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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 3216 discussions
Status	Discussion	Started by	Last post	Replies	Actions
	Moodle scalability Locked	Thinh Dang 15 June 2019	Ray Hinton 20 June 2019	3
	Moodle server on android smartphone Locked	Thierry Coilhac 14 Jan 2022	Visvanath Ratnaweera 9 Feb 2022	3
	VPS Configuration Locked	Thiago Nunes 7 Oct 2016	Howard Miller 7 Oct 2016	2
	Moodle slow when logging in and navigating to home. Locked	Theunis Victor 20 Sept 2017	Ken Task 22 Sept 2017	5
	3000 concurrent users in a course Locked	Theocharis Livieratos 20 Apr 2018	Howard Miller 20 Apr 2018	5
	Scaleablity of Moodle Locked	Theo Stone 25 Jan 2004	Vipen Mahajan 21 June 2008	14
	Moodle in cluster Locked	The Sien 17 Dec 2021	Usman Asar 12 Jan 2022	11
	Error Log - Shared Server Resources? Locked	The Web Side 30 June 2020	The Web Side 13 Aug 2020	9
	Moodle on Shared Hosting Issue Locked	Terry Waterman 28 Apr 2022	Justin Hunt 28 May 2022	11
	Moodle disconnects during chat Locked	Teresa Fryer 12 Feb 2016	Visvanath Ratnaweera 13 Feb 2016	2
	To host or not to host a moodle site Locked	Teresa Fryer 11 Feb 2016	Visvanath Ratnaweera 28 July 2016	24
	Disk partitioning on Moodle server Locked	Teemu Koistinen 26 Apr 2006	Visvanath Ratnaweera 30 Apr 2006	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
	System Requirements: Moodle for 100000+ Students and 10000 simultaneous users Locked	Ted Celestin 10 Feb 2012	Pavel Gonzalez Garcia 6 Apr 2012	5
	Problem zipping & unzipping on the server Locked	Ted Max 25 June 2010	Ted Max 26 June 2010	3
	Sessions in Database problem with Adodb Locked	Taylor Judd 17 Sept 2008	Wen Hao Chuang 25 Mar 2009	19
	XML page can not be displayed. Locked	Tawfiqul Bari 11 Feb 2009	Tim Hunt 12 Feb 2009	7
	moodle architecture esp with multitier installation - Moodle Folder Locked	Tawfik Daim 23 Oct 2017	Michael Penney 24 Nov 2017	7
	Hawdare scaleability for moodle on LAMP Locked	Tawfik Daim 6 Oct 2017	Howard Miller 10 Oct 2017	1
	my platform works very slow Locked	tasos dimopoulos 13 July 2016	Howard Miller 14 July 2016	3
	Slow queries when showing results Locked	Tarjei Huse 12 Apr 2010	Miki Alliel 12 Dec 2011	2
	Using Moodle through NAT Locked	Tariq Nabi 22 June 2005	Martin Dyer 4 July 2006	5
	Web Hosting Locked	Tareque Chowdhury 7 Apr 2005	c miller 9 Apr 2005	2
	Server Configuration Locked	Tarek Raslan 8 Jan 2016	Usman Asar 8 Jan 2016	2
	Login Problem with 30 students Locked	Tan Teck Hock 19 Apr 2007	Visvanath Ratnaweera 19 Apr 2007	1
	Splitting out to have the database in its own server Locked	Tammy Moore 2 Sept 2016	Howard Miller 18 Sept 2016	8
	Moodle Version 2.3.3+ Running on Windows 8 Server Locked	Tammy Brice 9 Feb 2013	Mari Cruz García 11 Feb 2013	1
	Slowdown after 1.9 -> 2.2 migration Locked	Tamas Csillag 20 Sept 2012	Tamas Csillag 21 Sept 2012	2
	Just Learning about Moodle Locked	Tamara Peffer 22 June 2005	Bill Burgos 22 June 2005	1
	Cluster design for 15,000 concurrent users in Moodle Locked	Talhah Khan 5 Aug 2020	Amir Fouladvand 12 May 2021	14
	Moodle and pgpool Locked	Tak Auyeung 24 Mar 2008	Penny Leach 17 July 2008	7
	Moodle file picker not working Locked	Taj Des 30 Mar 2017	Landy DeField 16 Dec 2021	45
	Slow Moodle Performance with Upgrades to 2.1.1 Locked	Tadge O'Brien 18 Oct 2011	Visvanath Ratnaweera 30 Oct 2011	9
