[Bug 230454] Compiling world fails on /usr/src/contrib/llvm/tools/clang/lib/CodeGen/CGCXXABI.cpp

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=230454

--- Comment #8 from Mark Millard <marklmi26-fbsd at yahoo.com> ---
I'll note that folks have been reporting problems
with 1 GiByte machines for -j1 buildworld's based
on the compilation of gmock-matchers_test.cc .
An example is:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241848

It might be better to make such the base so
the information is not as old as here: declare
older submittals as duplicates of the modern
information example?

(llvm materials have grown as well.)

Head has also added an paging/swapping I/O
related OOM criteria (that was temporarily
broken a littel while back). I've not used
a 1 GiBYTe context but I use two settings,
one of which is for avoiding I/O related
kills happening as easilly:

#
# Delay when persistent low free RAM leads to
# Out Of Memory killing of processes:
vm.pageout_oom_seq=120
#
# For plunty of swap/paging space (will not
# run out), avoid pageout delays leading to
# Out Of Memory killing of processes:
vm.pfault_oom_attempts=-1

I do this on 2 GiByte+ contexts to better
avoid OOM kills. vm.pfault_oom_attempts is
head-only last I knew but vm.pageout_oom_seq
is much older.

Some folks have used much larger
vm.pageout_oom_seq values.

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