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тАО09-12-2009 03:12 AM
тАО09-12-2009 03:12 AM
I have server "ia64 hp superdome server SD64B",
I received a request from Application team to increase the size to 48GB as equal to physical memory size. My question how i could know the biggest segment size so according to that i can make my decesion?
Regards,
Solved! Go to Solution.
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тАО09-12-2009 03:55 AM
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тАО09-12-2009 09:57 AM
тАО09-12-2009 09:57 AM
Re: maxdsiz_64bit
The reason we limit these values is to ensure that a single process doesn't consume all the available memory. Remember, a process's view of memory is via its Virtual Address Space. A 64-bit process thinks it has access to 16EB of memory. This is the theoretical limit of a 64-bit operating system. HP-UX currently uses only 44 of the 64 bits. This limits the size of the entire address space to only 16TB. This should be enough for the foreseeable future. The fact that HP-UX uses the memory partitioning, known as quadrants, has an effect on how the address space is used.
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тАО09-12-2009 08:03 PM
тАО09-12-2009 08:03 PM
Re: maxdsiz_64bit
This is most likely a hardware restriction, not software.
>that HP-UX uses the memory partitioning, known as quadrants
This is for PA or Integrity 32 bit. For 64 bit, there are octants and that comes the high order bits.
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тАО09-13-2009 01:30 AM
тАО09-13-2009 01:30 AM
Re: maxdsiz_64bit
maxssiz
maxtsiz
Regards,
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тАО09-13-2009 01:59 AM
тАО09-13-2009 01:59 AM
Re: maxdsiz_64bit
maxtsiz: the maximum size of a code/text segment
maxdsiz: the maximum size of the user/private data segment
maxssiz: the maximum size of the user stack segment
>Dennis: This is for PA or Integrity 32 bit. For 64 bit, there are octants and that comes the high order bits.
probably you are right, my notes seem little bit older. do you know any document about this topic recent updated ?
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тАО09-13-2009 07:10 PM
тАО09-13-2009 07:10 PM
Re: maxdsiz_64bit
It should be directly related to the Itanium hardware and instruction set.
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тАО09-14-2009 03:39 AM
тАО09-14-2009 03:39 AM