Ahh, composable-kernel. The highest offender in the list of software that have produced unrecoverable OOMs in my Gentoo system (it’s actually Clang while compiling CK, which uses upwards of 2.5GB per thread).
I was recently reviewing a CK package for Debian. My test build crashed due to OOM using -j32 on a 64GB workstation, so I tried with -j1 to be safe. That completed successfully after 190 hours!
I think I may need to reduce the number of architectures it's built for to successfully compile it on the official Debian buildd infrastructure, but my (unverified) understanding is that most of its reverse dependencies only need the header-only parts of the library anyway.
I'm told they're working on improving the build times via a few different methods.
Same, -j32 with 64GB on a 3950x. I use 50% of ZRAM, but it’s still not enough most of the times, so I had to make a config called less-threads that only uses 24, with ZRAM enabled.
I also use OOMD, but I have to work on separating my systemd units better, OOMD has killed my greetd session before, and with that my entire tree of userland processes :D
I think I may need to reduce the number of architectures it's built for to successfully compile it on the official Debian buildd infrastructure, but my (unverified) understanding is that most of its reverse dependencies only need the header-only parts of the library anyway.
I'm told they're working on improving the build times via a few different methods.