[erlang-questions] Memory consumption in ssl application (OTP-18.3.1)
vicbaz@REDACTED
vicbaz@REDACTED
Thu Apr 28 12:36:44 CEST 2016
Hello,
Could you please clarify one moment. Is the ssl session cache used only
when reuse_sessions is set to true? Is there a way to turn off the cache
completely? I'm trying to figure out what settings are needed for
thousands of short-lived connections.
28/04/16 12:21, Ingela Andin пишет:
> Hi!
>
>
> 2016-04-27 15:44 GMT+02:00 <vicbaz@REDACTED <mailto:vicbaz@REDACTED>>:
>
> 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.
>
> I see, we will looking into mitigating this effect.
>
> Regards Ingela Erlang/OTP team - Ericsson AB
>
>
>
> 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 <vicbaz@REDACTED
> <mailto:vicbaz@REDACTED> <mailto:vicbaz@REDACTED
> <mailto:vicbaz@REDACTED>>>:
>
>
> 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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