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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
	Cron Execution can last 5+ hours Locked	Jamie E 21 Jan 2009	Martin Plummer 27 Oct 2009	10
	Cron error in Apache logs Locked	Philip Edwards 25 Sept 2006	Philip Edwards 25 Sept 2006	0
	cron error Locked	Evelien Fick 23 July 2005	Evelien Fick 23 July 2005	0
	CRITICAL PROBLEM WITH MOODLE HOSTING!!!! Locked	Carlos Morales Socorro 30 Nov 2007	Steve Hyndman 4 Feb 2008	29
	creation and deletion of courses is very slow Locked	elvys cruz 16 May 2021	Visvanath Ratnaweera 30 May 2021	3
	Creating GlusterFS for moodledata Locked	Ariff Khalid 6 Mar 2021	Ian Wild 8 Sept 2021	9
	Creating a list of meaningful metrics to observe performance Locked	Jerry McAllister 5 Aug 2011	Jerry McAllister 10 Aug 2011	3
	Creating a harddrive backup Locked	M Y 25 Feb 2006	M Y 25 Feb 2006	4
	create new course and delete empty course take 3 minutes	Rizal Masandiansyah 8 Sept 2023	Visvanath Ratnaweera 12 Sept 2023	7
	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
	CPU-hogging problems, anyone? (Help!) Locked	Wendi Dunlap 19 June 2004	Wendi Dunlap 23 June 2004	2
	CPU usage High Locked	manoj joseph 30 June 2020	Visvanath Ratnaweera 7 July 2020	13
	CPU usage 100% on NoSupportLinuxHosting Locked	Dan O'Reilly 20 Dec 2012	Ken Task 22 Dec 2012	11
	CPU USAGE 100% Locked	roc mehra 19 Dec 2012	Visvanath Ratnaweera 31 Dec 2012	16
	CPU usage - /moodle/theme/styles_debug.php Locked	Jako Olivier 26 May 2021	Visvanath Ratnaweera 27 May 2021	3
	CPU SERVER 97% Locked	paco padilla 11 May 2012	Simon Story 14 May 2012	8
	CPU running at 95%..why!!! Locked	Julian Ridden 14 June 2005	John Rodgers 22 July 2005	18
	cpu reach 100% Locked	Achala Karunarathne 3 Mar 2021	Achala Karunarathne 4 Mar 2021	9
	CPU QUOTA EXCEEDED: moodle or server problem? Locked	Peter Ruthven-Stuart 19 Oct 2005	Samuel Cochran 19 Oct 2005	1
	CPU Problems Locked	Tiago Fischer 13 July 2007	Matt Gibson 31 Oct 2007	8
	CPU overloaded Locked	Bernat Martinez 3 July 2017	Bernat Martinez 6 July 2017	6
	cpu overload Locked	Ray Le Couteur 1 Feb 2003	Huib van Wees 30 Aug 2003	9
	CPU Last 100%	André Krauß 5 Jan 2024	Visvanath Ratnaweera 5 Jan 2024	1
	Courses for 6000 students Locked	Lorenzzo Mollinar 11 Apr 2017	Usman Asar 11 Apr 2017	1
	Course-level backup on large-ish instance Locked	Mark van Hoek 30 Oct 2018	Susan Mangan 1 Nov 2018	2
	course-completion-report Locked	Deleted user 19 Sept 2014	jason white 27 Feb 2015	4
	Course participant page takes a long time to load	Grupo Dabo Consulting Empresarial S.L. 22 Mar 2024	Howard Miller 3 Apr 2024	3
	Course Format Impact on Performance Locked	Paul Lindgreen 9 Oct 2015	Visvanath Ratnaweera 9 Oct 2015	1
	Course Enrol Button Locked	David O'Brien 19 Sept 2006	Ken Wilson 21 Sept 2006	1
	Course disk usage Locked	Sebastián Espinosa 3 Apr 2009	Elvedin Trnjanin 13 Apr 2009	14
	course completion issue Locked	Leena Nikhare 22 Dec 2017	Ken Task 28 Dec 2017	12
	Course Backup, Restoration and Deletion is very slow	Marco Cigna 1 Nov 2023	Marco Cigna 1 Nov 2023	6
	course Locked	swati c 24 Dec 2009	James Jameson 30 Dec 2009	1
	Count hits on my MOODLE site Locked	fouzia imran 9 Aug 2006	Heather P 24 Aug 2006	4
