PERFORMANCE & SCALABILITYWhere to Begin

Brandon Lyon

Performance & Scalability

Define the Objective

Performance & Scalability

Define the Objective Minimize HTTP

Requests

Performance & Scalability

Define the Objective Minimize HTTP

Requests Minimize Server

Processing

Performance & Scalability

Define the Objective Minimize HTTP

Requests Minimize Server

Processing Optimize Server

Processing

Performance & Scalability

Define the Objective Minimize HTTP

Requests Minimize Server

Processing Optimize Server

Processing Optimize the

Database

Performance & Scalability

Define the Objective Minimize HTTP

Requests Minimize Server

Processing Optimize Server

Processing Optimize the

Database

Minimizing HTTP Requests

Aggregate & Compress CSS Files

Minimizing HTTP Requests

Aggregate & Compress CSS Files

Aggregate JavaScript Files

Minimizing HTTP Requests

Aggregate & Compress CSS Files

Aggregate JavaScript Files

Image Sprites

Performance & Scalability

Define the Objective Minimize HTTP

Requests Minimize Server

Processing Optimize Server

Processing Optimize the

Database

Minimize Server Processing

Alternative PHP Cache (APC)

Memcached Varnish Cache

Alternative PHP Cache (APC)

Make sure you've allocated enough memory.apc.shm_segments=1

apc.shm_size=32

Check your script files on every request?apc.stat=0

Memory Fragmentation?apc.ttl=0

Memcached

Basic Implementation

# memcached -m 24 -p 11211 -d

$conf = array(

'memcache_servers' => array(

'localhost:11211' => 'default',

),

'memcache_bins' => array(

'cache' => 'default',

),

Memcached

Server Cluster?$conf = array(

'memcache_servers' => array(

host1:port => cluster,

hostN:port => cluster,

),

'memcache_bins' => array(

bin1 => cluster,

binN => cluster,

),

Varnish Cache

Toss your cookies!if (req.url !~ "^/blog\/.*/") {

set req.http.Cookie =

regsuball(req.http.Cookie, "comment\_.*", "");

}

Define Exceptionsif (req.url ~ "install.php|update.php") {

return(pass);

}

Performance & Scalability

Define the Objective Minimize HTTP

Requests Minimize Server

Processing Optimize Server

Processing Optimize the

Database

Optimize Server Processing

Identify the Problem

Optimize Server Processing

Identify the Problem

FIX IT

Optimize Server Processing

Identifying the Problem Areas Network Linux Apache MySQL PHP

Optimize Server Processing

Identifying the Problem Areas Network Linux Apache MySQL PHP

Optimize Server Processing

Performance Profiling Apache Benchmarking (ab) MySQL Slow Query Log & Profiling PHP Xdebug & KCachegrind

Apache Benchmarking (ab)

10 Concurrent Requests

100 Requests

7.35 Requests/Second 50% of Requests served in

under 1352ms

# ab -n 100 -c 10 http://d7.blyon.lan/

Apache Benchmarking (ab)

Compress Cached Pages Aggregate and Compress CSS files Aggregate JavaScript files

Apache Benchmarking (ab)

10 Concurrent Requests

100 Requests

46.32 Requests/Second 50% of Requests served in

under 213ms

# ab -n 100 -c 10 http://d7.blyon.lan/

Apache Benchmarking (ab)

Install APC Install APC Drupal Module

Apache Benchmarking (ab)

10 Concurrent Requests

100 Requests

648.77 Requests/Second 50% of Requests served in

under 12ms

# ab -n 100 -c 10 http://d7.blyon.lan/

Optimize Server Processing

Performance Profiling Apache Benchmarking (ab) MySQL Slow Query Log & Profiling PHP Xdebug & KCachegrind

MySQL Slow Query Log

/etc/mysql/my.cnflog_slow_queries = /var/log/mysql/mysql-slow.log

long_query_time = 1

# tail -f /var/log/mysql/mysql-slow.log# User@Host: root[root] @ localhost []

# Query_time: 0.000427 Lock_time: 0.000037 Rows_sent: 50

Rows_examined: 50

SET timestamp=1294541182;

select * from node;

Optimize Server Processing

Performance Profiling Apache Benchmarking (ab) MySQL Slow Query Log & Profiling PHP Xdebug & KCachegrind

PHP Xdebug & KCachegrind

Xdebug Features Stack Traces & Function Traces in Error

Messages Memory Allocation Infinite Recursion Protection PHP Profiling Code Coverage Analysis Interactive Debugging support

PHP Xdebug & KCachegrind

Xdebug Configuration zend_extension="/usr/local/php/modules/xdebug.so"

xdebug.profiler_enable_trigger = 1

Xdebug Usage Append ”?XDEBUG_PROFILE=1” to URL

View cachegrind compatible profile log

/tmp/cachegrind.out.10362

PHP Xdebug & KCachegrind

Kcachegrind Profile data Visualization tool Accepts ”Callgrind Profile” formatted data Requires KDE Libraries

PHP Xdebug & KCachegrind

Now FIX IT

Performance & Scalability

Define the Objective Minimize HTTP

Requests Minimize Server

Processing Optimize Server

Processing Optimize the

Database

Optimizing the Database

http://day32.com/MySQL/tuning-primer.sh Analyzes current my.cnf Analyzes resource usage Analyzes Caching Analyzes Tables and Queries Generates recommended my.cnf

PERFORMANCE & SCALABILITYWhere to Begin

Brandon Lyon