[slurm-users] Extreme long db upgrade 16.05.6 -> 17.11.3

Chris Samuel chris at csamuel.org
Fri Feb 23 15:11:24 MST 2018

On Friday, 23 February 2018 8:04:50 PM AEDT Miguel Gila wrote:

> Interestingly enough, a poor vmare VM (2CPUs, 3GB/RAM) with MariaDB 5.5.56
> outperformed our central MySQL 5.5.59 (128GB, 14core, SAN) by a factor of
> at least 3 on every table conversion.

Wild idea completely out of left field..

Does the production system have the updates for Meltdown and Spectre applied, 
whereas the VM setup does not?

There are meant to be large impacts from those fixes for syscall heavy 
applications and databases are one of those nightmare cases...

 Chris Samuel  :  http://www.csamuel.org/  :  Melbourne, VIC

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