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diff --git a/archives/extend/2013-April/000124.html b/archives/extend/2013-April/000124.html new file mode 100644 index 00000000..08b363e5 --- /dev/null +++ b/archives/extend/2013-April/000124.html @@ -0,0 +1,122 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> +<HTML> + <HEAD> + <TITLE> [99s-extend] cowboy how to ruduce the memory usage per long-hold connection + </TITLE> + <LINK REL="Index" HREF="index.html" > + <LINK REL="made" HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20cowboy%20how%20to%20ruduce%20the%20memory%20usage%20per%20long-hold%0A%09connection&In-Reply-To=%3CCAN_mQBobPN0zdpqJ3WtGKJaRMNiutvurgJfncMCqM3qtUHTm1g%40mail.gmail.com%3E"> + <META NAME="robots" CONTENT="index,nofollow"> + <style type="text/css"> + pre { + white-space: pre-wrap; /* css-2.1, curent FF, Opera, Safari */ + } + </style> + <META http-equiv="Content-Type" content="text/html; charset=us-ascii"> + <LINK REL="Previous" HREF="000123.html"> + <LINK REL="Next" HREF="000125.html"> + </HEAD> + <BODY BGCOLOR="#ffffff"> + <H1>[99s-extend] cowboy how to ruduce the memory usage per long-hold connection</H1> + <B>yongboy</B> + <A HREF="mailto:extend%40lists.ninenines.eu?Subject=Re%3A%20%5B99s-extend%5D%20cowboy%20how%20to%20ruduce%20the%20memory%20usage%20per%20long-hold%0A%09connection&In-Reply-To=%3CCAN_mQBobPN0zdpqJ3WtGKJaRMNiutvurgJfncMCqM3qtUHTm1g%40mail.gmail.com%3E" + TITLE="[99s-extend] cowboy how to ruduce the memory usage per long-hold connection">yongboy at gmail.com + </A><BR> + <I>Fri Apr 26 08:11:56 CEST 2013</I> + <P><UL> + <LI>Previous message: <A HREF="000123.html">[99s-extend] does cowboy support hot code reload/replace ? +</A></li> + <LI>Next message: <A HREF="000125.html">[99s-extend] cowboy how to ruduce the memory usage per long-hold connection +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#124">[ date ]</a> + <a href="thread.html#124">[ thread ]</a> + <a href="subject.html#124">[ subject ]</a> + <a href="author.html#124">[ author ]</a> + </LI> + </UL> + <HR> +<!--beginarticle--> +<PRE>I have tested one long-hold webapp, when 512000 user connected, the app +used +6801M memory, 6801M*1024K / 512000 = 13.6K/Connection. + +Does anyone give me some advice on how to reduce the memory usage per one +connection, thanks very much ! + +Here is the code snippet: + +start(_Type, _Args) -> + Dispatch = cowboy_router:compile([ + {'_', [{'_', htmlfile_handler, []}]} + ]), + cowboy:start_http(my_http_listener, 100, + [{port, 8000}, {max_connections, infinity}], + [{env, [{dispatch, Dispatch}]}] + ), + count_server:start(), + htmlfilesimple_sup:start_link(). + +...... + +-module(htmlfile_handler). +-behaviour(cowboy_loop_handler). +-export([init/3, info/3, terminate/3]). +-define(HEARBEAT_TIMEOUT, 20*1000). +-record(status, {count=0}). + +init(_Any, Req, State) -> + NowCount = count_server:welcome(), + io:format("online user ~p :))~n", [NowCount]), + + output_first(Req), + Req2 = cowboy_req:compact(Req), + {loop, Req2, State, hibernate}. + +%% POST/Short Request +info(_Any, Req, State) -> + {loop, Req, State, hibernate}. + +output_first(Req) -> + {ok, Reply} = cowboy_req:chunked_reply(200, [{<<"Content-Type">>, +<<"text/html; charset=utf-8">>}, + +{<<"Connection">>, <<"keep-alive">>}], Req), + cowboy_req:chunk(<<"<html><body><script>var _ = function (msg) { +parent.s._(msg, document); +};</script> +">>, + Reply), + cowboy_req:chunk(gen_output("1::"), Reply). + +gen_output(String) -> + DescList = io_lib:format("<script>_('~s');</script>", [String]), + list_to_binary(DescList). + +terminate(Reason, _Req, _State) -> + NowCount = count_server:bye(), + io:format("offline user ~p :(( ~n", [NowCount]). +-------------- next part -------------- +An HTML attachment was scrubbed... +URL: <<A HREF="http://lists.ninenines.eu/archives/extend/attachments/20130426/9d234e27/attachment.html">http://lists.ninenines.eu/archives/extend/attachments/20130426/9d234e27/attachment.html</A>> +</PRE> + +<!--endarticle--> + <HR> + <P><UL> + <!--threads--> + <LI>Previous message: <A HREF="000123.html">[99s-extend] does cowboy support hot code reload/replace ? +</A></li> + <LI>Next message: <A HREF="000125.html">[99s-extend] cowboy how to ruduce the memory usage per long-hold connection +</A></li> + <LI> <B>Messages sorted by:</B> + <a href="date.html#124">[ date ]</a> + <a href="thread.html#124">[ thread ]</a> + <a href="subject.html#124">[ subject ]</a> + <a href="author.html#124">[ author ]</a> + </LI> + </UL> + +<hr> +<a href="https://lists.ninenines.eu/listinfo/extend">More information about the Extend +mailing list</a><br> +</body></html> |