Mercurial > prosody-modules
annotate mod_measure_storage/mod_measure_storage.lua @ 4877:adc6241e5d16
mod_measure_process: Report the enforced limit
The soft limit is what the kernel actually enforces, while the hard
limit is is how far you can change the soft limit without privileges.
Unless the process dynamically adjusts the soft limit, knowing the hard
limit is not as useful as knowing the soft limit.
Reporting the soft limit and the number of in-use FDs allows placing
alerts on expressions like 'process_open_fds / process_max_fds >= 0.95'
author | Kim Alvefur <zash@zash.se> |
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date | Tue, 18 Jan 2022 18:55:20 +0100 |
parents | 04ae5b45e6c7 |
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mod_measure_storage: Experimental new module to measure storage API operations (requires 0.10)
Matthew Wild <mwild1@gmail.com>
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1 module:set_global() |
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2 |
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mod_measure_storage: Experimental new module to measure storage API operations (requires 0.10)
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3 local function return_args_after_calling(f, ...) |
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4 f(); |
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5 return ... |
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6 end |
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7 |
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mod_measure_storage: Experimental new module to measure storage API operations (requires 0.10)
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8 local function time_method(module, store_name, store_type, method_name, method_function) |
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9 local opt_use_tags = module:get_option_boolean("measure_storage_tagged_metric", false); |
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10 |
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11 local metric_name, metric_tags; |
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mod_measure_storage: Experimental new module to measure storage API operations (requires 0.10)
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12 if opt_use_tags then |
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13 metric_name, metric_tags = "storage_operation", ("store_name:%s,store_type:%s,store_operation:%s"):format(store_name, store_type, method_name); |
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14 else |
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15 metric_name = store_name.."_"..store_type.."_"..method_name; |
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16 end |
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17 local measure_operation_started = module:measure(metric_name, "times", metric_tags); |
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18 |
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19 return function (...) |
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20 module:log("debug", "Measuring storage operation %s (%s)", metric_name, metric_tags or "no tags"); |
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21 local measure_operation_complete = measure_operation_started(); |
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22 return return_args_after_calling(measure_operation_complete, method_function(...)); |
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23 end; |
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24 end |
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25 |
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26 local function wrap_store(module, store_name, store_type, store) |
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27 local new_store = setmetatable({}, { |
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28 __index = function (t, method_name) |
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29 local original_method = store[method_name]; |
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30 if type(original_method) ~= "function" then |
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31 if original_method then |
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32 rawset(t, method_name, original_method); |
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33 end |
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34 return original_method; |
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35 end |
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36 local timed_method = time_method(module, store_name, store_type, method_name, original_method); |
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Matthew Wild <mwild1@gmail.com>
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37 rawset(t, method_name, timed_method); |
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Matthew Wild <mwild1@gmail.com>
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38 return timed_method; |
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39 end; |
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40 }); |
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mod_measure_storage: Experimental new module to measure storage API operations (requires 0.10)
Matthew Wild <mwild1@gmail.com>
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41 return new_store; |
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42 end |
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43 |
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44 local function hook_event(module) |
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45 module:hook("store-opened", function(event) |
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46 event.store = wrap_store(module, event.store_name, event.store_type or "keyval", event.store); |
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47 end); |
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48 end |
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49 |
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50 function module.load() |
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51 hook_event(module); |
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52 end |
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53 |
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54 function module.add_host(module) |
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55 hook_event(module); |
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56 end |