	More Performance Changing block_online_users.php Locked	Tadeu do Carmo Alves 11 Aug 2009	Tadeu do Carmo Alves 12 Aug 2009	2
	Tunning moodle+apache+mysql+php RHEL 5 Locked	Tadeu do Carmo Alves 9 Mar 2009	Tadeu do Carmo Alves 24 Mar 2009	15
	Moodle is hanging every day. Error: Database connection failed Locked	Tadas Gečas 11 Dec 2020	Tadas Gečas 15 Dec 2020	5
	Redhat or SUSE? 32 bit or 64 bit? Locked	Tabitha Parker (was Roder) 16 Aug 2012	Visvanath Ratnaweera 11 Oct 2012	6
	no access from inside network Locked	T.C. Chappelear 27 Sept 2006	Visvanath Ratnaweera 27 Sept 2006	2
	New to Moodle - Kind of Lost Locked	T.C. Chappelear 4 Aug 2006	Richie Foreman 6 Aug 2006	3
	Cloud specifications that can support multiple access Locked	t k 30 Sept 2022	t k 1 Nov 2022	4
	Poor performance and connection timeouts (Media Temple) Locked	T Strait 12 July 2010	George Dickens 13 July 2010	3
	Cannot use .PHP extensions Locked	T H 17 Apr 2005	Chris Valentine 22 Nov 2005	2
	Moodle 2.7 is very slow Locked	system vim 3 Feb 2015	Visvanath Ratnaweera 3 Feb 2015	1
	Load testing - quiz Locked	Syed Ali 1 Dec 2016	Howard Miller 1 Dec 2016	1
	course Locked	swati c 24 Dec 2009	James Jameson 30 Dec 2009	1
	List of instances where database is accessed Locked	Swapnil Thakre 28 Dec 2008	Swapnil Thakre 29 Dec 2008	2
	Hardware recommendation Locked	Svenja Lell 6 Nov 2020	Svenja Lell 6 Nov 2020	0
	Moodle and postgres Locked	Sven Laudel 14 Apr 2020	Ricardo Caiado 28 June 2020	2
	Moodle cluster and temp dirs Locked	Sven Laudel 13 Apr 2020	Jörg S. 3 July 2020	3
	Moodle cluster setup and sessions Locked	Sven Laudel 20 Mar 2020	ADISAK CHAIKAEW 26 June 2020	16
	How many students can the system handle? Locked	Sven Cederberg 17 Nov 2004	Martín Langhoff 19 Nov 2004	3
	Deployment Question Locked	Suzanne Bogovich 5 Oct 2010	Visvanath Ratnaweera 6 Oct 2010	3
	Moodle for a school with around 3000 students Locked	sushumna rao 15 June 2016	Howard Miller 20 June 2016	6
	Performance issue on mod assign grading using separate groups Locked	Susana L. 4 Nov 2021	Susana L. 5 Nov 2021	2
	25000 users cohort sync Locked	Susana L. 3 Feb 2016	Mark Sharp 3 Feb 2016	1
	Moodle freeze Locked	Susana L. 13 Jan 2016	Susana L. 25 Jan 2016	5
	Online users block - performance Locked	Susana L. 7 July 2010	Susana L. 8 July 2010	2
	Quizzes : performance on exams period Locked	Susana L. 12 May 2010	Susana L. 16 Dec 2010	39
	Your opinion about this server configuration / 200 or 300 users Locked	Susana Willemoës 10 May 2006	Visvanath Ratnaweera 14 May 2006	2
	memcached session lock errors Locked	Susan Mangan 22 Aug 2020	Thorsten Bartel 11 Sept 2020	2
	Question re using linux TOP and associating PID with process/task Locked	Susan Mangan 5 Oct 2013	Susan Mangan 10 Oct 2013	5
	2.4.5+ (Build: 20130712) - intermittent performance issues Locked	Susan Mangan 5 Sept 2013	Samuel Witzig 17 Sept 2013	10
	2.4.3 Performance issues - session locks Locked	Susan Mangan 4 May 2013	Susan Mangan 10 May 2013	20
	moodledata on separate server? Locked	Susan Mangan 16 Oct 2010	sam marshall 18 Oct 2010	4
	Moodle Slow Queries as per AWS Locked	Surinder Rawat 9 Sept 2020	Surinder Rawat 10 Sept 2020	2
	How much server space and bandwidth do I need for 400 students on Moodle? Locked	Sunyee W 15 Dec 2004	Michael Penney 16 Dec 2004	3
