[Bug 275632] process being killed which has a big file mmap'ed and performs writes to it

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275632

--- Comment #2 from Martin Birgmeier <d8zNeCFG@aon.at> ---
Unfortunately not really... the program itself exists since Sep. 2011, and it
was working o.k. for quite some time. In May 2019 I added sleep(3) calls and
removed them immediately afterwards - probably because the problem surfaced
then and I tried to lower the write load, seemingly unsuccessfully.

I am running this only every half a year or so. The problem certainly existed
on 12.3 and 12.4; I switched to stable/14 from 12.4.

There does not seem to be a problem if the write load is rather small; but if a
substantial portion of consecutive stretches of ca. 20 GB needs to be rewritten
the program will be killed.

The machine in question has 16 GB main memory.

-- Martin

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