Screaming Fast Wpmu

Jan 24, 20105 likes6,157 views

This document discusses optimizing a WordPress installation for performance. It recommends using Nginx as a reverse proxy cache in front of Apache and PHP to cache both logged-in and logged-out content. It achieved near elimination of problems, doubled network throughput, halved memory usage, and allowed disabling of plugins by caching everything. Results included atom feeds increasing in speed from 6 requests/second to over 7000 requests/second.

Screaming Fast Wordpress

Dan Collis-Puro
Berkman Center for Internet & Society
http://blogs.law.harvard.edu/djcp
djcp@cyber.law.harvard.edu

Me

●Dev/sysadmin for 12 years
●Pro linux admin 9 years

●Perl / mod_perl / postgres / mysql / ruby / rails /

php
●Mostly scrappy non-profits

●Geek-of-all-trades at Berkman (

http://cyber.law.harvard.edu)
●http://blogs.law.harvard.edu/

●Help manage many servers and

apps

Goals

●Use minimum resources to fulfill requests
●Survive the slashdot/digg effect

●Unobtrusive

●Easy to tune

●Optimize for different platforms / audiences

●If you hit the app server, you've failed

●If you MUST hit the app server, do

what's reasonable to minimize
resources

MLAPW

●MySQL
●Linux

●Apache

●PHP

●Wordpress

MySQL

●Optimize tables (with mysqlcheck and a cron job)
●Bump up query cache

●Tune key buffers

●mysqltuner.pl / tuning-primer.sh

●Might want more indexes, depending

●mytop

●Slow query log

●(meh) Clean out options table

●(meh) Clean out revisions / old spam

●(plugin) debug-queries

Linux

●RAM
●Never use swap

●Fast disk, database on its own spindles

●Fast network

●stat() kills you on network filesystems

Apache

●Use a reverse proxy
●Keepalive on frontend, no keepalive on backend

●Enable mod_deflate

●Set a sane MaxClients setting

●Use a lighter-weight frontend server – nginx!

●Use frontend proxy caching

●apachetop

PHP

●Enable opcode cache
●Make sure you allocate enough

shared RAM
●Consider not allowing stat()s

Wordpress

●Two major audiences: logged in and not.
●WP-SuperCache, W3 Total Cache

●Memcached is not a panacea.

●Nor is the WP object cache.

●Disable unused plugins

●CDN for media delivery

Our Problem

●750+ live blogs, some heavily trafficked and quite
large
●Not too many simulateously auth'd users

●MANY spiders. Freakin' spiders!

●Mini-DDOSs each week

●ENORMOUS corpus of URLs to cache

●RSS feeds don't use feedburner

Our Solution

●nginx as a caching front-end proxy
●No plugins

●4 lines of code to the wordpress core

●Very flexible caching rules

●Able to cache for both audiences (sorta)

●Able to cache EVERYTHING. Period.

●Handles gzipping and logging

●Able to kill bad 'bots

Results

●Almost NO problems since implementation
●Atom feed from 6/sec to 2500/sec (network test)

●Atom feed from 3.95/sec to ~7000/sec (local test)

(apache 3500 / sec)
●DOUBLED network throughput (?)

●Halved memory requirements

●Able to rip out all wordpress-level

customizations and plugins.
Except one.

Random Tools

●ab + bash
●firebug

●yslow

●Siege

●htop

●apachetop

●mysqltop

●EXPLAIN select

Photo credits:
Characters:
http://www.flickr.com/photos/goopymart

Background:
http://www.flickr.com/photos/roll_initiative

I ♣ you! Get in touch:
http://blogs.law.harvard.edu/djcp
djcp on the twitterz
djcp@cyber.law.harvard.edu
dan@collispuro.com
http://delicious.com/djcp - more specifically:
http://delicious.com/djcp/screamingfastwp

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Special Meetup Edition - TDX Bengaluru Meetup #52.pptxshyamraj55

Dev Dives: Automate and orchestrate your processes with UiPath MaestroUiPathCommunity

