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тАО01-20-2005 04:26 AM
тАО01-20-2005 04:26 AM
Re: memory allocation for programs
I tried the ps -o but the ps cmd did not like the RSS or VSZ. It gives the msg - "ps: unknown variable in format: RSS".
I was wrong about the stack size not changing in my previous msg. The size did change.
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тАО01-20-2005 04:31 AM
тАО01-20-2005 04:31 AM
Re: memory allocation for programs
Just use 'man ps' and '/RSS'
Hein.
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тАО01-20-2005 04:44 AM
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тАО01-20-2005 04:57 AM
тАО01-20-2005 04:57 AM
Re: memory allocation for programs
Tom Wallin
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тАО01-24-2005 02:42 AM
тАО01-24-2005 02:42 AM
Re: memory allocation for programs
Tom Wallin
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тАО02-28-2005 03:07 AM
тАО02-28-2005 03:07 AM
Re: memory allocation for programs
We started with a program that was taking 10MB of RSS per user. It turns out that the program itself takes 1.8MB of RSS. Another 3.6MB was taken when vm_segmentation was set to 1. This setting causes all libraries referenced by the program to be loaded with it into memory. This was for security purposes.
And the last amount of RSS 4.6MB was taken because we had the aio_task_max_num set to 60108. This setting causes the initialization routines in libaio to allocate 60108 aio result blocks. These are used to contain context for outstanding aio requests. At 80 bytes per result block the resulting memory allocation is 587 pages (4.6 Mbytes).
We think that the 60108 was set for Database purposes. But we are unsure why. We did not need the setting for Informix.
Tom Wallin
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