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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
	can not open recent msg history Locked	Serg Tolpygin 16 Sept 2015	Serg Tolpygin 16 Sept 2015	0
	1.8 or 1.9? MySQL or PostgreSQL? Locked	Sergei Yegorov 7 Feb 2008	Sergei Yegorov 14 Feb 2008	11
	Is Moodle using the MySQL sys schema? Locked	Sergey Kinash 16 July 2017	Sergey Kinash 17 July 2017	2
	Delayed mailings Locked	Sergio Comerón 1 Feb 2018	Sergio Comerón 22 Feb 2018	3
	Certified plugin Locked	Sergio Rodriguez 2 Oct 2021	Sergio Rodriguez 4 Oct 2021	2
	Moodle 2.5.1 running slow on any machine I use Locked	Sergiu Lazarescu 1 Aug 2013	Sergiu Lazarescu 1 Aug 2013	0
	Flushing all the caches causes a fatal error Locked	Service Usagers du Numérique 12 Apr 2019	Service Usagers du Numérique 13 Apr 2019	2
	hardware recommendations Locked	seth washeck 6 Feb 2009	Howard Miller 7 Feb 2009	3
	Database overload everyday at 1.00pm - err Locked	Seth Mengal 27 Feb 2014	james mergenthaler 11 Apr 2014	8
	NewRelic RPM & Moodle Errors / Issues Locked	Seth Mengal 20 Apr 2015	James McLean 21 Apr 2015	1
	Recommend Settings Amazon AWS (Managed by Cloudways) Locked	Seth Mengal 10 Sept 2015	Seth Mengal 9 Dec 2015	6
	High CPU usage on Windows Platform Locked	SF Lee 22 Feb 2007	Visvanath Ratnaweera 23 Feb 2007	2
	database connection failure Locked	shahin ghanei 10 Jan 2006	N Hansen 12 Jan 2006	7
	Hardware/hosting for 1000 users accessing scorm Locked	Shail Chopra 13 Feb 2012	Visvanath Ratnaweera 26 Feb 2012	6
	Cloud hosting for Moodle: Options and pros/cons Locked	Shail Chopra 21 Feb 2012	Ruvi Wijesuriya 11 Sept 2015	8
	how to make templates Locked	shailendra pratap singh 2 May 2011	Visvanath Ratnaweera 5 May 2011	1
	uploading large files on moodle not working Locked	Shakir Gill 24 Mar 2020	Shakir Gill 24 Mar 2020	0
	Database connection failed error Locked	Shakir Gill 7 July 2021	Visvanath Ratnaweera 9 July 2021	4
	unenrolling participants during course reset Locked	Shamim Rezaie 9 Sept 2007	Shamim Rezaie 10 Sept 2007	2
	Does anyone know why this specific plugin is extremely slow to load Locked	Shanon Kotey 28 Feb 2020	Tim Hunt 28 Feb 2020	2
	CSS often fails on IE6/7 (but not FF) Locked	Shaun Daubney 1 July 2008	Shaun Daubney 1 July 2008	0
	2 Web Server to One Mysql Locked	Shay Hanna 26 Nov 2012	Simon Story 27 Nov 2012	4
	Moodle 3.4.2 Performance Locked	sheikh usman 30 Apr 2019	Visvanath Ratnaweera 1 May 2019	2
	Performance Slow Down when 20 or more users login Locked	sheikh usman 5 Apr 2020	Visvanath Ratnaweera 5 Apr 2020	2
	Browsers Locked	sheila jagannathan 2 Mar 2007	Pam Redpath 9 Feb 2014	5
	Quizzes Loads Slow - Other functions working fine Locked	Shelly Vaughan 27 Aug 2019	Mei Ling 4 Oct 2019	5
	about course quota limit Locked	shen yiching 31 Aug 2005	shen yiching 31 Aug 2005	0
	Adding quiz on course error Locked	Sheryl Villaroman 2 Aug 2016	Sheryl Villaroman 2 Aug 2016	0
	moodle slow page loading	Sherzod Zulunov 7 June 2023	Visvanath Ratnaweera 8 June 2023	5
	Page generation runs quickly, but... Locked	Shevchenko Dmitry 30 Sept 2009	Shevchenko Dmitry 2 Oct 2009	5
	Moodle Admin Account slow (Version 3.11) Locked	Shibule Ndhambi 15 Feb 2022	Emma Richardson 15 Feb 2022	1
	Almost Done Locked	Shimron Trammell 8 Mar 2009	Gary Benner 17 Mar 2009	9
	Real database Usage multiple moodle sites Locked	Shimron Trammell 9 Mar 2009	Shimron Trammell 10 Mar 2009	2
