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Re: Recommended/Not Recommended Hosts?

From: Jason DiCioccio <jd(at)ods(dot)org>
To: Josh Berkus <josh(at)agliodbs(dot)com>
Cc: Josh Livni <josh(at)umbrellaconsulting(dot)com>, SF Postgres <sfpug(at)postgresql(dot)org>
Subject: Re: Recommended/Not Recommended Hosts?
Date: 2009-12-10 19:55:11
Message-ID: (view raw, whole thread or download thread mbox)
Lists: sfpug
On Thu, Dec 10, 2009 at 11:20, Josh Berkus <josh(at)agliodbs(dot)com> wrote:
> On EC2, other VMs on the same hardware are permitted to "steal" portions
> of the CPU which are allocated to you.  So at any given time, you may
> have as little as 50% of the CPUs you're being billed for.  And, when
> CPU availability is fluctuating up and down (as it does on EC2), real
> throughput tends to be based on the slowest second rather than peak
> availablity.  Most Linux apps, especially databases, do quite poorly
> with erratic resource availability.

Just to clarify, Joyent does this too, no?  Or is it just that the
Solaris scheduler handles the prioritization of tasks/resources
better?  I haven't yet had the chance to use Joyent, but I thought
this was one of their selling points.

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