File

mod_measure_malloc/mod_measure_malloc.lua @ 5551:8bfcedd93a72

mod_rest: List all error conditions in OpenAPI spec These are not handled by datamanager but by util.stanza and util.error, so they are not represented in the JSON schema file.
author Kim Alvefur <zash@zash.se>
date Sat, 17 Jun 2023 16:26:33 +0200
parent 4758:b9af1ccac98b
line wrap: on
line source

module:set_global();

local metric = require"core.statsmanager".metric;
local pposix = require"util.pposix";

local allocated = metric(
	"gauge", "malloc_heap_allocated", "bytes",
	"Allocated bytes by mode of allocation",
	{"mode"}
);

local used = metric(
	"gauge", "malloc_heap_used", "bytes",
	"Used bytes"
):with_labels();

local unused = metric(
	"gauge", "malloc_heap_unused", "bytes",
	"Unused bytes"
):with_labels();

local returnable = metric(
	"gauge", "malloc_heap_returnable", "bytes",
	"Returnable bytes"
):with_labels();

module:hook("stats-update", function ()
	local meminfo = pposix.meminfo();
	if meminfo.allocated then
		allocated:with_labels("sbrk"):set(meminfo.allocated);
	end
	if meminfo.allocated_mmap then
		allocated:with_labels("mmap"):set(meminfo.allocated_mmap);
	end
	if meminfo.used then
		used:set(meminfo.used);
	end
	if meminfo.unused then
		unused:set(meminfo.unused);
	end
	if meminfo.returnable then
		returnable:set(meminfo.returnable);
	end
end);