[THIN] Re: thread quanta and chkroot.cmd thingy
- From: Jim Kenzig <web@xxxxxxxxxx>
- To: thin@xxxxxxxxxxxxx
- Date: Tue, 16 Sep 2003 15:51:21 -0400
In that scenario everyone is getting pushed back to the end of the line every
few minutes...no one ever gets out of the place....in other words no ones task
is ever completed. That would suck for everyone...
--
Regards,
Jim Kenzig
Quoting Joe Shonk <joe@xxxxxxxxxxxxxxxxxxx>:
> The thing is, the user may notice. 60ms vs 180ms is the time allocated per
> thread. If it's just one user, he/she will not notice a difference. But
> as
> more users log into the box, so do the number of threads (provided the
> users
> actually do something, like run an applications. Otherwise, what was the
> point of them logging on).
>
> Think of it like this: You're off to grocery store to buy a package of
> toilet paper. Two checkout lanes are open (as in two CPUs), both lanes
> have
> a queue of 3 carts (threads) each. All 6 carts are filled to the brim. It
> would take an average of 5 minutes each shopper to complete their order.
> Your item would only take 30 secs to process. You're looking at a 15
> minute
> wait to purchase single item. What if the store had a quanta limit. Say
> 2.5 minutes per cart, at the end of 2.5 minutes what's been processed is
> saved and the remaining items in the cart go to the end of the line. So
> with 3 shoppers in front, that's a 7.5 - 8 minute wait (don't for get to
> add
> time for cashier to save current shopper's information and switch to the
> next shopper (Context Switch)). Now let's say the quanta limit is 1 minute
> per cart. Now it's just a 3-3 1/2 minutes wait. Granted, the shoppers
> with
> a full cart will have to wait longer, but those with smaller orders will
> not.
>
> Hopefully, if your grocery store is smart, it will give you a priority
> boost
> and open an express lane. If the queue gets too long, it will open new
> registers and/or higher faster cashier. Maybe add some Hyperthreading and
> add a bagger at each lane. If business is good and the store is small, it
> maybe time to remodel and upgrade the store. Or perhaps it's time to build
> add another store.
>
> Tuning and Optimization of a terminal server is a must, there are many well
> known and well documents tweaks. Personally, I would stick to those. You
> may understand the internal workings of windows better than anyone else but
> that's because you're special. Someday, those servers maybe someone else's
> responsibility and you may not be around to help.
>
> Joe
>
> -----Original Message-----
> From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On
> Behalf
> Of Jim Kenzig
> Sent: Tuesday, September 16, 2003 7:49 AM
> To: thin@xxxxxxxxxxxxx
> Subject: [THIN] Re: thread quanta and chkroot.cmd thingy
>
> And do you really think a enduser will notice the time difference between
> 60
> ms
> and 180 ms? And one other thing I want to know...how do you figure in the
> human
> error of the testing of these things... I mean who is stopping and starting
> the
> stopwatch to time this? Are there computer programs you are using to do
> this?
> If you blink isn't that a few hundred milliseconds lost? How can you be
> sure
> it is accurate?
>
> --
> Regards,
> Jim Kenzig
> Quoting Brian Madden <brian@
>
>
> > My completely theoretical and totally unsubstantiated theory: This
> setting
> > does not matter on a Terminal Server.
> >
> > Brian
> >
> > Brian Madden
> > 202.302.3657
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