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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 3215 discussions
Status	Discussion	Started by	Last post	Replies	Actions
	CGI Timeout Errors - Performance Issue? Locked	Kam Vento 20 Nov 2003	Kam Vento 22 Nov 2003	8
	Change filedir folder. Locked	Oh ByeongJoo 14 Apr 2015	Oh ByeongJoo 14 Apr 2015	0
	Change Limit Size Upload File in iBook G4 Locked	Biamin Ahmad 13 Nov 2005	Chris Valentine 22 Nov 2005	2
	Change of Server and Domain: Problems and Script Error Locked	Michael Hicke 28 Jan 2005	Michael Hicke 28 Jan 2005	2
	changing domain name Locked	Diana Clarke 20 Oct 2004	Dave Ray 21 Oct 2004	1
	Changing Hosting Locked	Rafa Chávez Ortega 9 Aug 2006	Randy Obert 9 Aug 2006	3
	Changing IP to domain name Locked	Ken Tuley 9 Dec 2005	John Dourish 11 Dec 2005	3
	Changing Moodle Data location = Very slooow site - 5+ minutes per page load Locked	J L 19 Jan 2018	Chris Fryer 20 Jan 2018	1
	Changing Server Hardware Locked	M Y 13 May 2006	Iñaki Arenaza 24 May 2006	1
	Changing session.save_path Locked	m M 21 Aug 2013	Peter Kehl 16 Sep 2014	2
	character encoding pound signs Locked	dan attwood 25 Sep 2013	Guillermo Madero 27 Sep 2013	4
	Chat - Server requirements Locked	Jeison Oliveira 31 Mar 2009	Jeison Oliveira 31 Mar 2009	0
	Chat is too slow Locked	Romain D. 24 Feb 2007	Bill Michaelson 11 Mar 2007	5
	Chat presence indicator Locked	Philippe Scott 9 Sep 2006	Dan Stowell 11 Sep 2006	1
	Cheap hosting for Moodle? Locked	Juan Jose de la Mora 15 Jun 2004	Michael Penney 22 Sep 2007	30
	Cherokee + PHP + Moodle Locked	Goran Mekic 25 Mar 2006	Benoit Brosseau 4 Apr 2006	1
	Cherokee Experience Locked	Manish Verma 6 Mar 2011	Troo Don 16 Mar 2011	3
	Choosing a digitalocean server for moodle 3.9 (1000 students) Locked	Vito Corleone 27 Aug 2020	Marcus Green 13 Apr 2021	25
	choosing operating system for large installations Locked	Obidjon Yuldashev 18 Mar 2009	Robert Brenstein 18 Mar 2009	2
	Chrome Device issues (v2.4.0) Locked	Constance Horne 15 Jul 2015	Constance Horne 15 Jul 2015	1
	ClamAV - TCP Socket - Large files - Remote Host Locked	Jeff White 15 Aug 2020	Jeff White 15 Aug 2020	0
	ClamAV on Centos7 Locked	Web HEP 1 Jul 2015	Web HEP 18 Aug 2015	8
	clarification on browsing/concurrent users Locked	Melissa Benson 21 Jan 2010	Bob Hoagland 26 Jan 2010	3
	Cleaning up Disk Usage MDL-71909	Jon-Erik Lido 12 Mar 2024	Ken Task 13 Mar 2024	9
	Cleaning Up Moodle Data Locked	Dion Baker 28 May 2009	Dion Baker 9 Jun 2009	6
	clone moodle installation Locked	Ruban Jayathas 26 Feb 2008	Visvanath Ratnaweera 29 Feb 2008	2
	Cloud hosting for Moodle: Options and pros/cons Locked	Shail Chopra 21 Feb 2012	Ruvi Wijesuriya 11 Sep 2015	8
	Cloud Sites (Hosting) with Rackspace? Locked	William Tan 14 Dec 2009	William Tan 14 Dec 2009	0
	Cloud specifications that can support multiple access Locked	t k 30 Sep 2022	t k 1 Nov 2022	4
	CloudFlare Locked	James Brown 20 May 2014	Usman Asar 9 Jul 2014	9
	Cloudflare configuration on Moodle.org Locked	Cathal O'Riordan 19 Nov 2015	Matt Spurrier 24 Nov 2015	8
	CloudFlare setup with Moodle Locked	Cathal O'Riordan 7 Aug 2015	curt bixel 7 Oct 2015	19
