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Re: kswapd taking 100% CPU - only there's no swap?





Arjan van de Ven wrote:
On Mon, 2006-03-06 at 16:27 -0800, Don MacAskill wrote:
We have an 8-way RHEL4 AS system (4 dual-core Opterons) with no swap (because swapping is still broken for DB loads. It swaps the DB out in preference of disk cache).

zero swap is a really bad idea. At least make a 10Mb or so swap.



I hear you, and will try it, but can you explain why zero swap is a bad idea?

I don't want any disk activity. I have ample RAM (32GB, of which I leave >3GB free at all times).

I have plenty of diskless boxes which obviously have no swap. Are you saying that I can't/shouldn't run diskless either?

Why on earth would no swap be such a bad idea if I'm no-where near starved for RAM?

Don


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