On Tue, Apr 7, 2015 at 12:37 AM, Garrett Cooper <yaneurab...@gmail.com> wrote:
> Hi,
> Long story short, I had a lot of mail spooled up in /var/spool. When
> I did ls /var/spool, ZFS chewed up almost all 12GB of my memory in <10 mins
> (because there were enough files there) and the system eventually panicked
> because [I assume that a memory allocation failed and] a trap 12 panic was
> caught. I don’t have the exact details, but it should be relatively easy to
> repro (YMMV if you have a boatload of RAM):
>
> repro_end=10000000000
> for i in $(seq 1 $repro_end); do mktemp tmp.XXXXXXXXXXXX; done
> ls
>
> This might be ameliorated via r281026, but this change is only
> available in CURRENT (so far), and I haven’t tested it.
> Are there any comments about this scalability issue with FreeBSD/ZFS?
> Thanks,
I spent the last ~ 24 hours creating 58,567,635 empty files in one
directory. I can ls it without crashing on a machine with 32 GB RAM.
# /usr/bin/time -l ls /tmp/tmp | wc
1061.21 real 225.54 user 36.61 sys
9720268 maximum resident set size
28 average shared memory size
8 average unshared data size
128 average unshared stack size
2425013 page reclaims
0 page faults
0 swaps
108036 block input operations
0 block output operations
0 messages sent
0 messages received
0 signals received
108004 voluntary context switches
2428 involuntary context switches
58567635 58567635 644243985
-Alan
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