mkevac / debugcharts

Very simple charts with some debug data for Go programs

debugcharts

Go memory debug charts.

This package uses Plotly chart library. It is open source and free for use.

Installation

go get -v -u github.com/mkevac/debugcharts

Usage

Just install package and start http server. There is an example program here.

Then go to http://localhost:8080/debug/charts. You should see something like this:

Data is updated every second. We keep data for last day.

User https://github.com/dgryski/ proposed interesing way for turning debugcharts on/off for your project:

You can add tagged file like this in your code

// +build debugcharts

package main

import _ "github.com/mkevac/debugcharts"

If you want to use debugcharts, then build your project with -tags debugcharts

Development

I use bindata to pack binary files into executable. Run make to rebuild.

debugcharts's Issues

calls to log.Fatal() make me nervous

Errors happen all the time at scale. I'm hesitant to deploy a service to production built with this knowing that log.Fatal() might be called and my application would exit. I think log.Println/return pair would be sufficient in most of the cases.

Alternatively have it configurable with a package-level variable.

http.ServeMux

Hi, remove init() and create func that will returned http.ServeMux server with all necessary handlers to allow developers to choose addr and port.
And hide Assert funcs
(if you have not many time let me do this)

add chart for monitoring CPU usage

add chart for monitoring CPU usage, thanks.

goroutine count is wrong

data race

=============================
WARNING: DATA RACE
Write at 0x000002c31d28 by goroutine
25:
aithub.com/mkevac/debuacharts. (*server) gatherData0
/go/pkg/mod/github.com/mkevac/[email protected]/debugcharts.go:125+0x472
github.com/mkevac/debugcharts.init.o•dwrap•1()
/go/pkg/mod/github.com/mkevac/[email protected]/debugcharts.go:193+0x39
Previous read at 0x000002c31d28 by goroutine 962:
[failed to restore the stack]
Goroutine 25 (running) created at:
github.com/mkevac/debugcharts.init.0(
/go/pkg/mod/github.com/mkevac/[email protected]/debugcharts.go:193+0x507

date/time is wrong with the chart

hi,
very useful chart package. However, the chart is show date/time starting Jan 17, 9:52am. Have not investigated why.

thanks,
eddie

Why does the heap keep growing

Why does the heap keep growing

Memory is not leaking and it keeps growing

Migrate to a fully open-source javascript charting library.

Highcharts is a great product, but the licensing terms aren't. Please switch to a library like flot that has less restrictive license terms.

it would be better to bind plotly in the offline cases

since you've download static js script. I think it would be better to add plotly to bindata.

run error

panic: runtime error: invalid memory address or nil pointer dereference
[signal 0xc0000005 code=0x0 addr=0x0 pc=0x7ad1a0]

goroutine 19 [running]:
github.com/mkevac/debugcharts.(*server).gatherData(0xa9bc60)
        C:/golang/gowork/src/github.com/mkevac/debugcharts/debugcharts.go:112 +0x210
created by github.com/mkevac/debugcharts.init.1
        C:/golang/gowork/src/github.com/mkevac/debugcharts/debugcharts.go:158 +0x2f9
exit status 2

no charts, errors in console

when accessing charts i see only one empty chart and a bunch of errors in console:

Uncaught TypeError: Cannot read property 'length' of null
    at new m (plotly-latest.min.js:7)
    at m (plotly-latest.min.js:7)
    at Object.plot (plotly-latest.min.js:7)
    at d (plotly-latest.min.js:7)
    at Object.r.plot (plotly-latest.min.js:7)
    at r.drawData (plotly-latest.min.js:7)
    at Object.l.syncOrAsync (plotly-latest.min.js:7)
    at Object.r.plot (plotly-latest.min.js:7)
    at Object.r.newPlot (plotly-latest.min.js:7)
    at Object.success (main.js:26)
m @ plotly-latest.min.js:7
m @ plotly-latest.min.js:7
plot @ plotly-latest.min.js:7
d @ plotly-latest.min.js:7
r.plot @ plotly-latest.min.js:7
r.drawData @ plotly-latest.min.js:7
l.syncOrAsync @ plotly-latest.min.js:7
r.plot @ plotly-latest.min.js:7
r.newPlot @ plotly-latest.min.js:7
(anonymous) @ main.js:26
j @ jquery-2.1.4.min.js:2
fireWith @ jquery-2.1.4.min.js:2
x @ jquery-2.1.4.min.js:4
(anonymous) @ jquery-2.1.4.min.js:4
load (async)
send @ jquery-2.1.4.min.js:4
ajax @ jquery-2.1.4.min.js:4
n.(anonymous function) @ jquery-2.1.4.min.js:4
getJSON @ jquery-2.1.4.min.js:4
(anonymous) @ main.js:17
j @ jquery-2.1.4.min.js:2
fireWith @ jquery-2.1.4.min.js:2
ready @ jquery-2.1.4.min.js:2
I @ jquery-2.1.4.min.js:2
4plotly-latest.min.js:7 Uncaught Error: gd.data must be an array
    at plotly-latest.min.js:7
    at I (plotly-latest.min.js:7)
    at Object.t [as extendTraces] (plotly-latest.min.js:7)
    at WebSocket.ws.onmessage (main.js:117)

may be chart lib was updated?

set default log Flag?

when use this
found default log Prefix not exists, like

log.Println("xxxx")

2017/09/04 13:25:10 xxxx
2017/09/04 13:25:10 xxxx

to

xxxx
xxxx

add expvars support

That will be great.

Or how to add expvar to this?
Can you read expvar automatically via enumerate exporing variables or smth like this?