-15-2008 03:36 AM
Re: HP UX minimum needed RAM
dennis: afaik, the swap will not be used if the physical memory is still avalaible, and my concern is how to minimize the OS usage of Physical Memory, but thanks for your suggestion..
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тАО07-15-2008 03:43 AM
тАО07-15-2008 03:43 AM
Re: HP UX minimum needed RAM
If this can be swapped out, then you don't worry too much about this and add device swap.
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тАО07-15-2008 03:51 AM
тАО07-15-2008 03:51 AM
Re: HP UX minimum needed RAM
I think you may have misunderstood the 'minimum' requirement. If you are trying to reduce the memory that is currently used by the processes and the kernel, you must stop all services. Look in /sbin/init.d/ for the service list. If you wnat to see what processes are using RAM, use this command:
UNIX95=1 ps -eo vsz,pid,ppid,args | sort -rn | head -20
That sorts the processes by memory used. But what is the purpose to reduce memory? You have 4Gb so you have plenty of memory for typical applications. Are some of your programs getting "out of memory" or errno 12 messages? These error do not refer to physical RAM at all. They refer to the program's ability to request additional memory and for archaic 32 bit programs, there are severe limitations for the maps used by such programs.
The kernel may also have several parameters that are far too large (ninode, dbc_max_pct, dbc_min_pct), possibly drivers that are not needed.
Bill Hassell, sysadmin
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тАО07-15-2008 04:31 AM
тАО07-15-2008 04:31 AM
Re: HP UX minimum needed RAM
Actual memory requirements vary per version.
HP-UX 11.00 probably would run in some kind of slow awful way in 128 MB of RAM.
As the version number increases the memory requirement increases.
Since you don't state your version, there is not an answer possible to your question.
SEP
Owner of ISN Corporation
http://isnamerica.com
http://hpuxconsulting.com
Sponsor: http://hpux.ws
Twitter: http://twitter.com/hpuxlinux
Founder http://newdatacloud.com
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тАО07-15-2008 04:36 AM
тАО07-15-2008 04:36 AM
Re: HP UX minimum needed RAM
http://docs.hp.com/en/5992-3364/ch02s01.html
What version do you have?
Hope this helps!
Regards
Torsten.
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