[Bug 220971] Freebsd 11.0p11 - system freeze on intensive I/O

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Sat Aug 12 11:09:26 UTC 2017


https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=220971

--- Comment #6 from Mark Millard <markmi at dsl-only.net> ---
(In reply to execve from comment #4)

FYI since you have more RAM than the original
context for that stress command I'll quote
from the man page:

       -m, --vm N
              spawn N workers spinning on malloc()/free()

       --vm-bytes B
              malloc B bytes per vm worker (default is 256MB)

       -d, --hdd N
              spawn N workers spinning on write()/unlink()

       --vm-keep
              redirty memory instead of freeing and reallocating

So:

stress -d 2 -m 3 --vm-keep

is only doing 3*256MB = 768MB of VM use.

That was a large percentage of the 1GB of RAM that
the related bugzilla 206048 indicated as the context
for the command. It is not that much of around
8GiBytes of RAM.

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