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Issues related to computer hardware and Moodle's performance under load.

Documentation: Performance and Performance FAQ
Forum moderator: Howard Miller

Read this first!

This forum is for discussing issues related to computer hardware for Moodle, as well as comparing notes on Moodle's performance under load. Advice on finding an internet hosting service also belongs here.

Before posting your question here please read the documentation Performance and and Performance FAQ.

Many of the questions have already been answered. Please make use of the Advanced forum search and the Google custom search to find them.

If your questions still remain unanswered, post them here. Include as much background information as possible about your hardware - operating system, web server, database server, PHP scripting framework, etc. If your machine is virtualized, also mention the host hardware, operating system, virtualization technology used and resources assigned to the virtual machine. If you use a hosting service, mention either the hosting provider and the package or resources as advertised.

For general advice on how to ask questions, refer to the Moodle.org forums help. Also please observe our site policy.

Best wishes,
your moderator Howard.

List of discussions. Showing 100 of 3217 discussions
Status	Discussion	Started by	Last post	Replies	Actions
	System Locking up with more than a dozen users Locked	Mark Hardwick 26 Sept 2013	Mark Hardwick 10 Oct 2013	17
	Poor performance on Windows virtual server Locked	Scott Christy 1 Aug 2013	AL Rachels 6 Sept 2013	17
	Moodle very slow or not responding Locked	Hansruedi (Lori) Lorenz 22 June 2013	Rick Jerz 29 June 2013	17
	PHP-accelerators for the Windows platform Locked	Luis de Vasconcelos 12 Mar 2011	Dan Marsden 13 Feb 2013	17
	Setup a MySQL cluster for Moodle Locked	CP Lau 26 Oct 2012	Jonas Asa. 12 Nov 2014	17
	load user's picture very slow Locked	Shwu-Fen Kuo 3 Aug 2012	Shwu-Fen Kuo 10 Aug 2012	17
	Moodle Running Slow 2.0 (Memory keeps maxing out) Locked	Ryan Nelson 24 Mar 2012	James Richardson 30 Nov 2012	17
	server configuration for 50000 concurrent users Locked	Bav V 16 Mar 2011	Guillermo Madero 2 May 2011	17
	Question about a query pulled from MySQL slow query log Locked	Wen Hao Chuang 17 Oct 2009	Wen Hao Chuang 23 Oct 2009	17
	Statistics stupidly inefficient Locked	Bruce Webster 9 Mar 2009	Matteo Scaramuccia 22 Nov 2010	17
	hosting options Locked	Jennifer Claro 16 June 2008	Gary Benner 25 June 2008	17
	Planning new server hardware; and deciding between WAMP & LAMP Locked	Bob Majors 15 Jan 2008	Visvanath Ratnaweera 1 May 2008	17
	Specs for new server just for Moodle Locked	Mike Johnson 26 Jan 2006	Alex DePena 3 Nov 2007	17
	Moodle optimization Locked	David Delgado 1 Aug 2003	Tony Maite 6 Sept 2003	17
	Updating a plugin takes several hours	Dácil Blanco Francisco 30 Nov 2023	Dácil Blanco Francisco 17 Jan 2024	16
	Arguments in favour of PostgreSQL Locked	Mario Gharib 7 May 2021	Mario Gharib 26 May 2021	16
	A new "Large scale Moodle deployment" support group Locked	Nadav Kavalerchik 18 Nov 2020	Nadav Kavalerchik 24 July 2021	16
	Slow loading Admin pages Locked	Emma Richardson 3 Nov 2020	Emma Richardson 11 Nov 2020	16
	Moodle cluster setup and sessions Locked	Sven Laudel 20 Mar 2020	ADISAK CHAIKAEW 26 June 2020	16
	System Benchmark Writing file performance +/- 40 Locked	Dominique Palumbo 28 Feb 2020	Howard Miller 3 Mar 2020	16
	Moodle 3.7 Quiz for 15000 concurrent users via Mobile App? Is it possible? Locked	Sathiya Priya 19 Sept 2019	Visvanath Ratnaweera 24 Sept 2019	16
	moodle 3.x and bluehost shared hosting incompatibility? Locked	spyros zoup 17 Jan 2017	Dan Rosenthal 30 Jan 2017	16
	New setup questions Locked	Chris Cormier 18 Aug 2015	Chris Cormier 24 Aug 2015	16
	How to configure MongoDB caching? Locked	Paul Lindgreen 18 Feb 2014	Sugeng Suprayogi 6 Oct 2016	16
