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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
	CPU SERVER 97% Locked	paco padilla 11 May 2012	Simon Story 14 May 2012	8
	CPU usage - /moodle/theme/styles_debug.php Locked	Jako Olivier 26 May 2021	Visvanath Ratnaweera 27 May 2021	3
	CPU USAGE 100% Locked	roc mehra 19 Dec 2012	Visvanath Ratnaweera 31 Dec 2012	16
	CPU usage 100% on NoSupportLinuxHosting Locked	Dan O'Reilly 20 Dec 2012	Ken Task 22 Dec 2012	11
	CPU usage High Locked	manoj joseph 30 June 2020	Visvanath Ratnaweera 7 July 2020	13
	CPU-hogging problems, anyone? (Help!) Locked	Wendi Dunlap 19 June 2004	Wendi Dunlap 23 June 2004	2
	Crashing under increased activity... But not a lot ... 20 users maybe at the same time? Locked	Billy Zwiener 27 Apr 2016	Billy Zwiener 27 Apr 2016	6
	create new course and delete empty course take 3 minutes	Rizal Masandiansyah 8 Sept 2023	Visvanath Ratnaweera 12 Sept 2023	7
	Creating a harddrive backup Locked	M Y 25 Feb 2006	M Y 25 Feb 2006	4
	Creating a list of meaningful metrics to observe performance Locked	Jerry McAllister 5 Aug 2011	Jerry McAllister 10 Aug 2011	3
	Creating GlusterFS for moodledata Locked	Ariff Khalid 6 Mar 2021	Ian Wild 8 Sept 2021	9
	creation and deletion of courses is very slow Locked	elvys cruz 16 May 2021	Visvanath Ratnaweera 30 May 2021	3
	CRITICAL PROBLEM WITH MOODLE HOSTING!!!! Locked	Carlos Morales Socorro 30 Nov 2007	Steve Hyndman 4 Feb 2008	29
	cron error Locked	Evelien Fick 23 July 2005	Evelien Fick 23 July 2005	0
	Cron error in Apache logs Locked	Philip Edwards 25 Sept 2006	Philip Edwards 25 Sept 2006	0
	Cron Execution can last 5+ hours Locked	Jamie E 21 Jan 2009	Martin Plummer 27 Oct 2009	10
	Cron for two web servers Locked	Albert Ramsbottom 16 Oct 2013	Guillermo Madero 18 Oct 2013	11
	Cron in a Cluster Locked	R.T. Brown 19 Apr 2013	R.T. Brown 20 Apr 2013	3
	Cron job - 2 web servers - different schedule Locked	Job Céspedes Ortiz 17 Dec 2014	Andrew Lyons 17 Dec 2014	1
	cron job aborted by provider causes collateral damage Locked	Pieter van der Hijden 7 Mar 2009	Howard Miller 7 Mar 2009	1
	Cron job is endlessly editing calendar in specific restored courses Locked	Michael Deal 8 Aug 2014	Jon Marthaler 22 Aug 2014	11
	cron job on a hosted site Locked	Alex Delaforce 27 Dec 2014	Alex Delaforce 31 Dec 2014	6
	Cron Job questions Locked	Melissa Benson 11 Apr 2015	Deleted user 20 Oct 2016	19
	Cron Jobs on Shared Hosting	Marc Mereyde 22 Aug 2023	Visvanath Ratnaweera 22 Aug 2023	4
	Cron load issue Locked	Randy Obert 12 June 2006	Randy Obert 13 June 2006	6
	Cron on a separate server Locked	Jai Gupta 1 July 2009	Jai Gupta 8 July 2009	14
	Cron Runtime Locked	Jordan White 30 Jan 2014	Ken Task 30 Jan 2014	1
	Cron script fails Locked	Javier Lázaro 26 Dec 2006	Iñaki Arenaza 29 Dec 2006	3
	Cron takes too long to complete - It stucks on "Running completion_criteria_activity->cron()" Locked	Paula Roque 6 Dec 2017	Paula Roque 13 Dec 2017	1
	Cron task making httpd irresponsive? Locked	Luca Bösch 27 Feb 2017	Paul Verrall 20 Mar 2017	5
	Cron- slow when manually run, won't work from a scheduled task Locked	Heather P 11 Apr 2013	Heather P 19 Apr 2013	2
	Cron: once more Locked	Hans de Zwart 8 Jan 2004	Britt Malka 29 Mar 2005	23
