Software / code / prosody-modules
Changeset
3615:5fe34e5f9829
mod_log_events_by_memory: Log events where Lua memory usage increased
| author | Kim Alvefur <zash@zash.se> |
|---|---|
| date | Mon, 10 Jun 2019 14:38:06 +0200 |
| parents | 3614:f74444b0e187 |
| children | 3616:c0bc97c0ba61 |
| files | mod_log_events_by_memory/README.markdown mod_log_events_by_memory/mod_log_events_by_memory.lua |
| diffstat | 2 files changed, 29 insertions(+), 0 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_log_events_by_memory/README.markdown Mon Jun 10 14:38:06 2019 +0200 @@ -0,0 +1,8 @@ +This module compares the memory usage reported by Lua before and after +each event and reports it to the log if it exceeds the configuration +setting `log_memory_threshold` (in bytes). + +``` lua +log_memory_threshold = 20*1024 +``` +
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mod_log_events_by_memory/mod_log_events_by_memory.lua Mon Jun 10 14:38:06 2019 +0200 @@ -0,0 +1,21 @@ +module:set_global(); + +local treshold = module:get_option_number("log_memory_threshold", 20*1024); + +function event_wrapper(handlers, event_name, event_data) + local memory_before = collectgarbage("count")*1024; + local ret = handlers(event_name, event_data); + local memory_after = collectgarbage("count")*1024; + if (memory_after - memory_before) > treshold then + module:log("warn", "Memory increased by %g bytes while processing event '%s'", (memory_after - memory_before), event_name); + end + return ret; +end + +local http_events = require "net.http.server"._events; +module:wrap_object_event(http_events, false, event_wrapper); + +module:wrap_event(false, event_wrapper); +function module.add_host(module) + module:wrap_event(false, event_wrapper); +end
