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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
	Sessions in Database problem with Adodb Locked	Taylor Judd 17 Sept 2008	Wen Hao Chuang 25 Mar 2009	19
	Problem zipping & unzipping on the server Locked	Ted Max 25 June 2010	Ted Max 26 June 2010	3
	System Requirements: Moodle for 100000+ Students and 10000 simultaneous users Locked	Ted Celestin 10 Feb 2012	Pavel Gonzalez Garcia 6 Apr 2012	5
	Bandwidth for php files has doubled. What could be the cause? Locked	Ted O'Neill 20 May 2020	Visvanath Ratnaweera 21 May 2020	4
	Disk partitioning on Moodle server Locked	Teemu Koistinen 26 Apr 2006	Visvanath Ratnaweera 30 Apr 2006	5
	To host or not to host a moodle site Locked	Teresa Fryer 11 Feb 2016	Visvanath Ratnaweera 28 July 2016	24
	Moodle disconnects during chat Locked	Teresa Fryer 12 Feb 2016	Visvanath Ratnaweera 13 Feb 2016	2
	Moodle on Shared Hosting Issue Locked	Terry Waterman 28 Apr 2022	Justin Hunt 28 May 2022	11
	Error Log - Shared Server Resources? Locked	The Web Side 30 June 2020	The Web Side 13 Aug 2020	9
	Moodle in cluster Locked	The Sien 17 Dec 2021	Usman Asar 12 Jan 2022	11
	Scaleablity of Moodle Locked	Theo Stone 25 Jan 2004	Vipen Mahajan 21 June 2008	14
	3000 concurrent users in a course Locked	Theocharis Livieratos 20 Apr 2018	Howard Miller 20 Apr 2018	5
	Moodle slow when logging in and navigating to home. Locked	Theunis Victor 20 Sept 2017	Ken Task 22 Sept 2017	5
	VPS Configuration Locked	Thiago Nunes 7 Oct 2016	Howard Miller 7 Oct 2016	2
	Moodle server on android smartphone Locked	Thierry Coilhac 14 Jan 2022	Visvanath Ratnaweera 9 Feb 2022	3
	Moodle scalability Locked	Thinh Dang 15 June 2019	Ray Hinton 20 June 2019	3
	How to scale Moodle in my case Locked	Thinh Dang 14 Apr 2020	Howard Miller 15 Apr 2020	1
	Moodle 2.0 - Mysterious Speed-up? Locked	Thom Stricklin 11 Jan 2012	Thom Stricklin 12 Jan 2012	3
	Moodle 3.11 Dashboard performance with completion tracking enabled Locked	Thom Rawson 13 Nov 2021	Emma Stone 21 Jan 2023	6
	sudden slowdown Locked	Thomas Haynes 18 Sept 2003	Thomas Haynes 26 Sept 2003	7
	Recent problems at Netmondo? Locked	Thomas Bray 22 Feb 2004	Don Hinkelman 23 Feb 2004	15
	Issues With Fantastico Locked	Thomas Bray 22 Feb 2004	NetMondo Web Services 23 Feb 2004	2
	Smaller Quizes Locked	Thomas Bray 23 Feb 2004	Ger Tielemans 28 Feb 2004	4
	Server Does Not Support JPEG Locked	Thomas Bray 23 Feb 2004	Marcus Green 26 Feb 2004	15
	Running Slow Locked	Thomas Bray 2 Apr 2004	Thomas Bray 2 Apr 2004	0
	OT: Netmondo database outages Locked	Thomas Bray 12 Apr 2004	Don Hinkelman 13 Apr 2004	1
	Servers and Hosting Locked	Thomas Bray 4 May 2004	James Sangster 13 May 2004	3
	Low Cost Moodle ISPs With Fantastico Locked	Thomas Bray 31 Aug 2004	Forrest Nelson 8 Sept 2004	2
	Requested Range Not Satisfiable Locked	Thomas Haynes 1 Dec 2004	Thomas Haynes 5 Jan 2005	24
	Using Fantastico to Move moodle to New URL Locked	Thomas Bray 14 June 2005	Thomas Bray 4 July 2005	3
	SCORM responsiveness - too slow. Locked	Thomas Tyson 19 June 2008	Todd Thornton 10 July 2008	2
	Moodle Cluster Apache crashes Locked	Thomas Haines 6 Nov 2008	Thomas Haines 11 Nov 2008	8
	Windows Vista --Vs-- Windows XP Locked	Thomas Saccardi 28 Jan 2009	Thomas Saccardi 28 Jan 2009	0