	Cron.php Locked	Ângelo Rigo 24 Sept 2007	Ângelo Rigo 24 Sept 2007	0
	cron.php backup takes more than 24 hours Locked	Tobias Marx 6 Sept 2007	Tobias Marx 10 Sept 2007	2
	cron.php leads to a very high cpu usage Locked	hugo joe 4 July 2012	Visvanath Ratnaweera 11 Aug 2012	10
	Cron.php really slow Locked	Rob Hudson 14 May 2008	Rob Hudson 14 May 2008	0
	Cronjob and Moodle response Locked	Guillaume Seraglini 15 Feb 2012	Guillaume Seraglini 15 Feb 2012	2
	CSS not being found on external access Locked	Steve Blakemore 9 Jan 2008	Paul Holden 22 Jan 2008	1
	CSS often fails on IE6/7 (but not FF) Locked	Shaun Daubney 1 July 2008	Shaun Daubney 1 July 2008	0
	Current Locked	Cesar Almanza 12 Jan 2016	Cesar Almanza 22 Jan 2016	4
	Current Server = 5 users max... need a new server? Locked	Josh Jones 8 Jan 2010	Marcus Green 26 Jan 2010	9
	CVS client Locked	William Minto 5 Feb 2004	William Minto 5 Feb 2004	0
	Damn Small Linux Locked	M Y 5 Feb 2006	Visvanath Ratnaweera 6 May 2008	4
	dashboard make error dmlreadexception Locked	Mojtaba Baghban 1 Sept 2020	Mojtaba Baghban 1 Sept 2020	1
	Data Privacy and Large Moodles Locked	David Dixon 8 Mar 2019	David Dixon 12 Mar 2019	2
	Database Clustering (revisited?) Locked	Noveck Gowandan 2 Feb 2013	suzancondreywo Dreywo 14 Mar 2013	2
	Database Connection - beginner`s questions Locked	Márcio Vilaça 2 May 2008	Myles Carrick 5 May 2008	4
	Database connection error Locked	Jeff Wood 13 Jan 2005	Jeff Wood 13 Jan 2005	5
	Database Connection Failed Locked	Gilbert Loyogoy 25 Aug 2020	James Steerpike 26 Aug 2020	3
	Database connection failed error Locked	Shakir Gill 7 July 2021	Visvanath Ratnaweera 9 July 2021	4
	database connection failed! Locked	Zahra E 6 June 2009	Justin Haaga 25 June 2009	8
	database connection failure Locked	shahin ghanei 10 Jan 2006	N Hansen 12 Jan 2006	7
	Database connection failure Locked	Guest User 8 Feb 2006	Guest User 14 Feb 2006	4
	database connection is failed or database is not running properly Locked	Abu Ali 1 Oct 2020	Visvanath Ratnaweera 3 Oct 2020	5
	database connection limits to 400 Locked	Jonathan Lam 18 Nov 2020	Jonathan Lam 18 Nov 2020	0
	Database Connection Overload Locked	Edilberto Solis, Jr. 4 Sept 2020	Edilberto Solis, Jr. 4 Sept 2020	0
	database is overloaded Locked	Abu Ali 14 Oct 2019	Howard Miller 15 Oct 2019	4
	Database issues Locked	Steven Geggie 15 July 2006	Steven Geggie 15 July 2006	1
	Database Issues Locked	Obada Qafisheh 24 Aug 2021	Obada Qafisheh 24 Aug 2021	0
	Database keep on consuming RAM Locked	Liko Purba 4 Mar 2021	Visvanath Ratnaweera 4 Mar 2021	1
	Database Load 1.8.1 Locked	Jez H 20 July 2007	Tim Hunt 4 Nov 2007	5
	database making course load very slow Locked	Nicola Bennett 5 Feb 2007	Ken Wilson 18 Feb 2007	1
	Database MysQL Gui 5.0 and Postgres in the performance of moodle Locked	Jet Batung Bakal 12 Oct 2009	Jet Batung Bakal 12 Oct 2009	1
	Database Overload Locked	allen haney 18 Apr 2013	Howard Miller 20 Apr 2013	13
	Database overload everyday at 1.00pm - err Locked	Seth Mengal 27 Feb 2014	james mergenthaler 11 Apr 2014	8
	database performance Locked	Hannu Tikka 10 June 2021	Hannu Tikka 14 June 2021	3
	Database permomance issue Locked	manoj joseph 29 Oct 2020	manoj joseph 31 Oct 2020	1