	MySQL Database Master/slave replication and other thoughts Locked	Michael Hughes 5 July 2013	Dmitriy Kuzevanov 30 Sept 2016	16
	Web Server for 100,000 users Locked	Nir Karniel 22 May 2013	Visvanath Ratnaweera 23 May 2013	16
	CPU USAGE 100% Locked	roc mehra 19 Dec 2012	Visvanath Ratnaweera 31 Dec 2012	16
	Further slowdown and incompatability in move from 2.2. to 2.3 Locked	Richard van Iwaarden 25 Sept 2012	Visvanath Ratnaweera 9 Oct 2012	16
	UnixBench Locked	Visvanath Ratnaweera 12 Apr 2012	Visvanath Ratnaweera 25 Sept 2013	16
	Proposed architecture for Moodle 2.x Locked	Cathal O'Riordan 1 Mar 2012	Andrew Lyons 27 June 2012	16
	Slow Moodle Locked	Rob Monk 14 Feb 2012	Richard Jones 21 June 2012	16
	Moodle 2 pluginfile.php performance Locked	Ben Graham 24 Aug 2011	Troo Don 27 Aug 2011	16
	Nginx (fronteend) + Apache2 (backend) + Moodle Locked	Ricardo Caiado 27 Aug 2010	Antonio Estrada 26 July 2011	16
	Convert innoDB back to MyISAM Locked	HJWUCGA INC. 29 Mar 2010	HJWUCGA INC. 11 May 2010	16
	Looking for examples of really HUGE Moodle installations Locked	David Mudrák 4 Feb 2009	Dan Marsden 25 May 2009	16
	Moodle virtual server/machine Locked	Greg Hayden 27 Feb 2008	Leo Dil 11 Feb 2010	16
	Comments on planned server hardware Locked	Jerico Tolentino 25 Jan 2008	Alex DePena 6 Feb 2008	16
	A Giant Query of 1.8 + Locked	Jai Gupta 11 June 2007	Dean Thayer 15 Apr 2008	16
	Halt on Login - Return blank page Locked	A. H. 10 July 2006	Iñaki Arenaza 8 Aug 2006	16
	Windows 2003 or linux Locked	mick marshall 2 Feb 2006	Visvanath Ratnaweera 10 May 2006	16
	I'm a MS Server 2003, IIS 6 admin - should we switch to LAMP? Locked	Philip Hermsmeyer 6 June 2005	Leonhard Küllinger 25 Oct 2005	16
	MySQL Clustering? Locked	Michael Penney 27 May 2005	Valery Fremaux 26 May 2009	16
	Server Loads Locked	Steve Edwards 22 Jan 2004	Sean McKay 24 July 2004	16
	seeking hosting company recommendations!! Locked	jordy koski 15 Dec 2003	David Mozealous 2 May 2006	16
	How many simultaneous users? Locked	Steven Smith 27 June 2003	Ger Tielemans 27 June 2003	16
	Scorm test 10,000 users simultaneously	Paolo Corsi 10 Oct 2023	Ron Meske 22 Oct 2023	15
	How to enhance the FCP and LCP performance factors in my site? Locked	Naaman Fallouh 4 Sept 2022	Naaman Fallouh 8 Sept 2022	15
	Slowness of Moodle Locked	Heather P 24 June 2022	Howard Miller 30 June 2022	15
	Unsuccessful Login with JMeter Locked	Andi Sugandi 18 June 2021	Visvanath Ratnaweera 2 July 2021	15
	A suitable VPS for up to 300 students taking a quiz within a window of 20 minutes? Locked	Luz Rodriguez 29 Sept 2020	Aruna IS 26 June 2021	15
	go unresponsive after 100 online users Locked	Jason Boscorelli 1 Sept 2020	Visvanath Ratnaweera 20 July 2021	15
	Scaling up Locked	John Fenig 20 Feb 2020	Matteo Scaramuccia 23 Feb 2020	15
	Config Memcached Locked	Dennis V 14 Dec 2019	Thorsten Bartel 9 Jan 2020	15
	[Moodle Benchmark] Is it applicable to non-x86 architectures? Locked	Visvanath Ratnaweera 21 Nov 2019	AL Rachels 10 Mar 2020	15
	General performance question Locked	Heinz Felfe 5 June 2019	Rick Jerz 8 June 2019	15
	Caching & Application Cache in Cluster Locked	Saad Zaman 22 Apr 2019	Saad Zaman 1 May 2019	15
	Need a script that would display a node number of a load balanced system - 5 nodes Locked	Ken Task 27 July 2018	Andreas Panagiotopoulos 9 Aug 2018	15
	Moodle Performance Issues (Load Balancer / Cluster) (Willing to Pay for Help) Locked	Amber Lynn 15 Feb 2017	Christos Savva 29 July 2017	15
	Moodle Crashing Every Night Locked	Scott Tolan 27 May 2015	Jeff White 29 May 2015	15
	Hardware Sizing with Cluster Service Locked	Sanchai Leelahakiat 4 Dec 2013	Albert Ramsbottom 8 Jan 2014	15
	Size problems: files not cleaned Locked	David Dunn 13 Aug 2013	Guillermo Madero 16 Aug 2013	15
	Extremely slow SCORM module performance, pluginfile retrieval, but only on a specific course and ... Locked	Mathew Gancarz 16 Aug 2012	Mathew Gancarz 31 Aug 2012	15
