I would like to know from you gurus out there if there will be a performace drop when the operating system is located along with a RAID array in time when any paging ( swap ) operations are done.
That doesn't make much sense. I'm going to assume you're asking if performance will degrade when you put your swap partitions on a RAID array.
The answer is: depends on what type of RAID.
It would be silly to put your swap space on a RAID 5 array. Doing so would definitely hurt performance, since swapping data out would incur the additional overhead of reading all of the stripes in the array, calculating the parity, and writing both the parity and the data swapped out.
However, placing your swap partitions on a RAID 0 array with a small strip size will almost certainly increase the speed of paging both in and out by balancing the disk activity across several disks.
RAID 1 would probalby speed paging in to system RAM, but hurt paging out if you're using software RAID. Probably a net loss, in that case.
Even in a trial testing installation which i did to test this out i found a performance drop.
Using RAID 5, I would assume. Try on a RAID 0 volume with a small "chunk-size" (assuming you're using software RAID.... experiment to find the best values).
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