	problems with PHP and eAccelerator installed from yum Locked	Thomas Haines 24 Aug 2009	Thomas Haines 24 Aug 2009	0
	[3.8] - Syntax error from error_log (Admin/cli) Locked	Thomas Renard 6 Jan 2020	Howard Miller 7 Jan 2020	4
	[3.8] - ERR_EMPTY_RESPONSE Locked	Thomas Renard 12 Jan 2020	Thomas Renard 14 Jan 2020	3
	[3.8] - PHP memory limit / cache problem / shared hosting Locked	Thomas Renard 19 Jan 2020	Howard Miller 20 Jan 2020	1
	[Moodle 3.10] Login Performance Locked	Thomas Renard 27 Dec 2020	Thomas Renard 4 Jan 2021	7
	HTTP Error 500.0 - Internal Server Error Locked	Thomas College 30 Sept 2021	Heather P 5 Sept 2022	4
	"Memcache" cache store what data is cached? Locked	Thorsten Bieser 8 June 2016	Thorsten Bieser 9 June 2016	4
	Ad hoc Tasks and Performance Locked	Thorsten Bieser 29 Apr 2020	Thorsten Bieser 30 Apr 2020	2
	moodle system going down/getting stuck very often Locked	thulasi raman 13 Dec 2011	Visvanath Ratnaweera 11 Jan 2012	5
	CPU Problems Locked	Tiago Fischer 13 July 2007	Matt Gibson 31 Oct 2007	8
	Improve performance in moodle 2.0.2 Locked	Tiago Santos 18 Mar 2011	Visvanath Ratnaweera 23 Mar 2011	8
	Set up Moodle for 4000 users on Linux for my university Locked	Tien Do 31 May 2021	Visvanath Ratnaweera 8 June 2021	11
	User peformance based on platform Locked	Tiffany Morgan 8 Apr 2009	Tiffany Morgan 16 Apr 2009	11
	VMWare for Moodle 2.2 Locked	Tiffany Morgan 25 Apr 2012	Visvanath Ratnaweera 26 Apr 2012	6
	Sudden Proxy Error, no recent system changes Locked	Tiffany Morgan 14 May 2019	Howard Miller 26 Feb 2020	10
	Becoming my own sysadmin Locked	Tim Allen 17 Dec 2003	Tim Allen 18 Dec 2003	20
	Which Redhat? Locked	Tim Allen 9 Jan 2004	Al Futrell 16 Jan 2004	3
	Serious Server Problem: Help Greatly Appreciated Locked	Tim Allen 8 Sept 2004	Tim Allen 8 Sept 2004	3
	PHP 5 and acceleration Locked	Tim Allen 20 Apr 2005	Genner Cerna 20 Apr 2005	1
	Very strange problem with file sizes and PHP Locked	Tim Allen 16 May 2005	Tim Allen 16 May 2005	2
	Resource URLs Locked	Tim Howarth 10 Jan 2006	Tim Howarth 10 Jan 2006	0
	Pros and cons of different architectures Locked	Tim Thomas 28 Aug 2006	Brett Drinkwater 1 Sept 2006	11
	Apache performance issues Locked	tim harrison 29 Aug 2006	tim harrison 1 Sept 2006	6
	VMWare: Any problems with ESX? Locked	Tim Nelson 13 Feb 2007	Taylor Judd 5 Nov 2008	7
	THe best program for Video conferencing in MOODLE??? Locked	Tim Fanning 30 Apr 2009	Manuel Padilla Heredia 2 May 2009	3
	New platform for deploying Moodle Locked	Tim Hunt 28 June 2009	Tim Hunt 28 June 2009	0
	New section in the coding guidelines about performance Locked	Tim Hunt 26 Nov 2009	Tim Hunt 26 Nov 2009	0
	Problems with cron after upgrading to 2.1.x -> 2.2.x Locked	Tim Hunt 3 Apr 2012	Tim Hunt 11 Apr 2012	3
	Moodle 2.4 performance Locked	Tim Hunt 3 May 2013	Michael Haskell 21 June 2013	10
	Moodle 2.5 performance testing at the OU Locked	Tim Hunt 16 Nov 2013	Tim Hunt 19 Feb 2014	17
	Moodle 2.6 performance :-) Locked	Tim Hunt 26 Apr 2014	Mathew Gancarz 26 Apr 2014	1
	If anyone else having performance problems with Locally assigned roles Locked	Tim Hunt 25 Sept 2014	Tim Hunt 25 Sept 2014	0
	Proposal to turn on quiz auto-save by default Locked	Tim Hunt 7 Oct 2014	Tim Hunt 7 Oct 2014	0
	Newbie ? - Short video clip storage Locked	Tim Edsell 6 Feb 2015	Tim Edsell 6 Feb 2015	0
