[erlang-questions] Unexpected behavior of HTTPC module - tls_connection process take more memory

Eranga Udesh <>
Tue Sep 8 10:06:22 CEST 2015


Hi Antoine,

It doesn't seem to be related to the SSL Session Cache issue. As seen their
ETS size is only 29692.

Regards,
- Eranga

On Tue, Sep 8, 2015 at 12:19 PM, Antoine Koener <>
wrote:

> Hi,
>
> This problem reminds me of something related to  SSL connection cache.
> I'm sure that on this mailing list this have been discussed many times
> before.
> If you search this mailing list archives you may find more information.
>
> Le 7 sept. 2015 à 12:50, Sanath Prasanna <> a écrit :
>
> Hi All,
> Any suggestion on below problem?
> Br,
> Robert
>
> On Mon, Sep 7, 2015 at 9:22 AM, Sanath Prasanna <>
> wrote:
>
>> Hi all,
>>
>> I am running HTTP client using httpc Module to send both http and https
>> requests. normally sending arround 300 request per second without any
>> issue. however sometimes erlang node become very slow responsive. at that
>> time server load average is very high and using etop can identify
>> "tls_connection" process take more memory. when restart the erlang node its
>> become normal. as per my investigation normal time memory, processors,
>> loadAverage is not increasing. following is the HTTP request config
>>
>>
>> httpc:request(Method, Request, [{timeout, TimeoutTime}], [{sync, false}])
>>
>>
>> below is the etop output at that time
>>
>>
>>         procs    1134                        processes 1504844
>> code         9309
>>
>>         runq        0                        atom          420
>> ets         29692
>>
>>
>> Pid            Name or Initial Func    Time    Reds  Memory    MsgQ
>> Current Function
>>
>>
>> ----------------------------------------------------------------------------------------
>>
>> <5490.26428.14>tls_connection:init/     '-'    733224580768       0
>> gen_fsm:loop/7
>>
>> <5490.26429.14>tls_connection:init/     '-'   1328524580768       0
>> gen_fsm:loop/7
>>
>> <5490.26430.14>tls_connection:init/     '-'    528924580768       0
>> gen_fsm:loop/7
>>
>> <5490.26431.14>tls_connection:init/     '-'   1432224580768       0
>> gen_fsm:loop/7
>>
>> <5490.26432.14>tls_connection:init/     '-'       024580768       0
>> gen_fsm:loop/7
>>
>> <5490.26433.14>tls_connection:init/     '-'       024580768       0
>> gen_fsm:loop/7
>>
>> <5490.26434.14>tls_connection:init/     '-'       024580768       0
>> gen_fsm:loop/7
>>
>> <5490.26435.14>tls_connection:init/     '-'       024580768       0
>> gen_fsm:loop/7
>>
>> <5490.26436.14>tls_connection:init/     '-'       024580768       0
>> gen_fsm:loop/7
>>
>>
>> can some one help me to solve this issue?
>>
>> Br,
>>
>> A.H.E. Robert
>>
>
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