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Re: E-mail Server Replacement




On Nov 16, 2007, at 10:21 AM, Dan Shoop wrote:


On Nov 15, 2007, at 9:46 PM, Kevin Windham wrote:


On Nov 15, 2007, at 7:21 PM, Dan Shoop wrote:

Pageout metrics alone aren't going to be telling enough. Especially since most of the pages you'd be dealing with wouldn't get paged out through the page files anyway.

You're probably right. I assumed some other things. I should have added that the free mem will be close to 0 and the pageout number will be increasing quickly.

Actualy Free Mem at zero is a goal state.

I'd have to disagree with you on that. Maybe I'm misinterpreting what you've written, but I've only seen bad things happen when free mem gets to 0. Normally any increase in load at that point leads to thrashing in my experience. So I would never advise anyone that free mem at 0 is a goal.


And again, pageouts only occur for pages that are paged out.

I agree completely. ;-)

ro pages like those of mail messages are unlikely candidates for pagefiles since they already have backing store elsewhere.

I'm not sure what actually gets paged out and when, I just know from experience that if you don't have enough RAM then pageouts will occur and if the load on the system doesn't decrease it leads to disk thrashing and general unhappiness for everyone trying to work off that machine.


Regards,
Kevin
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References: 
 >E-mail Server Replacement (From: Mark Spidle <email@hidden>)
 >Re: E-mail Server Replacement (From: Kevin Windham <email@hidden>)
 >Re: E-mail Server Replacement (From: Dan Shoop <email@hidden>)
 >Re: E-mail Server Replacement (From: Kevin Windham <email@hidden>)
 >Re: E-mail Server Replacement (From: Dan Shoop <email@hidden>)



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