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We've had problems in R15B01 with particular statistics functions
related to schedulers, as described in
<a class="moz-txt-link-freetext" href="http://erlang.org/pipermail/erlang-bugs/2012-July/002964.html">http://erlang.org/pipermail/erlang-bugs/2012-July/002964.html</a> <br>
<br>
To date there is no solution and we just stopped using these
functions, going back to run queues.<br>
<br>
We also have seen a non-negligible increase in CPU usage from R14B*
versions, easily around 20% or so during regular workload, although
it didn't seem to affect heavy overload situations too negatively
for us (no precise measurements were made for this, just casual
observations). It remained high no matter what arguments we gave to
the VM.<br>
<br>
We have noticed nodes getting locked-up in R15B01 from time to time
when memory on the server is getting rare, taken by other
applications -- it seemed we had a lot of contention on proc_tab
mutexes, but nothing came out of it. We eventually reduced memory
usage in other applications and things have been rather stable since
then.<br>
<br>
Other than that, everything appeared normal, and none of the
blocking incidents could be directly attributed to issues you appear
to have. We haven't seen memory ballooning except in occasional
error logger cases, but most of our processes are extremely
short-lived (well under <150ms). <br>
<br>
<div class="moz-cite-prefix">On 12-09-19 4:11 PM, Rapsey wrote:<br>
</div>
<blockquote
cite="mid:CALDM7ZEfSL6w=UV6M002H=HNra77_zt0idb0Ts=Rdzpte=kDxA@mail.gmail.com"
type="cite">We run a network of custom built streaming servers
doing video streaming and transcoding of IPTV channels.
<div>On R14 everything runs great. But switching to R15,
gen_servers inexplicably block and don't respond to messages,
even the console blocks and does not respond to input for 30s or
so, processes baloon taking up large amounts of memory for no
reason. All at random times, but gets much worse once there are
more users connected to the server doing a lot of req/s or
receiving a lot of data.</div>
<div>We're running ubuntu server and start erlang with these
switches:</div>
<div>erl +Bd +S 4 +P 1000000 -env ERL_MAX_PORTS 100000 +K true +A
32</div>
<div><br>
</div>
<div>Are we alone having problems with R15? We tried R15B01 and
R15B02.</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>Sergej</div>
<br>
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