Re: Oracle 9.2.0.1 swap reservation on hp-ux 11

Hi Arek

HPUX by default is configured to use 'pseudo' swap (this can be disabled by setting a kernel parameter if not required). By default the kernel will take 75% of the physical memory size for the psuedo swap. As indicated by its name this swap does not actually exist anywhere. So this may explain the 2GB.

Also, checking the size parameter and multiplying by the number of processes is also not a true guide as much of a normal processes size is taken by shared libraries.

HTH KJP Arkadiusz Malinowski wrote:
> Each Oracle process reserve memory in swap minimum 16384 pages (SZ column)
> (as set kernel parameter maxswapchunks, )
> So total memory reserved only by oracle is 2GB but used is only 340MB?
> Is there any way to reconfigure oracle to reserve less swap memory?
> Why is this happen?
>
> thanks,
> Arek
>
>
> swapinfo -mt
> Mb Mb Mb PCT START/ Mb
> TYPE AVAIL USED FREE USED LIMIT RESERVE PRI NAME
> dev 2048 344 1704 17% 0 - 1 /dev/vg00/lvol2
> dev 3000 0 3000 0% 0 - 2 /dev/vg01/swap02
> reserve - 2031 -2031
> memory 306 113 193 37%
> total 5354 2488 2866 46% - 0 -
>
>
> ps -elf
> F S UID PID PPID C PRI NI ADDR SZ WCHAN
> STIME TTY TIME COMD
> 1001 S oracle 1026 1 0 154 20 42ea6400 16530
> 42aad468 17:28:08 ? 0:07 oraclewire (LOCAL=NO)
>
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Received on Thu Nov 28 2002 - 16:09:52 CST