This session is designed to equip developers with the skills needed to build mission-critical, end-to-end processes that seamlessly orchestrate agents, people, and robots. 📕 Here's what you can expect: - Modeling: Build end-to-end processes using BPMN. - Implementing: Integrate agentic tasks, RPA, APIs, and advanced decisioning into processes. - Operating: Control process instances with rewind, replay, pause, and stop functions. - Monitoring: Use dashboards and embedded analytics for real-time insights into process instances. This webinar is a must-attend for developers looking to enhance their agentic automation skills and orchestrate robust, mission-critical processes. 👨‍🏫 Speaker: Andrei Vintila, Principal Product Manager @UiPath This session streamed live on April 29, 2025, 16:00 CET. Check out all our upcoming Dev Dives sessions at https://community.uipath.com/dev-dives-automation-developer-2025/.

Drupalcamp Finland – Measuring Front-end Energy ConsumptionExove

Noah Loul Shares 5 Steps to Implement AI Agents for Maximum Business Efficien...Noah Loul

Artificial intelligence is changing how businesses operate. Companies are using AI agents to automate tasks, reduce time spent on repetitive work, and focus more on high-value activities. Noah Loul, an AI strategist and entrepreneur, has helped dozens of companies streamline their operations using smart automation. He believes AI agents aren't just tools—they're workers that take on repeatable tasks so your human team can focus on what matters. If you want to reduce time waste and increase output, AI agents are the next move.

Increasing Retail Store Efficiency How can Planograms Save Time and Money.pptxAnoop Ashok

Cybersecurity Identity and Access Solutions using Azure ADVICTOR MAESTRE RAMIREZ

#StandardsGoals for 2025: Standards & certification roundup - Tech Forum 2025BookNet Canada

Book industry standards are evolving rapidly. In the first part of this session, we’ll share an overview of key developments from 2024 and the early months of 2025. Then, BookNet’s resident standards expert, Tom Richardson, and CEO, Lauren Stewart, have a forward-looking conversation about what’s next. Link to recording, transcript, and accompanying resource: https://bnctechforum.ca/sessions/standardsgoals-for-2025-standards-certification-roundup/ Presented by BookNet Canada on May 6, 2025 with support from the Department of Canadian Heritage.

Role of Data Annotation Services in AI-Powered ManufacturingAndrew Leo

Rusty Waters: Elevating Lakehouses Beyond Sparkcarlyakerly1

Spark is a powerhouse for large datasets, but when it comes to smaller data workloads, its overhead can sometimes slow things down. What if you could achieve high performance and efficiency without the need for Spark? At S&P Global Commodity Insights, having a complete view of global energy and commodities markets enables customers to make data-driven decisions with confidence and create long-term, sustainable value. 🌍 Explore delta-rs + CDC and how these open-source innovations power lightweight, high-performance data applications beyond Spark! 🚀

Enhancing ICU Intelligence: How Our Functional Testing Enabled a Healthcare I...Impelsys Inc.

Big Data Analytics Quick Research Guide by Arthur MorganArthur Morgan

This is a Quick Research Guide (QRG). QRGs include the following: - A brief, high-level overview of the QRG topic. - A milestone timeline for the QRG topic. - Links to various free online resource materials to provide a deeper dive into the QRG topic. - Conclusion and a recommendation for at least two books available in the SJPL system on the QRG topic. QRGs planned for the series: - Artificial Intelligence QRG - Quantum Computing QRG - Big Data Analytics QRG - Spacecraft Guidance, Navigation & Control QRG (coming 2026) - UK Home Computing & The Birth of ARM QRG (coming 2027) Any questions or comments? - Please contact Arthur Morgan at [email protected]. 100% human made.

What is Model Context Protocol(MCP) - The new technology for communication bw...Vishnu Singh Chundawat

The MCP (Model Context Protocol) is a framework designed to manage context and interaction within complex systems. This SlideShare presentation will provide a detailed overview of the MCP Model, its applications, and how it plays a crucial role in improving communication and decision-making in distributed systems. We will explore the key concepts behind the protocol, including the importance of context, data management, and how this model enhances system adaptability and responsiveness. Ideal for software developers, system architects, and IT professionals, this presentation will offer valuable insights into how the MCP Model can streamline workflows, improve efficiency, and create more intuitive systems for a wide range of use cases.