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annotate mod_log_events_by_cpu_usage/mod_log_events_by_cpu_usage.lua @ 4270:243f7b0dbf35

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mod_http_oauth2: Reduce authorization code validity time to 2 minutes RFC 6749 states > A maximum authorization code lifetime of 10 minutes is RECOMMENDED. So 15 minutes was way too long. I was thinking 5 minutes at first but since this should generally be instant, I settled on 2 minutes as a large guesstimate on how slow it might be on slow links.
author Kim Alvefur <zash@zash.se>
date Sun, 22 Nov 2020 18:46:25 +0100
parents c0bc97c0ba61
children
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5fe34e5f9829 mod_log_events_by_memory: Log events where Lua memory usage increased
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1 module:set_global();
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2
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c0bc97c0ba61 mod_log_events_by_cpu_usage: Log events where more than a certain amount of CPU time was spent
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3 local treshold = module:get_option_number("log_cpu_threshold", 0.01);
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4
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5 function event_wrapper(handlers, event_name, event_data)
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6 local cpu_before = os.clock();
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7 local ret = handlers(event_name, event_data);
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8 local cpu_after = os.clock();
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9 if (cpu_after - cpu_before) > treshold then
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10 module:log("warn", "%g seconds of CPU usage while processing event '%s'", (cpu_after - cpu_before), event_name);
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11 end
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12 return ret;
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13 end
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14
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15 local http_events = require "net.http.server"._events;
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16 module:wrap_object_event(http_events, false, event_wrapper);
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18 module:wrap_event(false, event_wrapper);
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19 function module.add_host(module)
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20 module:wrap_event(false, event_wrapper);
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21 end