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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
	Conflict between mod_perl and zlib causes instability. Locked	Steve Edwards 9 Dec 2003	rich t 16 Dec 2003	2
	Server Loads Locked	Steve Edwards 22 Jan 2004	Sean McKay 24 July 2004	16
	Host Moodle at 1 and 1 .com Locked	Steve Chorny 14 July 2004	W Page 14 July 2004	3
	Moodle Hosting Sites Locked	Steve Wu 14 Mar 2006	Claude Whitmyer 14 Dec 2010	19
	Upgrading MySql -- What are my chances for problems? Locked	Steve Hyndman 31 May 2006	Steve Hyndman 31 May 2006	4
	CSS not being found on external access Locked	Steve Blakemore 9 Jan 2008	Paul Holden 22 Jan 2008	1
	Moodle running in virtual server environment? Locked	Steve Reed 9 Feb 2008	Greg Hayden 11 Feb 2008	5
	Hardware & Software to run Moodle Locked	Steve Hill 13 May 2008	Steve Hill 17 May 2008	5
	Worried about the performance of our moodle server ! Locked	Steve Audus 7 June 2008	Steve Audus 9 June 2008	3
	Worried about the performance of our moodle server ! Continued... Locked	Steve Audus 18 June 2008	Myles Carrick 21 July 2008	2
	porting Linux Moodle to Windows Moodle Locked	Steve Peters 19 July 2008	Ken Wilson 3 Aug 2008	10
	Which Linux? Locked	Steve Squires 13 May 2010	Mary Evans 7 June 2010	22
	Server Requirements for large Moodle Deployment up to 40k users with500 concurrent scalable to ... Locked	Steve Beitzell 27 Aug 2010	Visvanath Ratnaweera 31 Aug 2010	3
	Move database to new server (?SAN?) Locked	steve farrow 12 Aug 2011	steve farrow 12 Aug 2011	0
	Debugging Debug report.... Locked	Steve Ambro v3.8 11 July 2016	Steve Ambro v3.8 11 July 2016	2
	Moodle on AWS load balancing Architecture Locked	Steve Pollock 19 Apr 2017	Tawfik Daim 21 Oct 2017	14
	Timing Out Locked	Steve Hyland 11 Aug 2018	Rick Jerz 13 Aug 2018	12
	Too many files problem Locked	Steve Massicotte 20 June 2019	Steve Massicotte 27 June 2019	11
	How many simultaneous users? Locked	Steven Smith 27 June 2003	Ger Tielemans 27 June 2003	16
	Hosting question Locked	Steven Day 19 Mar 2004	Steven Day 19 Mar 2004	2
	Shell access to remote server? Locked	Steven Day 30 Mar 2004	Steven Day 30 Mar 2004	3
	Run Moodle locally for presentation and testing? Locked	Steven Day 30 Mar 2004	W Page 21 Apr 2004	8
	TCH, Surpass hosting and Moodle Locked	Steven Day 7 June 2004	Steven Day 24 Sept 2004	9
	Flash Filer SQL Locked	Steven Priefer 27 Aug 2004	Steven Priefer 8 Sept 2004	3
	What is mysql abuse? My account was just suspended. Locked	Steven Day 10 Nov 2004	Steven Day 10 Nov 2004	6
	Possible to run Moodle on older Mac G4/400? Locked	Steven Day 10 Nov 2004	Ted O'Neill 30 Nov 2004	12
	How to limit CPU usage on server? Locked	Steven Day 12 Nov 2004	Visvanath Ratnaweera 3 Dec 2007	9
	Database issues Locked	Steven Geggie 15 July 2006	Steven Geggie 15 July 2006	1
	MySQL error Locked	Steven Geggie 19 July 2006	Ken Wilson 23 July 2006	1
	Need a good MySQL / Moodle consultant Locked	Steven Geggie 19 July 2006	Thomas Haynes 20 July 2006	3
	Images missing after mod_gzip implimentation Locked	Steven O'Donnell 24 Feb 2009	Steven O'Donnell 25 Feb 2009	3
	deleting archived courses from moodledata Locked	Steven Silvern 14 July 2015	Steven Silvern 16 July 2015	11
	Rebuilding The Moodle Database Question Locked	Steven P. 26 Jan 2016	Howard Miller 27 Jan 2016	2