	Performance of the Assignment tool Locked	Tim Hunt 1 Mar 2016	Tim Hunt 1 Mar 2016	0
	Two suggestions for when you are running your load tests Locked	Tim Hunt 5 Oct 2016	Tim Hunt 8 Oct 2016	5
	How to interpret MySQL-Tuner Perl results? Locked	Tim Kamps 15 Aug 2017	Tim Kamps 15 Aug 2017	6
	Bad RAM-use performance from get_records [MDL-66327] Locked	Tim Hunt 6 Aug 2019	Andrew Lyons 8 Aug 2019	1
	Recent Degredation on Moodle Performance Locked	Tim Gildersleeve 15 Jan 2020	Tim Gildersleeve 16 Jan 2020	5
	Initial moodle setup Locked	Tim David 1 Apr 2023	Visvanath Ratnaweera 6 Apr 2023	8
	Disk space of one profile Locked	Timo Kozlowski 26 June 2006	Timo Kozlowski 26 June 2006	0
	Standard Apache Settings? mod_become and "as root" Locked	Timothy Takemoto 22 Nov 2005	Timothy Takemoto 23 Nov 2005	4
	Most Secure Permissions of Moodle Files Locked	Timothy Takemoto 13 Dec 2005	nabil Lachheb 13 Mar 2011	10
	Input on Large Scale Install 30,000+ users Locked	Timothy Guy 3 Dec 2010	Ricardo Caiado 4 Dec 2010	8
	Moodle Implementation/Feasibility Study Locked	Tina Piper 29 Sept 2006	Visvanath Ratnaweera 29 Sept 2006	1
	Moodle Portal Locked	Tina Piper 20 Oct 2006	Robert Brenstein 12 Nov 2006	4
	Moodle Installation Information Locked	Tina Piper 5 Apr 2007	Tony Hursh 6 Apr 2007	1
	many queries at login after update to 1.8.2+ Locked	Tobias Marx 17 Aug 2007	Wen Hao Chuang 5 Sept 2007	4
	rearranging course categories is very slow Locked	Tobias Marx 21 Aug 2007	Rosario Carcò 13 Sept 2010	26
	cron.php backup takes more than 24 hours Locked	Tobias Marx 6 Sept 2007	Tobias Marx 10 Sept 2007	2
	Hardware for 1400 users Locked	Tobias Ceglarek 1 Oct 2013	jason everling 2 Oct 2013	1
	hardware software sizing Locked	Tobias Olausson 21 Feb 2014	Tobias Olausson 21 Feb 2014	6
	slow site admin loading Locked	Tod Anderson 12 Sept 2012	Tod Anderson 18 Sept 2012	2
	Moving from Dev to QA to Production Servers - Problems! Locked	Todd Cranston-Cuebas 25 May 2006	Todd Cranston-Cuebas 26 May 2006	3
	Dual Core Xeon (Woodcrest) Locked	Todd Thornton 18 Nov 2006	Jay Lee 19 Nov 2006	1
	New Dedicated Server- Which MYSQL and PHP versions should I use? Locked	Todd Thornton 21 Nov 2006	Todd Thornton 28 Nov 2006	9
	Moodle site Hangs Up- "Could not find forum module!!" Locked	Todd Thornton 30 July 2007	Todd Thornton 30 July 2007	1
	Win 2k3/IIS6 - CPU Spike Locked	Todd Bryant 5 Dec 2007	Visvanath Ratnaweera 5 Dec 2007	2
	Dual Dual Xeon's or Dual Quad Harpertowns Locked	Todd Thornton 22 July 2008	Sojiro Sato 22 July 2008	1
	Moodle 1.8+ Poor server response time Locked	todd vainisi 20 Aug 2008	todd vainisi 26 Aug 2008	3
	Content Pre-positioning Locked	todd vainisi 20 Apr 2011	todd vainisi 21 Apr 2011	2
	installed moodle 3.4.1 and it is slow. Locked	TokiyoRio TokiyoRio 18 Sept 2019	Colin Fraser 19 Sept 2019	3
	How does Moodle scale? Locked	Tom Boyle 1 Oct 2004	Sam O 3 Oct 2004	3
	slow slow quick quick slow Locked	Tom Denton 18 Jan 2006	Art Lader 18 Jan 2006	1
	What server to use Locked	Tom Wootton 15 Apr 2011	Renaat Debleu 3 May 2011	6
	Moodle Statistics block slowing down moodle Locked	Tom Moseley 20 Feb 2013	J S 18 Mar 2013	5
	Where to start choosing a server spec for moodle 2.# Locked	Tom Moseley 5 June 2013	Tom Moseley 5 June 2013	0