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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
	Real database Usage multiple moodle sites Locked	Shimron Trammell 9 Mar 2009	Shimron Trammell 10 Mar 2009	2
	Reading/Writing file performance with Gluster !! Locked	Khaled Atteya 7 Apr 2023	Visvanath Ratnaweera 9 Apr 2023	5
	readfile slow in filelib.php Locked	Patrick Scott 24 Mar 2020	Matteo Scaramuccia 27 Apr 2020	5
	Read/Write splitting of DB operations Locked	Jai Gupta 4 July 2009	Jai Gupta 4 July 2009	0
	Read-Only Moodle, tuning for speed? Locked	David Scotson 8 Apr 2008	David Scotson 8 Apr 2008	0
	Re: NetMondo - Yikes! Locked	Bryan Williams 20 Jan 2004	NetMondo Web Services 20 Jan 2004	1
	Re: moodle system going down/getting stuck very often (II) Locked	Sam McNeill 31 May 2012	Visvanath Ratnaweera 1 June 2012	5
	Re: Hardware requirements to support 1000 simultaneous quiz takers? (2nd case) Locked	Rama Krishnan 28 Feb 2011	Visvanath Ratnaweera 9 Mar 2011	7
	Re: Delivery Status Notification (Failure) Locked	danish haroon 5 Apr 2010	Sean Farrell 7 June 2010	1
	Re: Active participants (split from New to Moodle can it do?) Locked	Usman Asar 28 Mar 2015	Mary Cooch 30 Mar 2015	7
	Random quiz performance problem? Locked	Per Bressendorff 3 Jan 2009	Per Bressendorff 3 Jan 2009	2
	Random Disconnects 3.9.1 Locked	Khader Bandak 15 Aug 2020	James Steerpike 27 Aug 2020	20
	RAM requirements Locked	Alexandre G B 3 Dec 2008	riccardo capecchi 6 Dec 2008	6
	RAM is not freeing up in time	Manoj Singh 18 Dec 2023	Visvanath Ratnaweera 19 Dec 2023	7
	RAM and RAID and concurrent users Locked	J Fernandes 29 Oct 2009	Greg Lund-Chaix 28 Nov 2009	3
	RAID 10 or RAID 5? Locked	Matt Gibson 5 Dec 2007	Matt Gibson 6 Dec 2007	2
	Quizzes Loads Slow - Other functions working fine Locked	Shelly Vaughan 27 Aug 2019	Mei Ling 4 Oct 2019	5
	Quizzes freeze everything up Locked	Troy Garrett 12 Oct 2012	Emma Richardson 13 Oct 2012	9
	Quizzes are rending Moodle useless :-( Locked	Jerry Lau 27 Sept 2018	Jerry Lau 25 Nov 2018	37
	Quizzes : performance on exams period, randomizing questions Locked	Anthony James 21 Oct 2010	Tim Hunt 22 Oct 2010	13
	Quizzes : performance on exams period Locked	Susana L. 12 May 2010	Susana L. 16 Dec 2010	39
	Quiz timer starts before first page loads (Moodle 2.7.19) Locked	Simon Cheng 24 June 2017	Mary Cooch 24 June 2017	2
	quiz records error? Locked	Tzafi Z 30 Apr 2015	Howard Miller 30 Apr 2015	1
	Quiz Question Format Locked	Michael "doc" Crawford 23 Sept 2014	Tim Hunt 23 Sept 2014	1
	Quiz performance with large concurrency Locked	Ray Morris 19 Jan 2013	Howard Miller 21 Jan 2013	5
	Quiz Performance Issues - Mock failed for 263 candidates Locked	Gita Gosavi 20 Dec 2022	Visvanath Ratnaweera 4 Jan 2023	3
	quiz on moodle 2.4 slow Locked	Maram Alsafarini 14 Apr 2015	Maram Alsafarini 14 Apr 2015	4
	Quiz module doesn't load Locked	Justin Dunsworth 17 May 2007	Howard Miller 19 May 2007	1
	Quiz for moodle 2.2--- documents content no data Locked	Maram Alsafarini 29 Mar 2015	Visvanath Ratnaweera 29 Mar 2015	2
	quiz for 150 students Locked	ziv izackov 16 Jan 2017	ziv izackov 16 Jan 2017	9
	quiz conducting 400 users concurrently Locked	sarvesha mv 7 Mar 2018	Moodle Admin 15 Apr 2018	2
	Quiz / Server Crash Locked	Subrahmanyam V V 11 July 2020	Visvanath Ratnaweera 15 July 2020	6
	Quiz - MySQL settings Locked	Vyshnavi Ashish 6 Feb 2012	Visvanath Ratnaweera 11 Feb 2012	10
	quiz - advise needed Locked	jhon grenn 11 June 2017	jhon grenn 28 June 2017	6
