<div dir="ltr"><div><div><div><div>Hi!<br><br></div>You could try using the observer application to find out more information about your system state. <br></div>There is no apparent reason why ssl-7.3 should consume a lot more memory than ssl-6.0.1.2.<br></div>But a lot has append between the versions and heavy load may find corner cases that where missed.<br><br></div>Regards Ingela Erlang/OTP Team - Ericsson AB<br><div><div><div><br><div><div><div><div><div class="gmail_extra"><br><div class="gmail_quote">2016-04-25 14:35 GMT+02:00 <span dir="ltr"><<a href="mailto:vicbaz@yandex.ru" target="_blank">vicbaz@yandex.ru</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello,<br>
<br>
When I run<br>
<a href="https://github.com/ninenines/cowboy/tree/1.0.4/examples/ssl_hello_world" rel="noreferrer" target="_blank">https://github.com/ninenines/cowboy/tree/1.0.4/examples/ssl_hello_world</a><br>
under load (using <a href="https://github.com/JoeDog/siege" rel="noreferrer" target="_blank">https://github.com/JoeDog/siege</a>) I found a big<br>
difference in memory consumption between OTP-17.5 and OTP-18.3. I know<br>
the ssl application has many changes in new versions. Is this memory<br>
usage normal now or can be reduced using some ssl application settings?<br>
<br>
I use OTP-17.5.6.9 and OTP-18.3.1.<br>
<br>
================================================================================<br>
Erlang/OTP 17 [erts-6.4.1.6] [source] [64-bit] [smp:2:2] [async-threads:10] [hipe] [kernel-poll:false]<br>
<br>
1> application:which_applications().<br>
[{ssl_hello_world,"Cowboy Hello World example with SSL.",<br>
"1"},<br>
{cowboy,"Small, fast, modular HTTP server.","1.0.4"},<br>
{ranch,"Socket acceptor pool for TCP protocols.","1.2.1"},<br>
{cowlib,"Support library for manipulating Web protocols.",<br>
"1.0.2"},<br>
{ssl,"Erlang/OTP SSL application","6.0.1.2"},<br>
{public_key,"Public key infrastructure","0.23"},<br>
{crypto,"CRYPTO","3.5"},<br>
{asn1,"The Erlang ASN1 compiler version 3.0.4","3.0.4"},<br>
{stdlib,"ERTS CXC 138 10","2.4"},<br>
{kernel,"ERTS CXC 138 10","3.2.0.1"}]<br>
<br>
2> erlang:memory().<br>
[{total,43913840},<br>
{processes,8036312},<br>
{processes_used,8030744},<br>
{system,35877528},<br>
{atom,470537},<br>
{atom_used,455904},<br>
{binary,1498800},<br>
{code,11074476},<br>
{ets,14516424}]<br>
<br>
3> recon_alloc:memory(used).<br>
45519464<br>
<br>
4> recon_alloc:memory(usage).<br>
0.7212344918526264<br>
<br>
5> recon:proc_window(memory, 10, 500).<br>
[{<0.25910.2>,68120,<br>
[{current_function,{gen_fsm,loop,7}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.25908.2>,68120,<br>
[{current_function,{gen_fsm,loop,7}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.284.0>,15808,<br>
[ssl_manager,<br>
{current_function,{gen_server,loop,6}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.285.0>,12712,<br>
[tls_connection_sup,<br>
{current_function,{gen_server,loop,6}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.25909.2>,5888,<br>
[{current_function,{gen,do_call,4}},<br>
{initial_call,{cowboy_protocol,init,4}}]},<br>
{<0.324.0>,4888,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.302.0>,4808,<br>
[{current_function,{ranch_conns_sup,loop,4}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.330.0>,3016,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.25911.2>,2848,<br>
[{current_function,{gen,do_call,4}},<br>
{initial_call,{cowboy_protocol,init,4}}]},<br>
{<0.340.0>,1872,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]}]<br>
<br>
6> recon:proc_window(reductions, 10, 500).<br>
[{<0.2634.3>,11161,<br>
[{current_function,{gen_fsm,loop,7}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.2633.3>,9747,<br>
[{current_function,{crypto,int_to_bin_pos,2}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.284.0>,4097,<br>
[ssl_manager,<br>
{current_function,{gen_server,loop,6}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.285.0>,3314,<br>