	My Moodle site runs really slow in the computer lab; home users are okay Locked	Frankie Kam 5 Jan 2011	Visvanath Ratnaweera 11 Feb 2011	15
	Maintenance Concerns Locked	Jet Batung Bakal 6 Oct 2009	Jet Batung Bakal 9 Oct 2009	15
	Tunning moodle+apache+mysql+php RHEL 5 Locked	Tadeu do Carmo Alves 9 Mar 2009	Tadeu do Carmo Alves 24 Mar 2009	15
	Nginx for our performance tweakers Locked	Visvanath Ratnaweera 22 Aug 2008	Jason O'Neil 31 Mar 2011	15
	Server Sizing Guide for Moodle Locked	Mark Stevens 10 Dec 2004	Mikael Ekblom 15 Dec 2004	15
	Site loading Time [ Please Test] Locked	Conrad Taylor 25 Sept 2004	Ger Tielemans 26 Sept 2004	15
	Apache on Novell -- ABEND Locked	Michele Balazs 23 Sept 2004	Michele Balazs 19 Oct 2004	15
	Server Does Not Support JPEG Locked	Thomas Bray 23 Feb 2004	Marcus Green 26 Feb 2004	15
	Recent problems at Netmondo? Locked	Thomas Bray 22 Feb 2004	Don Hinkelman 23 Feb 2004	15
	Hosting Locked	Jacob Romeyn 25 July 2003	Art Lader 9 Jan 2004	15
	Nginx configuration as frontend server and load balancer Locked	Ваня Житников 10 May 2021	Visvanath Ratnaweera 29 May 2021	14
	Cluster design for 15,000 concurrent users in Moodle Locked	Talhah Khan 5 Aug 2020	Amir Fouladvand 12 May 2021	14
	Help! Database server CPU maxed out Locked	Ben Kahn 27 Aug 2019	Jerry Lau 12 Sept 2019	14
	Redis caching and unix socket configuration Locked	Alain Raap 5 Aug 2019	Alain Raap 19 Aug 2019	14
	Slowest queries are inserting single row into mdl_sessions Locked	Diane Soini 9 Apr 2019	Jerry Lau 17 Apr 2019	14
	Off-boarding ClamAV from web nodes? Locked	Jeff White 20 Feb 2019	Jeff White 7 May 2019	14
	Loading issue in moodle for our site Locked	Leena Nikhare 18 Dec 2017	sulagna behera 20 Dec 2017	14
	Server Hardware Requirement for 300 User Locked	Aditya Gautam 24 Apr 2017	James Steerpike 10 June 2017	14
	Moodle on AWS load balancing Architecture Locked	Steve Pollock 19 Apr 2017	Tawfik Daim 21 Oct 2017	14
	Central Moodle instance sync to local instance - updated Locked	Paa Kwesi 25 Jan 2017	Paa Kwesi 13 Mar 2017	14
	MySQL CPU - Moodle Locked	A J 21 Dec 2016	Howard Miller 4 Jan 2017	14
	Slow file download and playing SCORM videos Locked	Sali Kaceli 7 Oct 2016	Nelson Moller 2 Oct 2017	14
	An update on cache landscape (Linux-based) Locked	Visvanath Ratnaweera 6 May 2015	Albert Ramsbottom 23 June 2015	14
	How to run the database performance script in Moodle Locked	Mari Cruz García 4 Feb 2014	Ken Task 11 Feb 2014	14
	What makes the "Teaching with Moodle" MOOC course work so well? Locked	Rick Jerz 2 Sept 2013	Anna Jonna Ármannsdóttir 28 Nov 2013	14
	Moodle set up for 60 concurrent quiz users Locked	Jeff Baldmann 23 Mar 2013	jason everling 6 Dec 2013	14
	Enabling automatic backups slows down server now Locked	Ethan Z 15 Feb 2013	Ken Task 21 Feb 2013	14
	Database server of Moodle 2.3.1 is a bottleneck Locked	CP Lau 16 Sept 2012	Simon Story 8 Oct 2012	14
	Moodle 2.2.2+ & GoDaddy 4GH Locked	Márton Bacsó 5 Apr 2012	Rick Jerz 10 June 2013	14
	Moodle Hosting in India Locked	Ashutosh Taunk 8 Feb 2012	Ravindra Narula 1 Dec 2014	14
	Where are the cycles going in 2.2 Locked	greg mushial 29 Jan 2012	sam marshall 1 Feb 2012	14
	Troubleshooting performance : what does the following mean : ticks: 69 user: 52 sys: 3 cuser: 0 ... Locked	Mireille Raad 31 May 2010	rushabh hathi 8 July 2014	14
	News instalation (20k registered users / 1k concurrent users) Locked	Renato Jr 26 Nov 2009	Valery Fremaux 27 Feb 2010	14
	Cron on a separate server Locked	Jai Gupta 1 July 2009	Jai Gupta 8 July 2009	14
	Moodle Scalability Challenge (WISP setup) Locked	Lee Mears 16 May 2009	L Cramer 19 May 2011	14
	Course disk usage Locked	Sebastián Espinosa 3 Apr 2009	Elvedin Trnjanin 13 Apr 2009	14
	Moodle Hosting, What do I need Locked	jonnym m 31 Mar 2009	E. L. Cooper 14 Apr 2009	14
	New moodle.org Locked	Martin Dougiamas 4 Mar 2009	HJWUCGA INC. 15 July 2009	14