	Automated backups: performance issue? Locked	Steven Pitteman 23 Sept 2020	Ken Task 24 Sept 2020	5
	uploaduser.php performance - can it be improved? Locked	Stewart Hutton 14 Nov 2010	Stewart Hutton 14 Nov 2010	0
	Moodle 2.6 cluster + NFS v4 Locked	sTIC ASIC Team A 18 Feb 2014	Matteo Scaramuccia 19 Feb 2014	4
	Server and database choices Locked	Stuart Mayor 6 July 2005	Marcus Green 7 July 2005	1
	Really slow logon Locked	Stuart Hector 11 Mar 2015	Howard Miller 15 Mar 2015	7
	Email problem? System slow to create users or complete tests Locked	Stuart Ridout 19 June 2017	Jamie Kramer 21 June 2017	1
	Unexplained proxy_fcgi:error messages in server logs Locked	Stuart Anderson 11 Mar 2022	Stuart Anderson 15 Aug 2022	6
	Redis - key prefix length	Stuart Anderson 10 Nov 2023	Stuart Anderson 10 Nov 2023	0
	Quiz / Server Crash Locked	Subrahmanyam V V 11 July 2020	Visvanath Ratnaweera 15 July 2020	6
	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
	Moodle benchmark test Locked	Sue Sottili 29 June 2004	sulochana sooriyaarachchi 3 Feb 2009	9
	University of Victoria BC, Canada to Etheopia - issues/problems? Locked	Sue Harper 5 Oct 2008	Ken Wilson 8 Oct 2008	2
	Server for Moodle and Mahara Locked	Sulaiman Hana Permana 25 Aug 2010	Visvanath Ratnaweera 25 Aug 2010	1
	Moodle Best Settings Locked	Sulaiman Hana Permana 23 Nov 2010	Visvanath Ratnaweera 19 Mar 2011	1
	Moodle Using High Physical Memory Usage Locked	Sultan Mehmood 13 May 2020	Visvanath Ratnaweera 14 May 2020	4
	Moodle application takes too much time to load. Locked	Sunny Adhatrao 18 Aug 2022	Howard Miller 20 Aug 2022	3
	Moodle Site 3.8.1 is running too slow.	Sunny Adhatrao 8 May 2023	Ken Task 8 May 2023	4
	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 Slow Queries as per AWS Locked	Surinder Rawat 9 Sept 2020	Surinder Rawat 10 Sept 2020	2
	moodledata on separate server? Locked	Susan Mangan 16 Oct 2010	sam marshall 18 Oct 2010	4
	2.4.3 Performance issues - session locks Locked	Susan Mangan 4 May 2013	Susan Mangan 10 May 2013	20
	2.4.5+ (Build: 20130712) - intermittent performance issues Locked	Susan Mangan 5 Sept 2013	Samuel Witzig 17 Sept 2013	10
	Question re using linux TOP and associating PID with process/task Locked	Susan Mangan 5 Oct 2013	Susan Mangan 10 Oct 2013	5
	memcached session lock errors Locked	Susan Mangan 22 Aug 2020	Thorsten Bartel 11 Sept 2020	2
	Your opinion about this server configuration / 200 or 300 users Locked	Susana Willemoës 10 May 2006	Visvanath Ratnaweera 14 May 2006	2
	Quizzes : performance on exams period Locked	Susana L. 12 May 2010	Susana L. 16 Dec 2010	39
	Online users block - performance Locked	Susana L. 7 July 2010	Susana L. 8 July 2010	2
	Moodle freeze Locked	Susana L. 13 Jan 2016	Susana L. 25 Jan 2016	5
	25000 users cohort sync Locked	Susana L. 3 Feb 2016	Mark Sharp 3 Feb 2016	1
	Performance issue on mod assign grading using separate groups Locked	Susana L. 4 Nov 2021	Susana L. 5 Nov 2021	2
	Moodle for a school with around 3000 students Locked	sushumna rao 15 June 2016	Howard Miller 20 June 2016	6
	Deployment Question Locked	Suzanne Bogovich 5 Oct 2010	Visvanath Ratnaweera 6 Oct 2010	3
	How many students can the system handle? Locked	Sven Cederberg 17 Nov 2004	Martín Langhoff 19 Nov 2004	3
