[Bug 197884] System with zfs freezes if emulators/virtualbox-ose got all ram

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197884

don bright <hmbright at fastmail.com> changed:

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                 CC|                            |hmbright at fastmail.com

--- Comment #3 from don bright <hmbright at fastmail.com> ---
I have been experiencing a similar problem.

I am trying to compile OpenSCAD master git (http://www.openscad.org) on FreeBSD
10.3 p9 and/or freebsd 11.0 (it wont work with earlier patchlevels, link error)
on various hosting providers and the system is completely locking during the
build.

I have tried cariibou and digitialocean. 
I have tried both clang and gcc.

The problem at first was that it ran out of swap space. OpenSCAD uses CGAL
which is an extremely large c++ template library, so builds can use more than 1
gigabyte of RAM sometimes. 

So I created a swapfile per the freebsd manual , and re-ran the compile. I had
'top' running in another window so I could monitor RAM usage. 

Even with Swap only at about 20% in use, the system still freezes during
compilation. Like vvd, I can ping the machine, but otherwise it is completely
unresponsive. I cannot ssh, I cannot 'ctrl-c' the build, etc. I have to do a
hard shutdown from the hosting provider console. 

Sometime it freezes during the building of the openscad gui, sometimes it
freezes when building the 'test suite' (cd tests ; cmake . ; make ) 

For a comparison, I can build OpenSCAD on FreeBSD inside a QEMU/KVM on my
little laptop and there are no problems. 

Thanks for reading.

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