	Quick Question: cURL Cache Locked	Deleted user 27 Sept 2011	Deleted user 27 Sept 2011	0
	Quick question about FastCGI settings and https Locked	Mari Cruz García 12 Mar 2013	Mari Cruz García 15 Mar 2013	2
	Quick quesion about enable performance info option in Server -> Debugging -> Performance info" Locked	Wen Hao Chuang 23 Feb 2008	Iñaki Arenaza 23 Feb 2008	1
	questions on server performance Locked	Bill Click 3 June 2005	Howard Miller 4 June 2005	4
	Questions on hosting and requerments Locked	Mary Curie 6 Feb 2012	greg mushial 7 Feb 2012	4
	Questions about load balancing methods and the session cache Locked	Andrew Howe 31 Oct 2018	Marcus Green 4 Nov 2018	6
	Questionnaire is very slow when access by 100 users Locked	CoreDev Develop 3 July 2013	CoreDev Develop 4 July 2013	4
	Question re using linux TOP and associating PID with process/task Locked	Susan Mangan 5 Oct 2013	Susan Mangan 10 Oct 2013	5
	Question about using Xcache with Moodle 2.8 Locked	Robert Blomeyer 4 Apr 2015	Matteo Scaramuccia 4 Apr 2015	1
	Question about too many queries? Locked	Marc Dastous 10 Sept 2004	Marc Dastous 10 Sept 2004	0
	question about required hardware Locked	neama ageb 21 May 2014	Guillermo Madero 22 May 2014	6
	Question about Redis Cluster Failover Locked	Jeff White 6 Jan 2017	Jeff White 6 Jan 2017	0
	Question about file handling and Moodle 2.0 Locked	John Schilling 1 July 2010	Colin Fraser 31 Dec 2010	9
	Question about a query pulled from MySQL slow query log Locked	Wen Hao Chuang 17 Oct 2009	Wen Hao Chuang 23 Oct 2009	17
	Question Locked	Vladimir Sarovic 10 Feb 2011	Claude Whitmyer 10 Feb 2011	1
	Quest for Speed Moodle 2.0 on bluehost Locked	Daniel Brouse 16 Feb 2011	Tim Hunt 16 Feb 2011	1
	Qptimal value of KeepAliveTimeout Locked	Marcus Ng 13 Oct 2021	Alex Rowe 10 Nov 2021	3
	Put moodle in another server Locked	Nuno Frias 2 Feb 2005	Ian Semey 30 Mar 2005	1
	Purge cache for multi nginx server Locked	Son TRAN 4 July 2021	Howard Miller 5 July 2021	4
	Purge / flush memcached_store command line Locked	Mike Wilson 16 Aug 2016	Mike Wilson 17 Aug 2016	4
	Publishing technical specs for Moodle sites Locked	Zbigniew Fiedorowicz 11 Feb 2005	Zbigniew Fiedorowicz 12 Feb 2005	2
	Proxy balancer and stickysession value Locked	Bko 83 21 July 2009	Bko 83 21 July 2009	0
	Pros and cons of different architectures Locked	Tim Thomas 28 Aug 2006	Brett Drinkwater 1 Sept 2006	11
	Proposed removal of MongoDB Cache store Locked	Andrew Lyons 17 Feb 2023	Andrew Lyons 17 Feb 2023	0
	Proposed architecture for Moodle 2.x Locked	Cathal O'Riordan 1 Mar 2012	Andrew Lyons 27 June 2012	16
	Proposal: Reduce session lock contention with opt-in READ_ONLY_SESSION Locked	Adam Eijdenberg 21 Feb 2017	Tim Hunt 22 Feb 2017	3
	Proposal to turn on quiz auto-save by default Locked	Tim Hunt 7 Oct 2014	Tim Hunt 7 Oct 2014	0
	Profile specific pages with XHProf Locked	Nathan Bruley 14 Aug 2014	Nathan Bruley 15 Aug 2014	2
	Profile pictures loads very slow on Moodle 2.2 Locked	Mats Johansson 29 May 2013	Mats Johansson 29 May 2013	2
	Problems with server Locked	J S H 29 Nov 2011	Alex Walker 9 Dec 2011	4
	problems with PHP and eAccelerator installed from yum Locked	Thomas Haines 24 Aug 2009	Thomas Haines 24 Aug 2009	0
	Problems with my.cnf for moodle 8.2 Locked	Abulkhair Islamov 17 Nov 2021	Ken Task 23 Nov 2021	5
	Problems with moodledata file permissions Locked	Julio Alberto Otero Cabero 29 June 2006	Julio Alberto Otero Cabero 4 July 2006	5
	Problems with MongoDB for application cache? Locked	Colin Campbell 6 July 2014	Colin Campbell 6 July 2014	0
