[GTALUG] Meltdown performance hit.

Alvin Starr alvin at netvel.net
Thu Jan 11 23:35:23 EST 2018

On 01/11/2018 11:19 PM, Jamon Camisso via talk wrote:
> On 11/01/18 19:13, Alvin Starr via talk wrote:
>> Its a paravirt VM.
>> The steal time is much less than 1% bouncing between 0 and 0.2
>> Yes it is possible that other VM's are stealing resources leaving less
>> compute power for my instance but I have had extremely stable cpu
>> utilization going back something like 2 months.
>> But the step is significant within a matter of a day it went from 2.5%
>> utilization to 17.4% utilization in 2 steps.
>> My image is held up by the moderator so I posted here (
>> https://owncloud.netvel.net/s/G3HGQUEb5saLBSn )if your interested.
>> The timing is suspect and I had another server that sees periodic work
>> and it completely collapsed because of the change in performance at just
>> the same time.
>> A bit of searching shows that others are complaining about the same
>> problem.
> That does look like a substantial hit. What happens if you try the
> workload on a new VM? Roll the dice until you get lucky maybe?

This server is not so bad but it really shows the change in performance.
The one that keeled over on me was on a small instance and I had to move 
it to a large instance.
I did a bunch of database clean and hopefully that will be enough to be 
able to put it back on a small instance.
Otherwise my costs at AWS till jump significantly.

Alvin Starr                   ||   land:  (905)513-7688
Netvel Inc.                   ||   Cell:  (416)806-0133
alvin at netvel.net              ||

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