Spectre & Meltdown
Obviously there has been a lot of chatter about Spectre and Meltdown. Here is some, limited, info about patching and mitigation from some the vendors. Patches are available for most products, with some limiting factors. With the scope of these vulnerabilities some performance impact can be expected. Redhat's Performance Team released the following information about the mitigation of these CVS on (most likely) redhat systems:
Measureable: 8-19% - Highly cached random memory, with buffered I/O, OLTP database workloads, and benchmarks with high kernel-to-user space transitions are impacted between 8-19%. Examples include OLTP Workloads (tpc), sysbench, pgbench, netperf (< 256 byte), and fio (random I/O to NvME).
Modest: 3-7% - Database analytics, Decision Support System (DSS), and Java VMs are impa