[erlang-questions] ssl_connection process hibernation option

Ingela Andin <>
Mon Feb 7 09:28:44 CET 2011


Hi!

It is already on github on our dev-branch and will be part of the next
release.

Regards Ingela Erlang/OTP team - Ericsson AB

2011/2/4 Kaiduan Xie <>:
> Ingela,
>
> This is a great news, Ingela. When can we have this improvement?
>
> Best regards,
>
> /Kaiduan
>
> On Fri, Feb 4, 2011 at 10:51 AM, Ingela Andin <> wrote:
>> Hi!
>>
>> We already put some effort into cleaning the state of the gen_fsm
>> processes holding the connection,
>> but some form of hibernation could be interesting too we will take
>> this into consideration.
>>
>> Regards Ingela Erlang/OTP team - Ericsson AB
>>
>> 2011/2/4 Jeroen Koops <>:
>>> I would very much appreciate this too.
>>>
>>> As a test, I inserted a proxy-module between the gen_fsm and ssl_connection
>>> callback, that changes all responses from the ssl_connection callback to
>>> include the 'hibernate' option (it's not a hack -- it's AOP!) and the
>>> savings are dramatic: before the change an SSL connection used around 350
>>> kB, after the change only around 600 bytes. If a system is maintaining
>>> thousands of SSL connections, this really adds up.
>>>
>>> If we could somehow get hibernation built in to the ssl application, that
>>> would be great.
>>>
>>> On Fri, Feb 4, 2011 at 9:57 AM, Ferenc Holzhauser <
>>> > wrote:
>>>
>>>> Hi,
>>>>
>>>> I'm using R14B01 new SSL to set up a lot of (not very active) client
>>>> connections.
>>>>
>>>> I have noticed that ssl_connection processes use a lot of memory between
>>>> GC's.
>>>> A forced GC makes them small again until the next piece of received data.
>>>>
>>>> This adds up to a significant memory usage (around 350-400 kB/session on a
>>>> x64 system in my case) limiting the number of possible sessions.
>>>>
>>>> An option to hibernate this gen_fsm would decrease the average memory usage
>>>> in this scenario.
>>>>
>>>> Would it be possible to introduce this option?
>>>>
>>>> Thanks in advance,
>>>> Ferenc
>>>>
>>>
>>
>> ________________________________________________________________
>> erlang-questions (at) erlang.org mailing list.
>> See http://www.erlang.org/faq.html
>> To unsubscribe; mailto:
>>
>>
>


More information about the erlang-questions mailing list