Recently I was running some benchmarks to double-check that the performance of AMD EPYCs servers delivered by Company A, match the performance of those delivered by Company B. I was using our benchmark automation tool (about which I may write a bit more in the future). It is currently based on sysbench to hammer MySQL instances. Surprisingly, the results have shown very significant difference: B servers were on average 83% slower…
Important behaviour change between bash version 4.3 and 4.4
Please be aware about important behaviour change between bash version 4.3 and 4.4. You can observe it for example while migrating from Oracle Linux 7 to 8/CentOS 7 to Rocky Linux 8/etc. as version 7 of RHEL compatible system comes with bash 4.2, whereas version 8 with bash 4.4.
Change is the only constant... 