在 MariaDB 的「MyISAM and KPTI – Performance Implications From The Meltdown Fix」這篇看到頗驚人的數字，這篇提到了他們收到回報 (回報的 ticket 可以參考「[MDEV-15072] Massive performance impact after PTI fix - JIRA」)，說 KPTI (Meltdown Mitigation) 對 MyISAM 效能影響巨大：
Recently we had a report from a user who had seen a stunning 90% performance regression after upgrading his server to a Linux kernel with KPTI (kernel page-table isolation – a remedy for the Meltdown vulnerability).
他們發現 90% 是因為 VMware 舊版本無法使用 CPU feature 加速，在新版應該可以改善不少。但即使如此，文章內還是在實體機器上看到了 40% 的效能損失：
A big deal of those 90% was caused by running in an old version of VMware which doesn’t pass the PCID and INVPCID capabilities of the CPU to the guest. But I could reproduce a regression around 40% even on bare metal.
然後後面就在推銷 MariaDB 的 Aria Storage Engine 了，不是那麼重要... 不過知道 MyISAM 在 KPTI 下這麼傷還蠻重要的，因為接下來五年應該都還是愈的到 KPTI，應該還是有人在用 MyISAM...