	Moodle Site 3.8.1 is running too slow.	Sunny Adhatrao 8 May 2023	Ken Task 8 May 2023	4
	Moodle application takes too much time to load. Locked	Sunny Adhatrao 18 Aug 2022	Howard Miller 20 Aug 2022	3
	Moodle Using High Physical Memory Usage Locked	Sultan Mehmood 13 May 2020	Visvanath Ratnaweera 14 May 2020	4
	Moodle Best Settings Locked	Sulaiman Hana Permana 23 Nov 2010	Visvanath Ratnaweera 19 Mar 2011	1
	Server for Moodle and Mahara Locked	Sulaiman Hana Permana 25 Aug 2010	Visvanath Ratnaweera 25 Aug 2010	1
	University of Victoria BC, Canada to Etheopia - issues/problems? Locked	Sue Harper 5 Oct 2008	Ken Wilson 8 Oct 2008	2
	Moodle benchmark test Locked	Sue Sottili 29 June 2004	sulochana sooriyaarachchi 3 Feb 2009	9
	SCORM 1.2 loading slowly on Moodle 2.7 on iPad, on justHost server Locked	Subramani K 22 May 2014	Usman Asar 22 May 2014	7
	Quiz / Server Crash Locked	Subrahmanyam V V 11 July 2020	Visvanath Ratnaweera 15 July 2020	6
	Redis - key prefix length	Stuart Anderson 10 Nov 2023	Stuart Anderson 10 Nov 2023	0
	Unexplained proxy_fcgi:error messages in server logs Locked	Stuart Anderson 11 Mar 2022	Stuart Anderson 15 Aug 2022	6
	Email problem? System slow to create users or complete tests Locked	Stuart Ridout 19 June 2017	Jamie Kramer 21 June 2017	1
	Really slow logon Locked	Stuart Hector 11 Mar 2015	Howard Miller 15 Mar 2015	7
	Server and database choices Locked	Stuart Mayor 6 July 2005	Marcus Green 7 July 2005	1
	Moodle 2.6 cluster + NFS v4 Locked	sTIC ASIC Team A 18 Feb 2014	Matteo Scaramuccia 19 Feb 2014	4
	uploaduser.php performance - can it be improved? Locked	Stewart Hutton 14 Nov 2010	Stewart Hutton 14 Nov 2010	0
	Automated backups: performance issue? Locked	Steven Pitteman 23 Sept 2020	Ken Task 24 Sept 2020	5
	Rebuilding The Moodle Database Question Locked	Steven P. 26 Jan 2016	Howard Miller 27 Jan 2016	2
	deleting archived courses from moodledata Locked	Steven Silvern 14 July 2015	Steven Silvern 16 July 2015	11
	Images missing after mod_gzip implimentation Locked	Steven O'Donnell 24 Feb 2009	Steven O'Donnell 25 Feb 2009	3
	Need a good MySQL / Moodle consultant Locked	Steven Geggie 19 July 2006	Thomas Haynes 20 July 2006	3
	MySQL error Locked	Steven Geggie 19 July 2006	Ken Wilson 23 July 2006	1
	Database issues Locked	Steven Geggie 15 July 2006	Steven Geggie 15 July 2006	1
	How to limit CPU usage on server? Locked	Steven Day 12 Nov 2004	Visvanath Ratnaweera 3 Dec 2007	9
	Possible to run Moodle on older Mac G4/400? Locked	Steven Day 10 Nov 2004	Ted O'Neill 30 Nov 2004	12
	What is mysql abuse? My account was just suspended. Locked	Steven Day 10 Nov 2004	Steven Day 10 Nov 2004	6
	Flash Filer SQL Locked	Steven Priefer 27 Aug 2004	Steven Priefer 8 Sept 2004	3
	TCH, Surpass hosting and Moodle Locked	Steven Day 7 June 2004	Steven Day 24 Sept 2004	9
	Run Moodle locally for presentation and testing? Locked	Steven Day 30 Mar 2004	W Page 21 Apr 2004	8
	Shell access to remote server? Locked	Steven Day 30 Mar 2004	Steven Day 30 Mar 2004	3
	Hosting question Locked	Steven Day 19 Mar 2004	Steven Day 19 Mar 2004	2
	How many simultaneous users? Locked	Steven Smith 27 June 2003	Ger Tielemans 27 June 2003	16
	Too many files problem Locked	Steve Massicotte 20 June 2019	Steve Massicotte 27 June 2019	11
	Timing Out Locked	Steve Hyland 11 Aug 2018	Rick Jerz 13 Aug 2018	12