Description
I tried to monitor event loop with
local function monitor(collector)
local time_before
while true do
time_before = clock.monotonic()
fiber.yield()
collector:observer(clock.monotonic() - time_before)
end
end
local function init()
local collector = require('metrics').summary('tnt_fiber_event_loop', 'event loop time',
{ [0.5] = 0.01, [0.9] = 0.01, [0.99] = 0.01, })
fiber.create(monitor, collector)
endafter half a minute I've got
{
"label_pairs":{
"alias":"tnt_router"
},
"timestamp":1612882820817429,
"metric_name":"tnt_fiber_event_loop_count",
"value":7766500
},
{
"label_pairs":{
"alias":"tnt_router"
},
"timestamp":1612882820817429,
"metric_name":"tnt_fiber_event_loop_sum",
"value":7.6474393837925
},
{
"label_pairs":{
"quantile":0.5,
"alias":"tnt_router"
},
"timestamp":1612882820821171,
"metric_name":"tnt_fiber_event_loop",
"value":8.4099883679301e-07
},
{
"label_pairs":{
"quantile":0.9,
"alias":"tnt_router"
},
"timestamp":1612882820873518,
"metric_name":"tnt_fiber_event_loop",
"value":"inf"
},
{
"label_pairs":{
"quantile":0.99,
"alias":"tnt_router"
},
"timestamp":1612882820893734,
"metric_name":"tnt_fiber_event_loop",
"value":"inf"
}Also observation count in collector wasn't equal to the one in structure
help: event loop time
observations:
'': 7997000
name: tnt_fiber_event_loop_count
label_pairs:
'': &6 []
registry: *1
objectives:
0.5: 0.01
0.9: 0.01
0.99: 0.01
sum_collector:
registry: *1
help: event loop time
observations:
'': 8.0931331436805
name: tnt_fiber_event_loop_sum
label_pairs:
'': *6
help: event loop time
observations:
'':
b: 'cdata<double [?]>: 0x4113c3e0'
compress_cnt: 500
__max_samples: 500
b_len: 0
stream:
f: 'function: 0x4113c100'
l_len: 141219
l_cap: 194581
l: 'cdata<struct 913 [?]>: 0x460de020'
n: 8008162
sorted: true
name: tnt_fiber_event_loop
label_pairs:
'': []