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Send chrome memory usage stats to librato
// 1. Go to chrome://memory-redirect/
// 2. Paste this script into the developer console
(function(){
var SERVER = 'http://localhost:4567/', // Post metrics to any server
STRINGS = 'chrome://memory-redirect/strings.js',
INTERVAL = 10e3,
RE_INCLUDE = /./; // only include certain results, if you want.
function getMemoryStats() {
console.log('Getting stats.')
xhr({ method: 'GET', url: STRINGS, callback: sendMemoryStats })
}
function sendMemoryStats(req){
eval(req.responseText.replace(/loadTimeData./, ''))
xhr({ method: 'POST', url: SERVER, data: formatData(data) })
}
function xhr(opts){
var req, type, url, callback;
method = opts.method;
url = opts.url;
callback = opts.callback || function(){};
data = opts.data;
req = new XMLHttpRequest()
req.open(method, url, true)
req.onreadystatechange = function(){
if (req.readyState === 4 && req.status === 200) {
callback(req)
}
}
req.send(data)
}
function formatData(data){
return JSON.stringify({
browsers: data.jstemplateData.browsers.map(function(browser){
memory = getMemory(browser);
memory.source = formatSource(browser.name);
return memory;
}),
processes: data.jstemplateData.child_data
.map(function(item){
memory = getMemory(item);
memory.source = formatSource(item.child_name, item.titles.slice(-1)[0]);
return memory;
})
.filter(function(item){
return RE_INCLUDE.test(item.source)
})
});
}
function getMemory(measurement) {
return {
virtual: measurement.comm_priv * 1000,
private: measurement.ws_priv * 1000
};
}
function formatSource() {
var args = [].slice.call(arguments);
return args.join(" ")
.toLowerCase()
.replace(/[^a-z\- ]/g, ' ')
.replace(/ [ ]*/g, ' ')
.replace(/ /g, '.')
.replace(/\.$/g, '')
}
console.info('Start collecting memory stats...')
getMemoryStats()
setInterval(getMemoryStats, INTERVAL)
})()
require 'sinatra'
require 'json'
require 'librato/metrics'
Librato::Metrics.authenticate ENV['email'], ENV['token']
post '/' do
queue = Librato::Metrics::Queue.new
headers \
"Access-Control-Allow-Credentials" => "true",
"Access-Control-Allow-Headers" => "*",
"Access-Control-Allow-Methods" => "*",
"Access-Control-Allow-Origin" => "*"
req = JSON.parse(request.body.read)
req['processes'].each do |item|
queue.add 'chrome.process.memory.private' => {
value: item['private'],
source: item['source']
}
queue.add 'chrome.process.memory.virtual' => {
value: item['virtual'],
source: item['source']
}
end
req['browsers'].each do |item|
queue.add 'chrome.memory.private' => {
value: item['private'],
source: item['source']
}
queue.add 'chrome.memory.virtual' => {
value: item['virtual'],
source: item['source']
}
end
queue.submit
end
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