Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Measuring everything in Real-Time
Search
Bastian Hofmann
August 25, 2012
Programming
4
840
Measuring everything in Real-Time
Talk from Froscon
Bastian Hofmann
August 25, 2012
Tweet
Share
More Decks by Bastian Hofmann
See All by Bastian Hofmann
Monitoring in Kubernetes with Prometheus and Grafana
bastianhofmann
0
320
Creating a fast Kubernetes Development Workflow
bastianhofmann
0
110
Highly available cross-region deployments with Kubernetes
bastianhofmann
1
140
From source to Kubernetes in 30 minutes
bastianhofmann
0
150
Introduction to Kubernetes
bastianhofmann
1
140
CI/CD with Kubernetes
bastianhofmann
0
180
Creating a fast Kubernetes Development Workflow
bastianhofmann
1
250
Deploying your first Micro-Service application to Kubernetes
bastianhofmann
2
180
Creating a fast Kubernetes Development Workflow
bastianhofmann
0
220
Other Decks in Programming
See All in Programming
バイブコーディングの正体——AIエージェントはソフトウェア開発を変えるか?
stakaya
5
580
顧客の画像データをテラバイト単位で配信する 画像サーバを WebP にした際に起こった課題と その対応策 ~継続的な取り組みを添えて~
takutakahashi
4
1.4k
Quality Gates in the Age of Agentic Coding
helmedeiros
PRO
1
120
Bedrock AgentCore ObservabilityによるAIエージェントの運用
licux
8
530
コーディングエージェント概観(2025/07)
itsuki_t88
1
470
CEDEC 2025 『ゲームにおけるリアルタイム通信への QUIC導入事例の紹介』
segadevtech
1
570
型で語るカタ
irof
2
910
PHPカンファレンス関西2025 基調講演
sugimotokei
6
1.1k
あまり知られていない MCP 仕様たち / MCP specifications that aren’t widely known
ktr_0731
0
150
新しいモバイルアプリ勉強会(仮)について
uetyo
1
240
Vibe Codingの幻想を超えて-生成AIを現場で使えるようにするまでの泥臭い話.ai
fumiyakume
21
9.8k
202507_ADKで始めるエージェント開発の基本 〜デモを通じて紹介〜(奥田りさ)The Basics of Agent Development with ADK — A Demo-Focused Introduction
risatube
PRO
6
1.3k
Featured
See All Featured
Six Lessons from altMBA
skipperchong
28
3.9k
Product Roadmaps are Hard
iamctodd
PRO
54
11k
The Myth of the Modular Monolith - Day 2 Keynote - Rails World 2024
eileencodes
26
3k
Done Done
chrislema
185
16k
Into the Great Unknown - MozCon
thekraken
40
1.9k
Refactoring Trust on Your Teams (GOTO; Chicago 2020)
rmw
34
3.1k
The Cost Of JavaScript in 2023
addyosmani
51
8.7k
Code Reviewing Like a Champion
maltzj
524
40k
Practical Tips for Bootstrapping Information Extraction Pipelines
honnibal
PRO
21
1.4k
GraphQLとの向き合い方2022年版
quramy
49
14k
Speed Design
sergeychernyshev
32
1k
The Power of CSS Pseudo Elements
geoffreycrofte
77
5.9k
Transcript
Measuring everything in Real-Time @BastianHofmann
Logging
Measuring
Testing
many roads
None
None
None
None
None
None
None
None
Questions? Ask!
http://speakerdeck.com/u/bastianhofmann
Logging
For when something goes wrong
server error log access log debug logs slow query log
...
Error Logs
$ tail -f error.log $ grep
ErrorLog /var/logs/apache/error.log
php.ini •error_reporting •display_errors •display_startup_errors •log_errors •error_log
callable set_exception_handler( callable $exception_handler );
callable set_error_handler( callable $error_handler [, int $error_types = E_ALL |
E_STRICT ] );
Log additional info
Error code
None
HTTP Response Codes http://www.w3.org/Protocols/rfc2616/rfc2616-sec6.html
None
Access Logs
192.168.56.1 - - [09/Jul/2012:19:18:19 +0200] "GET /rg_trunk/webroot/c/af10c/ images/template/rg_logo_default.png HTTP/ 1.1"
200 882 "http://devm/rg_trunk/webroot/ directory/publications/"
LogFormat "%h %l %u %t \"%r\" %>s %b" custom CustomLog
/var/logs/apache/access.log custom http://httpd.apache.org/docs/2.2/mod/ mod_log_config.html#logformat
http://de.php.net/apache_note string apache_note ( string $note_name [, string $note_value =
"" ] )
LogFormat "...\"%{referer}i\" \"%{user- agent}i\" %{server_ip}n ..." custom nginx?
