I use BCC tools weekly to debug production issues. Recently I found we were massively pressuring page caches due to having a large number of loopback devices with their own page cache. Enabling direct io on the loopback devices fixed the issue.
eBPF is really a superpower, it lets you do things which are incomprehensible if you don’t know about it.
eBPF is really a superpower, it lets you do things which are incomprehensible if you don’t know about it.