[tls_connection_sup,<br>
{current_function,{gen_server,loop,6}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.302.0>,1003,<br>
[{current_function,{ranch_conns_sup,loop,4}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.378.0>,426,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.372.0>,425,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.379.0>,425,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.377.0>,425,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.343.0>,425,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]}]<br>
<br>
RES in htop ~50-60M<br>
<br>
================================================================================<br>
<br>
Erlang/OTP 18 [erts-7.3.1] [source] [64-bit] [smp:2:2] [async-threads:10] [hipe] [kernel-poll:false]<br>
<br>
1> application:which_applications().<br>
[{ssl_hello_world,"Cowboy Hello World example with SSL.",<br>
"1"},<br>
{cowboy,"Small, fast, modular HTTP server.","1.0.4"},<br>
{ranch,"Socket acceptor pool for TCP protocols.","1.2.1"},<br>
{cowlib,"Support library for manipulating Web protocols.",<br>
"1.0.2"},<br>
{ssl,"Erlang/OTP SSL application","7.3"},<br>
{public_key,"Public key infrastructure","1.1.1"},<br>
{crypto,"CRYPTO","3.6.3"},<br>
{asn1,"The Erlang ASN1 compiler version 4.0.2","4.0.2"},<br>
{recon,"Diagnostic tools for production use","2.3.1"},<br>
{stdlib,"ERTS CXC 138 10","2.8"},<br>
{kernel,"ERTS CXC 138 10","4.2"}]<br>
<br>
2> erlang:memory().<br>
[{total,949153560},<br>
{processes,902969888},<br>
{processes_used,902558312},<br>
{system,46183672},<br>
{atom,437761},<br>
{atom_used,432875},<br>
{binary,48320},<br>
{code,11407283},<br>
{ets,883640}]<br>
<br>
3> recon_alloc:memory(used).<br>
863194560<br>
<br>
4> recon_alloc:memory(usage).<br>
0.8005009562139471<br>
<br>
5> recon:proc_window(memory, 10, 500).<br>
[{<0.290.0>,94360,<br>
[ssl_manager,<br>
{current_function,{ssl_manager,handle_cast,2}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.13589.3>,24640,<br>
[{current_function,{ssl_manager,validate_session,3}},<br>
{initial_call,{ssl_manager,init_session_validator,1}}]},<br>
{<0.291.0>,12832,<br>
[tls_connection_sup,<br>
{current_function,{gen_server,loop,6}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.13590.3>,10960,<br>
[{current_function,{gen,do_call,4}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.318.0>,7904,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.308.0>,3056,<br>
[{current_function,{ranch_conns_sup,loop,4}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.385.0>,1872,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.254.0>,0,<br>
[code_server,<br>
{current_function,{code_server,loop,1}},<br>
{initial_call,{erlang,apply,2}}]},<br>
{<0.325.0>,0,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.357.0>,0,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]}]<br>
<br>
6> recon:proc_window(reductions, 10, 500).<br>
[{<0.290.0>,232358,<br>
[ssl_manager,<br>
{current_function,{gen_server,loop,6}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.291.0>,3058,<br>
[tls_connection_sup,<br>
{current_function,{gen_server,loop,6}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.308.0>,1129,<br>
[{current_function,{ranch_conns_sup,loop,4}},<br>
{initial_call,{proc_lib,init_p,5}}]},<br>
{<0.339.0>,435,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.340.0>,430,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.355.0>,430,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.353.0>,430,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.334.0>,430,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.366.0>,430,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]},<br>
{<0.360.0>,430,<br>
[{current_function,{prim_inet,accept0,2}},<br>
{initial_call,{ranch_acceptor,loop,3}}]}]<br>
<br>
RES in htop ~900-1000M<br>
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</blockquote></div><br></div></div></div></div></div></div></div></div></div>