	Problems with indexes in mySQL Locked	Joseph Rézeau 22 Sept 2005	Jean-Pierre Pawlak 24 Sept 2005	1
	Problems with cron after upgrading to 2.1.x -> 2.2.x Locked	Tim Hunt 3 Apr 2012	Tim Hunt 11 Apr 2012	3
	Problems with architecture Locked	Albert Ramsbottom 29 Nov 2016	Albert Ramsbottom 30 Nov 2016	10
	Problems with Apache 2 Locked	Josep M. Fontana 29 July 2005	Juan David Martínez Pavony 31 Jan 2006	9
	Problems with 100 hundred users with Postgres Locked	Graciela Vargas 10 Mar 2005	Eloy Lafuente (stronk7) 12 Mar 2005	7
	Problems to load the Administration Section Locked	Fabian Belledi 16 June 2016	Emma Richardson 17 June 2016	3
	Problems setting up mac OSX web sharing to host moodle locally Locked	Rosa E. Marchand 13 Sept 2005	Rich Eng 25 Sept 2005	12
	Problems saving multiple choice questions in the quiz module Locked	Larry Shield 29 July 2005	Helen Foster 31 July 2005	4
	Problems mounting Moodledata via NFS on CentOS Locked	António Godinho 17 Apr 2020	Howard Miller 21 Apr 2020	20
	Problems crashing on the server Locked	Franky Vallori 29 June 2018	Albert Ramsbottom 9 July 2018	7
	Problems after upgraded to php 4.4 Locked	Help Hypersonic 11 Aug 2005	Help Hypersonic 11 Aug 2005	0
	Problem with uploading SCORM package to Moodle 2.4.1 platform Locked	Gary Lebowitz 9 Mar 2013	Gary Lebowitz 9 Mar 2013	0
	problem with sessions? Cannot login Locked	George Harrison 6 Oct 2005	Just H 8 Oct 2005	2
	Problem with Purge Caches Moodle 3.3 Locked	Percy Astocaza 26 Jan 2018	Jeff White 3 May 2018	4
	Problem with performance when i use chat Locked	Javier Lázaro 10 Mar 2006	Javier Lázaro 10 Mar 2006	0
	problem with moodle 2, pgpool2 and 2 postgres 9.0 Locked	pablo saldivia 26 Apr 2013	pablo saldivia 30 Apr 2013	3
	Problem with Module Auth is not readable, check ... Locked	marcos2 silva2 27 July 2011	marcos2 silva2 27 July 2011	0
	Problem with login-language selection box in windows Locked	Aniceto Goni 9 Jan 2006	Aniceto Goni 11 Jan 2006	3
	problem with LMSInitialize Locked	palak suneja 25 Apr 2006	palak suneja 25 Apr 2006	0
	Problem with links when changing to another server Locked	Javier Lázaro 23 Feb 2005	Javier Lázaro 10 Mar 2005	3
	Problem with large backup files Locked	David Bolger 6 Dec 2013	Visvanath Ratnaweera 7 Dec 2013	2
	Problem with Google SSO Locked	amarnath Kamepalli 18 Sept 2014	amarnath Kamepalli 18 Sept 2014	0
	Problem with Godaddy Virtual Dedicated Server nd Moodle 2.3.3 Locked	Gary Lebowitz 3 Feb 2013	Gary Lebowitz 12 Feb 2013	11
	Problem with email servicie Locked	Sebastian Otero 1 May 2011	Visvanath Ratnaweera 1 May 2011	1
	Problem with email messages in 2.7 Locked	Gary Lebowitz 8 Nov 2014	Gary Lebowitz 8 Nov 2014	2
	Problem with course restore Locked	Marian Kočenda 15 Dec 2016	Jeff White 16 Dec 2016	2
	Problem with Alignment of buttons and quiz module when accessed through Loadbalancer IP Locked	shrikant gakhare 8 May 2013	shrikant gakhare 15 May 2013	4
	Problem with a load balancer in AWS Locked	Joel Szwarcbort 4 Nov 2019	Howard Miller 4 Nov 2019	1
	problem with \core\event\course_viewed user 0	William Fibrianto Hoesada 10 Nov 2023	Visvanath Ratnaweera 14 Nov 2023	3
	Problem Submitting Quiz Locked	azam db 26 July 2011	Visvanath Ratnaweera 10 Aug 2011	1
	problem on the mdl_grade_grades_category moodle 2.8, high cpu use in my server of databases. Locked	Eduardo Miranda 18 Mar 2015	Susan Mangan 27 Aug 2015	3
	Problem of performance Locked	mimi nom 20 Feb 2017	mimi nom 21 Feb 2017	4