	Database read error when user try to login... Locked	Ricardo Caiado 10 May 2016	Ricardo Caiado 11 May 2016	3
	Database server of Moodle 2.3.1 is a bottleneck Locked	CP Lau 16 Sept 2012	Simon Story 8 Oct 2012	14
	Database Servers Locked	Scott Karren 20 May 2004	Scott Karren 21 May 2004	1
	Database size / performance - Moodle 2.0.2 Locked	Class Virtual 14 Sept 2011	Class Virtual 14 Sept 2011	0
	Databases connection error Locked	selim aktar khan 15 May 2013	Fernando Rocha 18 May 2013	2
	datamodel.php file using all resources on server Locked	G D 28 June 2007	G D 28 June 2007	2
	DB Session Timeout Locked	Ricardo Caiado 13 Sept 2020	Thorsten Bartel 21 Sept 2020	1
	DB slowing down whan many users online Locked	Abror Aliboyev 20 Sept 2020	Ken Task 21 Sept 2020	1
	dbperformance interpretation Locked	Mariana vd Walt 29 July 2007	Mariana vd Walt 30 July 2007	2
	dbperformance: "InnoDB cache hit ratio" is 0 Locked	Andreas Vandelaar 1 Mar 2004	Eloy Lafuente (stronk7) 1 Mar 2004	3
	dbperformance.php on innodb Locked	Lael ... 20 Feb 2012	Visvanath Ratnaweera 26 Apr 2012	2
	dbpersist on Postgres with PGPool? Locked	Richard Heath 24 Nov 2017	Richard Heath 24 Nov 2017	0
	dbpersist=true Locked	Joar Herseth 24 Sept 2003	Steve Dubois 28 Oct 2003	1
	dbsessions and max_allowed_packet Locked	Ricardo Santos 19 Nov 2013	Miryam Moreno Pacheco 10 Feb 2014	3
	dcachesize on server going high on my server and causing server problems Locked	Billy Zwiener 19 Dec 2015	Billy Zwiener 21 Dec 2015	2
	Dealing with "login storm" Locked	Colin Matheson 18 Dec 2014	ryan sanders 8 Jan 2015	3
	Dear documentation team, Locked	Ger Tielemans 28 Oct 2005	Samuli Karevaara 30 Oct 2005	10
	Debugging Debug report.... Locked	Steve Ambro v3.8 11 July 2016	Steve Ambro v3.8 11 July 2016	2
	Decentralized Course Materials Locked	Calvin Vong 1 June 2015	Rick Jerz 2 June 2015	4
	Decrease number of database queries per page view - use memcached? Locked	Alexander Bias 16 Jan 2012	David Ackerman 25 Jan 2012	13
	Decreased performance through multiple category enrollments?	Mike Wilday 6 Mar 2024	Mike Wilday 6 Mar 2024	0
	Dedicated Server or Linux Locked	Cindy Fajardo 24 Aug 2006	Richie Foreman 24 Aug 2006	4
	Delay between quiz question pages (how do I eliminate it?) Locked	A Guy 30 Sept 2012	A Guy 3 Oct 2012	5
	Delayed mailings Locked	Sergio Comerón 1 Feb 2018	Sergio Comerón 22 Feb 2018	3
	deleting archived courses from moodledata Locked	Steven Silvern 14 July 2015	Steven Silvern 16 July 2015	11
	Deleting course slow?? Locked	Judy Hsu 21 Aug 2014	Tim Hunt 21 Aug 2014	1
	Dell PowerEdge M600 or Desktop running Ubuntu? Locked	Fahed Alrafidi 4 Dec 2008	Visvanath Ratnaweera 4 Dec 2008	1
	Dell PowerEdge T610 for 3000 users Locked	Ryan Schopp 19 Mar 2012	Visvanath Ratnaweera 23 Mar 2012	2
	Deploy Moodle on AWS EC2 Locked	Iman Al-Kindi 8 Oct 2016	Grant Mucha 1 Nov 2016	3
	Deploying Moodle 3.3 on an IIS cluster. Locked	Joe Cape 20 July 2017	Joe Cape 25 July 2017	4
	Deploying Moodle on HP Proliant Server Locked	Chris Ekin 22 June 2015	Tim Hunt 23 June 2015	5
	Deployment Question Locked	Suzanne Bogovich 5 Oct 2010	Visvanath Ratnaweera 6 Oct 2010	3
	Design Constraints of Moodle Locked	Bertie Corrie 2 Apr 2014	Bertie Corrie 2 Apr 2014	3