	Cluster design for 15,000 concurrent users in Moodle Locked	Talhah Khan 5 Aug 2020	Amir Fouladvand 12 May 2021	14
	Cluster setup Help Locked	Simon Powell 22 Mar 2019	Visvanath Ratnaweera 29 Mar 2019	19
	Clustered file system for Moodledata Locked	Jeff White 21 Jun 2017	Jeff White 21 Jun 2017	0
	Clustered Memcached Kubernetes Deployment with McRouter Locked	Mark Oxley 22 Oct 2019	Dan Marsden 25 Oct 2019	18
	Clustered Moodle, bad performance with NFS and redis Locked	Pavel Šipoš 18 Mar 2020	Alain Raap 8 May 2020	33
	Clustering test Locked	Lawrence N 24 Jun 2012	Visvanath Ratnaweera 1 Aug 2012	1
	Clustering with no shared cache Locked	Luis Romero 26 Apr 2020	Luis Romero 1 May 2020	5
	Comments on planned server hardware Locked	Jerico Tolentino 25 Jan 2008	Alex DePena 6 Feb 2008	16
	Communication error Locked	Salim Al Waili 16 May 2020	Visvanath Ratnaweera 19 May 2020	3
	Communication time between modules and time of execution Locked	Artur Zacniewski 28 Jul 2010	Dale Davies 30 Jul 2010	4
	Comparing one server for all versus two server instalation Locked	Ângelo Rigo 14 Oct 2011	Ângelo Rigo 14 Oct 2011	2
	Comparison of Three Inexpensive Website Hosts Locked	Erlyn Baack 22 Nov 2004	Erlyn Baack 25 Nov 2004	6
	Complain about netmondo Locked	Pio Garcia 24 Jun 2004	Art Lader 25 Mar 2005	62
	Concurrent user policy Locked	rahul borate 20 Jan 2016	Usman Asar 20 Jan 2016	5
	Concurrent user testing tools or methodology Locked	HJWUCGA INC. 4 Sep 2009	HJWUCGA INC. 4 Sep 2009	0
	Concurrent Users Locked	Mark Berthelemy 7 May 2003	Robert Brenstein 12 Mar 2009	20
	Concurrent Users Locked	Udit Sawhney 10 Mar 2009	Gary Anderson 15 Mar 2009	3
	Conducting quiz for 2000 users Locked	manoj joseph 2 Jun 2020	manoj joseph 2 Aug 2020	23
	Conducting Quiz for 500 users at the same time in Moodle Locked	Meganathan Ramasamy 8 Dec 2009	Tim Hunt 10 Dec 2009	4
	Config Memcached Locked	Dennis V 14 Dec 2019	Thorsten Bartel 9 Jan 2020	15
	Config.php and various subnets Locked	Jose Mª alconchel 6 Apr 2005	Jose Mª alconchel 6 Apr 2005	0
	Configuration for 200 simultaneous quizz users ? Locked	Équipe TICEA 17 Nov 2005	Équipe TICEA 29 Nov 2005	4
	Configuring Moodle with Apache2 load balancer Locked	Dhastha Gheer 2 Nov 2012	Matteo Scaramuccia 3 Nov 2012	3
	Configuring PHP-FPM for performance Locked	Heiko Schach 15 May 2017	Corey Brett 26 Jun 2017	5
	configuring redis and APCu Locked	stefan weber 18 Apr 2019	Luis de Vasconcelos 22 May 2019	3
	Configuring Server for 9000 users Locked	Luca Viggiani 6 Apr 2017	Howard Miller 7 Apr 2017	3
	Conflict between mod_perl and zlib causes instability. Locked	Steve Edwards 9 Dec 2003	rich t 16 Dec 2003	2
	Connecting different servers Locked	Abhinav arya 23 Jan 2007	Visvanath Ratnaweera 25 Jan 2007	1
	Connecting moodle to a remote SQLServer database Locked	Mahomed Ouedraogo 10 Sep 2020	Leon Stringer 16 Sep 2020	3
	Connecting to Read Only Stand-by Database - Performance	Eugene Tasic 24 Jan 2024	Eugene Tasic 24 Jan 2024	0
	Connecting to the MySQL Database using ODBC Locked	Mark Little 6 Oct 2004	Charles Libby 26 Oct 2004	1
	Connection between database and web servers Locked	Guy Baxter 20 Nov 2009	Visvanath Ratnaweera 22 Nov 2009	2
	Connection Close versus Keep_Alive? Locked	Sarah King 4 Apr 2004	Sarah King 4 Apr 2004	0
