I followed those. I got nothing. — Sent from Mailbox for iPhone On Wed, Jul 3, 2013 at 5:24 AM, Darac Marjal <mailingl...@darac.org.uk> wrote:
> On Tue, Jul 02, 2013 at 08:54:06PM -0400, Will Platnick wrote: >> I am experiencing some issues with load after upgrading some of my Squeeze >> boxes to Wheezy. I have 7 app servers, all with identical hardware with >> identical packages and code. I upgraded one of my boxes to wheezy, along >> with the custom packages we use for Python, PHP, etc… Same versions of the >> software, just built on Wheezy instead of Squeeze. My problem is that my >> Wheezy boxes have a load of over 3 and are not staying up during our peak >> time, whereas our squeeze boxes have a load of less than 1. >> The interesting part, is that despite the high load, my wheezy boxes are >> actually performing quite well, and are outperforming my squeeze boxes by >> 2-3 ms. Never the less, the high load is giving us cause for concern and is >> stopping us from migrating completely, and we're wondering if anybody else >> is seeing the same thing or can give us some assistance on where to go from >> here. >> I believe I have tracked down the issue with our load to be an interrupt >> issue. My interrupts on wheezy are way higher. CPU, I/O, Memory and Context >> Switches are all the same (measured with top, atop, iotop, vmstat). It >> doesn't appear to be a hardware issue, as I deployed wheezy and our code >> base to a different and faster motherboard/cpu combo, and the issue remained. >> The items that stands out is that my "Rescheduling Interrupts" and "timer" >> are interrupting like crazy on wheezy compared to squeeze. Here is my output >> of total interrupts on Squeeze vs Wheezy for two different machines, >> rebooted and placed into service at the exact same time, with traffic >> distributed to them via round robin, so it should be fairly equal. >> Rescheduling Interrupts: 4109580 on Wheezy vs 67418 on Squeeze. >> Timer: 504238 on Wheezy vs 50 on Squeeze. >> >> Thoughts? Suggestions? > This was the first search result for "Rescheduling Interrupts". The > advice should apply to Debian equally well. > https://help.ubuntu.com/community/ReschedulingInterrupts