Debug Logs
https://github.com/Seldaek/monolog/
<?php use Monolog\Logger; use Monolog\Handler\StreamHandler; // create a log channel
$log = new Logger('name'); $log->pushHandler( new StreamHandler( 'path/to/your.log', Logger::WARNING ) ); // add records to the log $log->addWarning('Foo'); $log->addError('Bar');
Handlers • Stream • Mail • FirePHP • ChromePHP •
Socket • Roating File • MongoDB • Syslog • Gelf • Null • Test • FingersCrossed
<?php use Monolog\Logger; use Monolog\Handler\StreamHandler; use Monolog\Processor\MemoryUsageProcessor; $log = new
Logger('name'); $handler = new StreamHandler( 'path/to/your.log', Logger::WARNING ); $log->pushHandler($handler); $log->pushProcessor( new MemoryUsageProcessor() );
Log in a structured way
JSON http://www.ietf.org/rfc/rfc4627.txt
<?php use Monolog\Logger; use Monolog\Handler\StreamHandler; use Monolog\Formatter\JsonFormatter; $log = new
Logger('name'); $handler = new StreamHandler( 'path/to/your.log', Logger::WARNING ); $handler->setFormatter(new JsonFormatter()); $log->pushHandler($handler);
http://getcomposer.org/ http://packagist.org/
Logs from other services
web server db memcached db http service user request log
log log log log
Correlation / Tracing ID
web server db memcached db http service create unique trace_id
for request user request trace_id trace_id trace_id trace_id log log log log log
X-Trace-Id: bbr8ehb984tbab894
None
None
None
Aggregate the logs in a central place
Make them easily full- text searchable
Make them aggregate- able
Always Log to file
Seriously...
Always Log to file
AND REMEMBER
Always Log to file
Directly to a database
webserver webserver webserver DB
Disadvantages
Database is down?
Database is slow?
Database is full?
Better solutions?
graylog2 http://graylog2.org/
Full text search
Structured Messages
Metrics & Alarms
Graylog2 UDP GELF Messages elasticsearch webserver webserver webserver
{ "version": "1.0", "host": "www1", "short_message": "Short message", "full_message": "Backtrace
here\n \nmore stuff", "timestamp": 1291899928.412, "level": 1, "facility": "payment-backend", "file": "/var/www/somefile.rb", "line": 356, "_user_id": 42, "_something_else": "foo" }
Disadvantages
Graylog/elasticsearch is down?
Graylog/elasticsearch is full?
Packet loss
Graylog2 elasticsearch webserver webserver webserver AMQP GELF GELF GELF GELF
None
Don't influence your application by logging
logstash http://logstash.net/
Graylog2 elasticsearch webserver webserver webserver AMQP log log log logstash
logstash logstash logstash GELF
Very rich plugin system
input filter output
file { type => "error" path => [ "/var/logs/php/*.log" ]
add_field => [ "severity", "error" ] } file { type => "access" path => [ "/var/logs/apache/*_access.log" ] add_field => [ "severity", "info" ] }
filter{ grok { match => ["@source", "\/%{USERNAME:facility}\.log$"] } grok {
type => "access" pattern => "^%{IP:OriginalIp} \s[a-zA-Z0-9_-]+\s[a-zA-Z0-9_-]+\s\[.*? \]\s\"%{DATA:Request}..." } }
output { amqp { host => "amqp.host" exchange_type => "fanout"
name => "logs" } }
input { amqp { host => 'amqp.host' port => '5672'
exchange => 'logs' name => 'logs' type => 'logs' exclusive => false } }
output { gelf { host => '127.0.0.1' } }
Measuring
For knowing what happens
Munin http://munin-monitoring.org/
Ganglia http://ganglia.sourceforge.net/
None
Graphite http://graphite.wikidot.com/
webserver webserver webserver graphite UDP
webserver webserver webserver graphite UDP statsd
StatsD https://github.com/etsy/statsd/
webserver webserver webserver statsd statsd statsd graphite aggregated UPD message
webserver webserver webserver statsd statsd statsd graphite aggregated UPD message
statsd
https://github.com/etsy/statsd/blob/master/examples/php- example.php StatsD::increment('key');
None
Technical Metrics
Business Metrics
Define your KPIs
Testing
For improving your app
Existing features
New features
A/B
BUY IT BUY IT $userId % 2 === 0 $userId
= 24 save that option A was clicked save that option A is shown conversion = option A clicked / option A shown
BUY IT BUY IT save random decision in session $userId
= 24 save that option A was clicked save that option A is shown conversion = option A clicked / option A shown
Save when experiment is shown
None
Save when a goal is reached
None
Conversion
Define your goals!
Disadvantages
Bad conversion during test
Only works for temporary tests
Inflexible: changing of tests not supported
There are better methods with better results
Bandit Algorithm http://untyped.com/untyping/2011/02/11/stop-ab-testing- and-make-out-like-a-bandit/
BUY IT BUY IT random decision $userId = 24 save
that option A was clicked save that option A is shown conversion = option A clicked / option A shown 1
BUY IT BUY IT 2 90% users best option rest
other options
Integrate it into your architecture
None
Be careful
https://github.com/bashofmann/ Try it out
Did you like this talk? h"p://twi"er.com/Bas2anHofmann h"p://profiles.google.com/bashofmann h"p://lanyrd.com/people/Bas2anHofmann h"p://speakerdeck.com/u/bas2anhofmann h"ps://github.com/bashofmann
[email protected]
http://programm.froscon.de/2012/ events/916.html