	Could you report number of courses and users of your Moodle site? Locked	David Delgado 4 Mar 2004	Herbert Keijers 7 Mar 2004	10
	Could not insert record info in database. Locked	Neelima Ramesh 4 Jan 2010	Visvanath Ratnaweera 24 Feb 2010	1
	Could not handle 60 requests at a time for online quiz Locked	Santhosh Chandra 10 June 2017	Usman Asar 11 June 2017	2
	Could Moodle support a shared nothing architecture? Locked	Cathal O'Riordan 22 Feb 2012	Cathal O'Riordan 23 Feb 2012	2
	Cost of Moodle Locked	Deleted user 18 Nov 2009	Visvanath Ratnaweera 22 Nov 2009	9
	Correct value of innodb_buffer_pool_size Locked	Ariden Lei 5 Aug 2021	Ken Task 5 Aug 2021	1
	core files Locked	edwin c 30 Apr 2004	edwin c 1 May 2004	2
	Coral CDN for distributing the loading of video files? Locked	Jean Jones Grey 2 Oct 2014	Usman Asar 2 Oct 2014	5
	Copying Production Moodledata to Dev Brought Down Production. Locked	Jeff White 15 Jan 2016	Jeff White 7 Mar 2016	7
	Convert innoDB back to MyISAM Locked	HJWUCGA INC. 29 Mar 2010	HJWUCGA INC. 11 May 2010	16
	Contradictory doc on cron jobs for web cluster Locked	Job Céspedes Ortiz 26 May 2015	Howard Miller 26 May 2015	1
	Content Pre-positioning Locked	todd vainisi 20 Apr 2011	todd vainisi 21 Apr 2011	2
	Content Compression Locked	Lei Zhang 27 Aug 2008	Visvanath Ratnaweera 28 Aug 2008	2
	Connection timed out Locked	tony deprato 5 Apr 2008	Norbert Berger 5 Apr 2008	1
	Connection spikes Locked	Ricardo Caiado 12 Nov 2020	Ken Task 12 Nov 2020	3
	Connection limit reached? Locked	Jason Edwards 16 Nov 2009	Ashley Holman 20 Nov 2009	1
	Connection drop issues Locked	Nathan Bruley 26 July 2014	Nathan Bruley 6 Aug 2014	7
	Connection Close versus Keep_Alive? Locked	Sarah King 4 Apr 2004	Sarah King 4 Apr 2004	0
	Connection between database and web servers Locked	Guy Baxter 20 Nov 2009	Visvanath Ratnaweera 22 Nov 2009	2
	Connecting to the MySQL Database using ODBC Locked	Mark Little 6 Oct 2004	Charles Libby 26 Oct 2004	1
	Connecting to Read Only Stand-by Database - Performance	Eugene Tasic 24 Jan 2024	Eugene Tasic 24 Jan 2024	0
	Connecting moodle to a remote SQLServer database Locked	Mahomed Ouedraogo 10 Sept 2020	Leon Stringer 16 Sept 2020	3
	Connecting different servers Locked	Abhinav arya 23 Jan 2007	Visvanath Ratnaweera 25 Jan 2007	1
	Conflict between mod_perl and zlib causes instability. Locked	Steve Edwards 9 Dec 2003	rich t 16 Dec 2003	2
	Configuring Server for 9000 users Locked	Luca Viggiani 6 Apr 2017	Howard Miller 7 Apr 2017	3
	configuring redis and APCu Locked	stefan weber 18 Apr 2019	Luis de Vasconcelos 22 May 2019	3
	Configuring PHP-FPM for performance Locked	Heiko Schach 15 May 2017	Corey Brett 26 June 2017	5
	Configuring Moodle with Apache2 load balancer Locked	Dhastha Gheer 2 Nov 2012	Matteo Scaramuccia 3 Nov 2012	3
	Configuration for 200 simultaneous quizz users ? Locked	Équipe TICEA 17 Nov 2005	Équipe TICEA 29 Nov 2005	4
	Config.php and various subnets Locked	Jose Mª alconchel 6 Apr 2005	Jose Mª alconchel 6 Apr 2005	0
	Config Memcached Locked	Dennis V 14 Dec 2019	Thorsten Bartel 9 Jan 2020	15
	Conducting Quiz for 500 users at the same time in Moodle Locked	Meganathan Ramasamy 8 Dec 2009	Tim Hunt 10 Dec 2009	4