	SELECT COUNT query really bringing down performance Locked	Shimron Trammell 27 Jan 2010	Henning Bostelmann 20 Feb 2010	8
	Load balancer Locked	Shin Hiorie 19 Jan 2011	Visvanath Ratnaweera 30 Jan 2011	12
	Verifying cache_text Locked	Shirley Villanes 18 Dec 2007	Shirley Villanes 18 Dec 2007	0
	Issues installing APC on shared server Locked	Shirley Berry 12 Sept 2013	Shirley Berry 13 Sept 2013	8
	Migrating from LAN to internet Locked	shiva k 3 Nov 2012	Visvanath Ratnaweera 15 Dec 2012	3
	Finding max concurrent users of a server Locked	shiva k 16 Feb 2020	Rick Jerz 18 Feb 2020	17
	Moodle Installation for 10000 users and 1500 concurrent users	Shoaib Arif 18 Sept 2023	James Steerpike 18 Sept 2023	4
	Upgrading Moodle (PHP and Mysql) and Hardware for Large IT Company Locked	shrikant gakhare 5 Oct 2012	shrikant gakhare 10 Jan 2013	4
	No performance Improvement after migration to new hardware Locked	shrikant gakhare 28 Dec 2012	shrikant gakhare 10 Jan 2013	7
	Same application,different hardware,No change in performance Locked	shrikant gakhare 30 Dec 2012	Visvanath Ratnaweera 10 Jan 2013	25
	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
	Server Slowness is causing us badly Locked	Shuvendu Pattanayak 16 Jan 2020	Visvanath Ratnaweera 17 Jan 2020	4
	load user's picture very slow Locked	Shwu-Fen Kuo 3 Aug 2012	Shwu-Fen Kuo 10 Aug 2012	17
	Server configuration requirement help Locked	Shyam S 5 Aug 2010	Jon Witts 6 Aug 2010	4
	Moodle Resources Locked	Shyam S 26 June 2015	Visvanath Ratnaweera 1 July 2015	8
	Moodle For 10000 concurrency especially for Quiz Locked	Shyam Jadala 6 Mar 2017	Shyam Jadala 7 Mar 2017	12
	Advice : AWS Capacity Planning for 20,000 concurrent users Locked	Sid Mad 5 Aug 2016	Albert Ramsbottom 12 Sept 2016	13
	Performence problem in 2.4 Locked	Sigal Rashba 4 Jan 2015	Howard Miller 5 Jan 2015	1
	eAccelerator setting causes blank pages Locked	Sileet A 11 May 2007	Dale Davies 20 Jan 2010	19
	php_extension mbstring is recommended to be installed/enabled Locked	Simon Scholey 17 Feb 2006	kiran solanki 12 Dec 2007	19
	Need to Tune Moodle Fast Locked	Simon Fraser 8 Sept 2006	Dr S Bhatia 9 Sept 2006	7
	Moodle site management tool Locked	Simon Britton 26 Mar 2008	Dan Poltawski 26 Mar 2008	3
	Why "role_assign()" && "role_unassign()" takes so much time to execute...? Locked	Simon MELIX 3 June 2008	Visvanath Ratnaweera 24 Oct 2008	6
	Moving to Moodle - Looking For Advice on Server Setup Locked	Simon Boddy 17 June 2008	Simon Boddy 18 June 2008	4
	Server Requirements - help with holiday homework Locked	Simon Borgert 17 Apr 2009	Simon Borgert 28 Apr 2009	2
	Hosting for Moodle 1.9.x, 100 - 3000 users: Advice on specification and pricing Locked	Simon S 14 Aug 2011	Glenys Hanson 15 Aug 2011	4
	Intermittent performance problems Locked	Simon Cole 18 Sept 2012	Simon Cole 19 Sept 2012	4
	High CPU when Loading SCORM (in the deep end) Locked	Simon Harbinson 11 Feb 2016	Visvanath Ratnaweera 6 Apr 2016	8
	Moodle not detecting the hardware devices? Locked	Simon Casey 8 Apr 2017	Howard Miller 8 Apr 2017	1
	Quiz timer starts before first page loads (Moodle 2.7.19) Locked	Simon Cheng 24 June 2017	Mary Cooch 24 June 2017	2
	Cluster setup Help Locked	Simon Powell 22 Mar 2019	Visvanath Ratnaweera 29 Mar 2019	19
	Globally distributed installation Locked	Simon Lewis 22 May 2019	Simon Lewis 24 May 2019	10
