SWAP Size and FS Size

[George Nikoloudis_1]

The swap parameter maxswapchunks = 4096 and the FS block size 8192 is there a problem in the performance?
I read that these two should be the same. Is this true?

[A. Clay Stephenson]

Not at all, maxswapchunkx limits the maximum amount of swapspace in your case
4096 X 2048 (swchunk) X 1024 (dev_blksize) = 8GB. (Don't change swchunk). The filesystem blocksize has nothing to do with this.

By the way, you almost certainly should be using vxfs filesystems and the blocksize has no real performance impact unlike hfs filesystems.

[Satish Y]

No need to be same and also u r using max limit of maxswapchunks value... u can't increase more that that....

Cheers...
Satish.

[Sridhar Bhaskarla]

Block size and maxswapchunks are two entirely different parameters. Probably you might have read about swchunk size that along with maxswapchunks determines the maximum swap space that can be configured on the system. There would be no performance hit for any of these parameters except that you want to keep any of the kernel parameters not too high.

-Sri