	Conducting quiz for 2000 users Locked	manoj joseph 2 June 2020	manoj joseph 2 Aug 2020	23
	Concurrent Users Locked	Udit Sawhney 10 Mar 2009	Gary Anderson 15 Mar 2009	3
	Concurrent Users Locked	Mark Berthelemy 7 May 2003	Robert Brenstein 12 Mar 2009	20
	Concurrent user testing tools or methodology Locked	HJWUCGA INC. 4 Sept 2009	HJWUCGA INC. 4 Sept 2009	0
	Concurrent user policy Locked	rahul borate 20 Jan 2016	Usman Asar 20 Jan 2016	5
	Complain about netmondo Locked	Pio Garcia 24 June 2004	Art Lader 25 Mar 2005	62
	Comparison of Three Inexpensive Website Hosts Locked	Erlyn Baack 22 Nov 2004	Erlyn Baack 25 Nov 2004	6
	Comparing one server for all versus two server instalation Locked	Ângelo Rigo 14 Oct 2011	Ângelo Rigo 14 Oct 2011	2
	Communication time between modules and time of execution Locked	Artur Zacniewski 28 July 2010	Dale Davies 30 July 2010	4
	Communication error Locked	Salim Al Waili 16 May 2020	Visvanath Ratnaweera 19 May 2020	3
	Comments on planned server hardware Locked	Jerico Tolentino 25 Jan 2008	Alex DePena 6 Feb 2008	16
	Clustering with no shared cache Locked	Luis Romero 26 Apr 2020	Luis Romero 1 May 2020	5
	Clustering test Locked	Lawrence N 24 June 2012	Visvanath Ratnaweera 1 Aug 2012	1
	Clustered Moodle, bad performance with NFS and redis Locked	Pavel Šipoš 18 Mar 2020	Alain Raap 8 May 2020	33
	Clustered Memcached Kubernetes Deployment with McRouter Locked	Mark Oxley 22 Oct 2019	Dan Marsden 25 Oct 2019	18
	Clustered file system for Moodledata Locked	Jeff White 21 June 2017	Jeff White 21 June 2017	0
	Cluster setup Help Locked	Simon Powell 22 Mar 2019	Visvanath Ratnaweera 29 Mar 2019	19
	Cluster design for 15,000 concurrent users in Moodle Locked	Talhah Khan 5 Aug 2020	Amir Fouladvand 12 May 2021	14
	CloudFlare setup with Moodle Locked	Cathal O'Riordan 7 Aug 2015	curt bixel 7 Oct 2015	19
	Cloudflare configuration on Moodle.org Locked	Cathal O'Riordan 19 Nov 2015	Matt Spurrier 24 Nov 2015	8
	CloudFlare Locked	James Brown 20 May 2014	Usman Asar 9 July 2014	9
	Cloud specifications that can support multiple access Locked	t k 30 Sept 2022	t k 1 Nov 2022	4
	Cloud Sites (Hosting) with Rackspace? Locked	William Tan 14 Dec 2009	William Tan 14 Dec 2009	0
	Cloud hosting for Moodle: Options and pros/cons Locked	Shail Chopra 21 Feb 2012	Ruvi Wijesuriya 11 Sept 2015	8
	clone moodle installation Locked	Ruban Jayathas 26 Feb 2008	Visvanath Ratnaweera 29 Feb 2008	2
	Cleaning Up Moodle Data Locked	Dion Baker 28 May 2009	Dion Baker 9 June 2009	6
	Cleaning up Disk Usage MDL-71909	Jon-Erik Lido 12 Mar 2024	Ken Task 13 Mar 2024	9
	clarification on browsing/concurrent users Locked	Melissa Benson 21 Jan 2010	Bob Hoagland 26 Jan 2010	3
	ClamAV on Centos7 Locked	Web HEP 1 July 2015	Web HEP 18 Aug 2015	8
	ClamAV - TCP Socket - Large files - Remote Host Locked	Jeff White 15 Aug 2020	Jeff White 15 Aug 2020	0
	Chrome Device issues (v2.4.0) Locked	Constance Horne 15 July 2015	Constance Horne 15 July 2015	1
	choosing operating system for large installations Locked	Obidjon Yuldashev 18 Mar 2009	Robert Brenstein 18 Mar 2009	2
	Choosing a digitalocean server for moodle 3.9 (1000 students) Locked	Vito Corleone 27 Aug 2020	Marcus Green 13 Apr 2021	25
	Cherokee Experience Locked	Manish Verma 6 Mar 2011	Troo Don 16 Mar 2011	3