	Upload to Moodle Locked	Sinziana Oncioiu 28 June 2011	Visvanath Ratnaweera 3 July 2011	1
	HUGE number of users Locked	Smith Man 13 Oct 2011	Visvanath Ratnaweera 13 Oct 2011	2
	XML Error when logging to our development environment Locked	smrithi puli 29 Jan 2009	Tim Hunt 29 Jan 2009	1
	Suggestion on buying used server for home use Locked	snehasis pradhan 27 June 2016	Howard Miller 27 June 2016	1
	optimize performance Locked	solmaz naderi 2 Oct 2018	Andrew Lyons 2 Sept 2019	6
	Purge cache for multi nginx server Locked	Son TRAN 4 July 2021	Howard Miller 5 July 2021	4
	Performance issues Locked	Sonja Sperber 17 Nov 2015	Paul Verrall 20 Nov 2015	10
	Many small videos in courses Locked	Sonja Sperber 9 Dec 2015	Sonja Sperber 9 Dec 2015	0
	Moodle performance Locked	sovannak Soeung 7 July 2020	Howard Miller 7 July 2020	6
	moodle 3.x and bluehost shared hosting incompatibility? Locked	spyros zoup 17 Jan 2017	Dan Rosenthal 30 Jan 2017	16
	Training on sizing requirements for installation	Sreekanth Chakravarthy 13 Oct 2023	Sreekanth Chakravarthy 13 Oct 2023	3
	Remote Management Locked	sreelatha anugonda 7 Nov 2003	sreelatha anugonda 8 Nov 2003	2
	Moodle performance issues with mysql Locked	Sreepathy T L 10 Mar 2019	Chris Fryer 18 Feb 2020	8
	finding function Locked	srikanth raju 13 June 2014	srikanth raju 13 June 2014	0
	How many number of users will support Locked	srikanth raju 15 June 2014	Tim Hunt 16 June 2014	2
	A moodle setup for 10K simultaneous users Locked	Srujan K 4 Dec 2008	Elvedin Trnjanin 6 Jan 2009	7
	Same/Different Moodle courses Locked	SS Khew 1 Dec 2015	Visvanath Ratnaweera 1 Dec 2015	1
	Ideal Server Specs Locked	Stacy Rempel 2 Dec 2015	Visvanath Ratnaweera 5 Dec 2015	5
	server shut down by provider Locked	stefan kraus 15 Mar 2006	Visvanath Ratnaweera 14 May 2006	4
	Tool for performance tests Locked	Stefan Prasse 18 Oct 2008	Stefan Prasse 23 Nov 2008	8
	Moodle on a SYNOLOGY Disk Station Locked	Stefan Wagner 5 Sept 2009	Visvanath Ratnaweera 6 Sept 2009	1
	Two servers for one moodle installation Locked	Stefan Raffeiner 23 Aug 2011	Visvanath Ratnaweera 17 Oct 2011	2
	Moodle on AWS - SSL Locked	Stefan Van De Velde 15 Dec 2016	Jeff White 16 Dec 2016	1
	configuring redis and APCu Locked	stefan weber 18 Apr 2019	Luis de Vasconcelos 22 May 2019	3
	sitedata usage is massive Locked	Stefan McGarvey 6 May 2020	Stefan McGarvey 7 May 2020	13
	Anyone experimented with ADOdb C extension? Locked	Stefano Garuti 25 Nov 2005	Anthony Borrow 18 Dec 2005	1
	Tests settings for performance and usability Locked	Stéphane Poinsart 14 Apr 2020	Stéphane Poinsart 21 Apr 2020	2
	30 simultaneous CGI/PHP process limit on server Locked	Stephen Henneberry 22 Sept 2005	Andrew James Smit 5 Oct 2005	3
	Hosting recommendation Locked	Stephen Plume 21 Dec 2005	Randy Vermaas 27 Jan 2006	12
	Dream Hosting Locked	Stephen Plume 3 Jan 2006	Martin Dougiamas 4 Jan 2006	4
	Is binary logging required for Moodle 2? Locked	Stephen Overall 16 Apr 2012	Stephen Overall 16 Apr 2012	1
	Slow response using Chrome when compared to IE - 2.8.3 (Build: 20150202) Locked	Stephen Bloomer 6 Feb 2015	Stephen Bloomer 7 Feb 2015	5
	Performance with 2500 concurrent users Locked	Stephen Tod 18 Apr 2019	Howard Miller 21 Apr 2019	5
	Tuning FCGI and Apache for Moodle Locked	Stephen Bourget 18 May 2019	Simon Lewis 4 Feb 2020	12
	Aborted Connection (Unknown Error) - Memory Related? Locked	Stephen Teichgraeber 1 Feb 2020	Ken Task 6 Feb 2020	5