	Connection drop issues Locked	Nathan Bruley 26 Jul 2014	Nathan Bruley 6 Aug 2014	7
	Connection limit reached? Locked	Jason Edwards 16 Nov 2009	Ashley Holman 20 Nov 2009	1
	Connection spikes Locked	Ricardo Caiado 12 Nov 2020	Ken Task 12 Nov 2020	3
	Connection timed out Locked	tony deprato 5 Apr 2008	Norbert Berger 5 Apr 2008	1
	Content Compression Locked	Lei Zhang 27 Aug 2008	Visvanath Ratnaweera 28 Aug 2008	2
	Content Pre-positioning Locked	todd vainisi 20 Apr 2011	todd vainisi 21 Apr 2011	2
	Contradictory doc on cron jobs for web cluster Locked	Job Céspedes Ortiz 26 May 2015	Howard Miller 26 May 2015	1
	Convert innoDB back to MyISAM Locked	HJWUCGA INC. 29 Mar 2010	HJWUCGA INC. 11 May 2010	16
	Copying Production Moodledata to Dev Brought Down Production. Locked	Jeff White 15 Jan 2016	Jeff White 7 Mar 2016	7
	Coral CDN for distributing the loading of video files? Locked	Jean Jones Grey 2 Oct 2014	Usman Asar 2 Oct 2014	5
	core files Locked	edwin c 30 Apr 2004	edwin c 1 May 2004	2
	Correct value of innodb_buffer_pool_size Locked	Ariden Lei 5 Aug 2021	Ken Task 5 Aug 2021	1
	Cost of Moodle Locked	Deleted user 18 Nov 2009	Visvanath Ratnaweera 22 Nov 2009	9
	Could Moodle support a shared nothing architecture? Locked	Cathal O'Riordan 22 Feb 2012	Cathal O'Riordan 23 Feb 2012	2
	Could not handle 60 requests at a time for online quiz Locked	Santhosh Chandra 10 Jun 2017	Usman Asar 11 Jun 2017	2
	Could not insert record info in database. Locked	Neelima Ramesh 4 Jan 2010	Visvanath Ratnaweera 24 Feb 2010	1
	Could you report number of courses and users of your Moodle site? Locked	David Delgado 4 Mar 2004	Herbert Keijers 7 Mar 2004	10
	Count hits on my MOODLE site Locked	fouzia imran 9 Aug 2006	Heather P 24 Aug 2006	4
	course Locked	swati c 24 Dec 2009	James Jameson 30 Dec 2009	1
	Course Backup, Restoration and Deletion is very slow	Marco Cigna 1 Nov 2023	Marco Cigna 1 Nov 2023	6
	course completion issue Locked	Leena Nikhare 22 Dec 2017	Ken Task 28 Dec 2017	12
	Course disk usage Locked	Sebastián Espinosa 3 Apr 2009	Elvedin Trnjanin 13 Apr 2009	14
	Course Enrol Button Locked	David O'Brien 19 Sep 2006	Ken Wilson 21 Sep 2006	1
	Course Format Impact on Performance Locked	Paul Lindgreen 9 Oct 2015	Visvanath Ratnaweera 9 Oct 2015	1
	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-completion-report Locked	Deleted user 19 Sep 2014	jason white 27 Feb 2015	4
	Course-level backup on large-ish instance Locked	Mark van Hoek 30 Oct 2018	Susan Mangan 1 Nov 2018	2
	Courses for 6000 students Locked	Lorenzzo Mollinar 11 Apr 2017	Usman Asar 11 Apr 2017	1
	CPU Last 100%	André Krauß 5 Jan 2024	Visvanath Ratnaweera 5 Jan 2024	1
	cpu overload Locked	Ray Le Couteur 1 Feb 2003	Huib van Wees 30 Aug 2003	9
	CPU overloaded Locked	Bernat Martinez 3 Jul 2017	Bernat Martinez 6 Jul 2017	6
	CPU Problems Locked	Tiago Fischer 13 Jul 2007	Matt Gibson 31 Oct 2007	8
	CPU QUOTA EXCEEDED: moodle or server problem? Locked	Peter Ruthven-Stuart 19 Oct 2005	Samuel Cochran 19 Oct 2005	1
	cpu reach 100% Locked	Achala Karunarathne 3 Mar 2021	Achala Karunarathne 4 Mar 2021	9
	CPU running at 95%..why!!! Locked	Julian Ridden 14 Jun 2005	John Rodgers 22 Jul 2005	18