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тАО02-24-2006 10:03 AM
тАО02-24-2006 10:03 AM
Re: Sizing servers for Oracle Products
This is one of the nits I have to pick with these new "slim" servers.
For crying out loud - two, TWO!!, slots are not enough for *any* server - like a 3410. Sheesh - I've had more expandibilty in laptops I've used - WHY should a server be that handicapped?!?!?!
Then you get into the issue of just what kind of "ropes" you feed these slots with. EX: slots 7/8 have 1GB bandwidth on the 4440 & the others go from 512MB down to 256MB.
So one *must* be very dilligent in how they populate these slots.
OK - off my soapbox,
Jeff
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тАО02-24-2006 07:38 PM
тАО02-24-2006 07:38 PM
Re: Sizing servers for Oracle Products
Quite Jeff
After all, two pci slots, so you add a single hba card and another 1000Mbps ethernet card and it's full.
But then they've got to lever us to buy the bigger form factor servers somehow eh?
Thanks guys btw for all your suggestions so far, and if anyone has any more information I'd be glad to glean it. After all, as I said further up the list, I've been at this only a matter of months.
Cheers
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тАО02-27-2006 03:33 AM
тАО02-27-2006 03:33 AM
Re: Sizing servers for Oracle Products
Four PA-8700 procs are actually four whole and separate procs. Let's say they are 750Mhz.
2 PA-8800's or 8900's whole be one dual core chip running at 1Ghz. The problem is that these two chips are one core, and are sharing cache. Even HP will tell you that the benchmark for this dual-core chip is only 50% more than a single chip(PA-8800s anyway). This would effectively give you 1.5Ghz of proc power.
This means that you now have basically the SAME total horsepower as two 750 Mhz PA-7500's !
While I've found that this is not quite a true statement (as I have both), it's probably closer than you would be comfortable with.
However, if you're running 440 Mhz or 550Mhz chips (as my older Ls and Ns do), then the upgrade as per your discussion would do you a world of good.
Keep in mind that you mentioned having "2 or 3" procs - dual core chips come in sets of two naturally, and 3 isn't doable.
So, let's say you scale down to 2 procs from four. While you may have the same total HP in Ghz (and probably more than), you will unfortunately have less divisibility for tasks. That means that only two very intensive (and probably not well tuned) tasks can put your server at 100%, leaving poor response for everything else. On your old configuration, you'd only be at 50% at this point. As a case in point, you ever notice that a two proc server *seems* to run about four times faster than than a one proc? It's because on a one proc, ANY meaningfully sized single process and can and will push the server to 100%. So, in your case, it would be two processes as the 100% mark, and after that it's welcome to "time slice and wait" city.
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тАО02-27-2006 03:48 AM
тАО02-27-2006 03:48 AM
Re: Sizing servers for Oracle Products
Thanks John, some things worth mulling over and factoring in.
L-class and N-class generally have 4x 750Mhz PA8700
one N-class has 3x 875Mhz PA8700
No machine has more than 12Gb of RAM
We have N-class machines running as oracle apps servers which I want to replace with smaller (rp3440) machines but as powerful machines. Then redeploy the bigger older machines as database servers for the development environment. I figure I can upgrade both production and development this way for less than it would take to put in a an all new development environment.
That's my current train of thought...
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тАО02-27-2006 08:04 AM
тАО02-27-2006 08:04 AM
Re: Sizing servers for Oracle Products
Also, 9i and 10g take progressively more memory, which is driven in part by the java requirements. If you have a webserver requirement with any sort of middleware to drive the app, you're memory requirements will be even greater.
mark
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тАО02-27-2006 08:18 AM
тАО02-27-2006 08:18 AM
Re: Sizing servers for Oracle Products
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тАО02-27-2006 06:44 PM
тАО02-27-2006 06:44 PM
Re: Sizing servers for Oracle Products
Thanks Mark.
Clay, my only problem with that would be judging the amount by which to handicap the older boxes.
I was thinking I could harvest a little of the old internal hardware to scale up the production database server, but to do that I'd need to purchase more Core i/o, cell board etc which would start to make it exspensive again.
It's all good stuff though guys, every response adds to the knowledge from which eventually I'm going to have to make a decision.
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тАО02-28-2006 02:01 AM
тАО02-28-2006 02:01 AM
Re: Sizing servers for Oracle Products
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