	Moodle cluster setup and sessions Locked	Sven Laudel 20 Mar 2020	ADISAK CHAIKAEW 26 June 2020	16
	Moodle cluster and temp dirs Locked	Sven Laudel 13 Apr 2020	Jörg S. 3 July 2020	3
	Moodle and postgres Locked	Sven Laudel 14 Apr 2020	Ricardo Caiado 28 June 2020	2
	Hardware recommendation Locked	Svenja Lell 6 Nov 2020	Svenja Lell 6 Nov 2020	0
	List of instances where database is accessed Locked	Swapnil Thakre 28 Dec 2008	Swapnil Thakre 29 Dec 2008	2
	course Locked	swati c 24 Dec 2009	James Jameson 30 Dec 2009	1
	Load testing - quiz Locked	Syed Ali 1 Dec 2016	Howard Miller 1 Dec 2016	1
	Moodle 2.7 is very slow Locked	system vim 3 Feb 2015	Visvanath Ratnaweera 3 Feb 2015	1
	Cannot use .PHP extensions Locked	T H 17 Apr 2005	Chris Valentine 22 Nov 2005	2
	Poor performance and connection timeouts (Media Temple) Locked	T Strait 12 July 2010	George Dickens 13 July 2010	3
	Cloud specifications that can support multiple access Locked	t k 30 Sept 2022	t k 1 Nov 2022	4
	New to Moodle - Kind of Lost Locked	T.C. Chappelear 4 Aug 2006	Richie Foreman 6 Aug 2006	3
	no access from inside network Locked	T.C. Chappelear 27 Sept 2006	Visvanath Ratnaweera 27 Sept 2006	2
	Redhat or SUSE? 32 bit or 64 bit? Locked	Tabitha Parker (was Roder) 16 Aug 2012	Visvanath Ratnaweera 11 Oct 2012	6
	Moodle is hanging every day. Error: Database connection failed Locked	Tadas Gečas 11 Dec 2020	Tadas Gečas 15 Dec 2020	5
	Tunning moodle+apache+mysql+php RHEL 5 Locked	Tadeu do Carmo Alves 9 Mar 2009	Tadeu do Carmo Alves 24 Mar 2009	15
	More Performance Changing block_online_users.php Locked	Tadeu do Carmo Alves 11 Aug 2009	Tadeu do Carmo Alves 12 Aug 2009	2
	Slow Moodle Performance with Upgrades to 2.1.1 Locked	Tadge O'Brien 18 Oct 2011	Visvanath Ratnaweera 30 Oct 2011	9
	Moodle file picker not working Locked	Taj Des 30 Mar 2017	Landy DeField 16 Dec 2021	45
	Moodle and pgpool Locked	Tak Auyeung 24 Mar 2008	Penny Leach 17 July 2008	7
	Cluster design for 15,000 concurrent users in Moodle Locked	Talhah Khan 5 Aug 2020	Amir Fouladvand 12 May 2021	14
	Just Learning about Moodle Locked	Tamara Peffer 22 June 2005	Bill Burgos 22 June 2005	1
	Slowdown after 1.9 -> 2.2 migration Locked	Tamas Csillag 20 Sept 2012	Tamas Csillag 21 Sept 2012	2
	Moodle Version 2.3.3+ Running on Windows 8 Server Locked	Tammy Brice 9 Feb 2013	Mari Cruz García 11 Feb 2013	1
	Splitting out to have the database in its own server Locked	Tammy Moore 2 Sept 2016	Howard Miller 18 Sept 2016	8
	Login Problem with 30 students Locked	Tan Teck Hock 19 Apr 2007	Visvanath Ratnaweera 19 Apr 2007	1
	Server Configuration Locked	Tarek Raslan 8 Jan 2016	Usman Asar 8 Jan 2016	2
	Web Hosting Locked	Tareque Chowdhury 7 Apr 2005	c miller 9 Apr 2005	2
	Using Moodle through NAT Locked	Tariq Nabi 22 June 2005	Martin Dyer 4 July 2006	5
	Slow queries when showing results Locked	Tarjei Huse 12 Apr 2010	Miki Alliel 12 Dec 2011	2
	my platform works very slow Locked	tasos dimopoulos 13 July 2016	Howard Miller 14 July 2016	3
	Hawdare scaleability for moodle on LAMP Locked	Tawfik Daim 6 Oct 2017	Howard Miller 10 Oct 2017	1
	moodle architecture esp with multitier installation - Moodle Folder Locked	Tawfik Daim 23 Oct 2017	Michael Penney 24 Nov 2017	7
	XML page can not be displayed. Locked	Tawfiqul Bari 11 Feb 2009	Tim Hunt 12 Feb 2009	7