[erlang-questions] Memory consumption in ssl application (OTP-18.3.1)

vicbaz <>
Wed Apr 27 15:44:15 CEST 2016


Hello,

The reason was session_cache_server_max (defaults to 1000).
The ssl_manager quickly get filled by

{'$gen_cast',{invalidate_session,8443,{session,<<...>>,...}}}
{delayed_clean_session,{8443,<<14,50,229,...>>},40986}

messages.

27/04/16 13:29, Ingela Andin пишет:
> Hi!
>
> You could try using the  observer application to find out more
> information about your system state.
> There is no apparent reason why ssl-7.3 should consume a lot more memory
> than ssl-6.0.1.2.
> But a lot has append between the versions and heavy load may find corner
> cases that where missed.
>
> Regards Ingela Erlang/OTP Team - Ericsson AB
>
>
> 2016-04-25 14:35 GMT+02:00 < <mailto:>>:
>
>     Hello,
>
>     When I run
>     https://github.com/ninenines/cowboy/tree/1.0.4/examples/ssl_hello_world
>     under load (using https://github.com/JoeDog/siege) I found a big
>     difference in memory consumption between OTP-17.5 and OTP-18.3. I know
>     the ssl application has many changes in new versions. Is this memory
>     usage normal now or can be reduced using some ssl application settings?
>
>     I use OTP-17.5.6.9 and OTP-18.3.1.
>
>     ================================================================================
>     Erlang/OTP 17 [erts-6.4.1.6] [source] [64-bit] [smp:2:2]
>     [async-threads:10] [hipe] [kernel-poll:false]
>
>     1> application:which_applications().
>     [{ssl_hello_world,"Cowboy Hello World example with SSL.",
>                        "1"},
>       {cowboy,"Small, fast, modular HTTP server.","1.0.4"},
>       {ranch,"Socket acceptor pool for TCP protocols.","1.2.1"},
>       {cowlib,"Support library for manipulating Web protocols.",
>               "1.0.2"},
>       {ssl,"Erlang/OTP SSL application","6.0.1.2"},
>       {public_key,"Public key infrastructure","0.23"},
>       {crypto,"CRYPTO","3.5"},
>       {asn1,"The Erlang ASN1 compiler version 3.0.4","3.0.4"},
>       {stdlib,"ERTS  CXC 138 10","2.4"},
>       {kernel,"ERTS  CXC 138 10","3.2.0.1"}]
>
>     2> erlang:memory().
>     [{total,43913840},
>       {processes,8036312},
>       {processes_used,8030744},
>       {system,35877528},
>       {atom,470537},
>       {atom_used,455904},
>       {binary,1498800},
>       {code,11074476},
>       {ets,14516424}]
>
>     3> recon_alloc:memory(used).
>     45519464
>
>     4> recon_alloc:memory(usage).
>     0.7212344918526264
>
>     5> recon:proc_window(memory, 10, 500).
>     [{<0.25910.2>,68120,
>        [{current_function,{gen_fsm,loop,7}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.25908.2>,68120,
>        [{current_function,{gen_fsm,loop,7}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.284.0>,15808,
>        [ssl_manager,
>         {current_function,{gen_server,loop,6}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.285.0>,12712,
>        [tls_connection_sup,
>         {current_function,{gen_server,loop,6}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.25909.2>,5888,
>        [{current_function,{gen,do_call,4}},
>         {initial_call,{cowboy_protocol,init,4}}]},
>       {<0.324.0>,4888,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.302.0>,4808,
>        [{current_function,{ranch_conns_sup,loop,4}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.330.0>,3016,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.25911.2>,2848,
>        [{current_function,{gen,do_call,4}},
>         {initial_call,{cowboy_protocol,init,4}}]},
>       {<0.340.0>,1872,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]}]
>
>     6> recon:proc_window(reductions, 10, 500).
>     [{<0.2634.3>,11161,
>        [{current_function,{gen_fsm,loop,7}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.2633.3>,9747,
>        [{current_function,{crypto,int_to_bin_pos,2}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.284.0>,4097,
>        [ssl_manager,
>         {current_function,{gen_server,loop,6}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.285.0>,3314,
>        [tls_connection_sup,
>         {current_function,{gen_server,loop,6}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.302.0>,1003,
>        [{current_function,{ranch_conns_sup,loop,4}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.378.0>,426,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.372.0>,425,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.379.0>,425,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.377.0>,425,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.343.0>,425,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]}]
>
>     RES in htop ~50-60M
>
>     ================================================================================
>
>     Erlang/OTP 18 [erts-7.3.1] [source] [64-bit] [smp:2:2]
>     [async-threads:10] [hipe] [kernel-poll:false]
>
>     1> application:which_applications().
>     [{ssl_hello_world,"Cowboy Hello World example with SSL.",
>                        "1"},
>       {cowboy,"Small, fast, modular HTTP server.","1.0.4"},
>       {ranch,"Socket acceptor pool for TCP protocols.","1.2.1"},
>       {cowlib,"Support library for manipulating Web protocols.",
>               "1.0.2"},
>       {ssl,"Erlang/OTP SSL application","7.3"},
>       {public_key,"Public key infrastructure","1.1.1"},
>       {crypto,"CRYPTO","3.6.3"},
>       {asn1,"The Erlang ASN1 compiler version 4.0.2","4.0.2"},
>       {recon,"Diagnostic tools for production use","2.3.1"},
>       {stdlib,"ERTS  CXC 138 10","2.8"},
>       {kernel,"ERTS  CXC 138 10","4.2"}]
>
>     2> erlang:memory().
>     [{total,949153560},
>       {processes,902969888},
>       {processes_used,902558312},
>       {system,46183672},
>       {atom,437761},
>       {atom_used,432875},
>       {binary,48320},
>       {code,11407283},
>       {ets,883640}]
>
>     3> recon_alloc:memory(used).
>     863194560
>
>     4> recon_alloc:memory(usage).
>     0.8005009562139471
>
>     5> recon:proc_window(memory, 10, 500).
>     [{<0.290.0>,94360,
>        [ssl_manager,
>         {current_function,{ssl_manager,handle_cast,2}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.13589.3>,24640,
>        [{current_function,{ssl_manager,validate_session,3}},
>         {initial_call,{ssl_manager,init_session_validator,1}}]},
>       {<0.291.0>,12832,
>        [tls_connection_sup,
>         {current_function,{gen_server,loop,6}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.13590.3>,10960,
>        [{current_function,{gen,do_call,4}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.318.0>,7904,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.308.0>,3056,
>        [{current_function,{ranch_conns_sup,loop,4}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.385.0>,1872,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.254.0>,0,
>        [code_server,
>         {current_function,{code_server,loop,1}},
>         {initial_call,{erlang,apply,2}}]},
>       {<0.325.0>,0,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.357.0>,0,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]}]
>
>     6> recon:proc_window(reductions, 10, 500).
>     [{<0.290.0>,232358,
>        [ssl_manager,
>         {current_function,{gen_server,loop,6}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.291.0>,3058,
>        [tls_connection_sup,
>         {current_function,{gen_server,loop,6}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.308.0>,1129,
>        [{current_function,{ranch_conns_sup,loop,4}},
>         {initial_call,{proc_lib,init_p,5}}]},
>       {<0.339.0>,435,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.340.0>,430,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.355.0>,430,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.353.0>,430,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.334.0>,430,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.366.0>,430,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]},
>       {<0.360.0>,430,
>        [{current_function,{prim_inet,accept0,2}},
>         {initial_call,{ranch_acceptor,loop,3}}]}]
>
>     RES in htop ~900-1000M
>     _______________________________________________
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