Recently we measured the performance penalty from the Meltdown fix on Ubuntu servers. It turned out to be negligible.
Today, Ubuntu made a Spectre bug fix on Ubuntu available, shipped in kernel 4.4.0-112. As with the Meltdown fix, we measured the effect of this update. Unfortunately, we observed a major performance penalty on MySQL workloads with this new kernel.
Our benchmark used the following:
- 2 x Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz (Codename Haswell)
- /proc/cpuinfo has 48 …