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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
	Moodle on AWS load balancing Architecture Locked	Steve Pollock 19 Apr 2017	Tawfik Daim 21 Oct 2017	14
	Debugging Debug report.... Locked	Steve Ambro v3.8 11 July 2016	Steve Ambro v3.8 11 July 2016	2
	Move database to new server (?SAN?) Locked	steve farrow 12 Aug 2011	steve farrow 12 Aug 2011	0
	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
	Which Linux? Locked	Steve Squires 13 May 2010	Mary Evans 7 June 2010	22
	porting Linux Moodle to Windows Moodle Locked	Steve Peters 19 July 2008	Ken Wilson 3 Aug 2008	10
	Worried about the performance of our moodle server ! Continued... Locked	Steve Audus 18 June 2008	Myles Carrick 21 July 2008	2
	Worried about the performance of our moodle server ! Locked	Steve Audus 7 June 2008	Steve Audus 9 June 2008	3
	Hardware & Software to run Moodle Locked	Steve Hill 13 May 2008	Steve Hill 17 May 2008	5
	Moodle running in virtual server environment? Locked	Steve Reed 9 Feb 2008	Greg Hayden 11 Feb 2008	5
	CSS not being found on external access Locked	Steve Blakemore 9 Jan 2008	Paul Holden 22 Jan 2008	1
	Upgrading MySql -- What are my chances for problems? Locked	Steve Hyndman 31 May 2006	Steve Hyndman 31 May 2006	4
	Moodle Hosting Sites Locked	Steve Wu 14 Mar 2006	Claude Whitmyer 14 Dec 2010	19
	Host Moodle at 1 and 1 .com Locked	Steve Chorny 14 July 2004	W Page 14 July 2004	3
	Server Loads Locked	Steve Edwards 22 Jan 2004	Sean McKay 24 July 2004	16
	Conflict between mod_perl and zlib causes instability. Locked	Steve Edwards 9 Dec 2003	rich t 16 Dec 2003	2
	Aborted Connection (Unknown Error) - Memory Related? Locked	Stephen Teichgraeber 1 Feb 2020	Ken Task 6 Feb 2020	5
	Tuning FCGI and Apache for Moodle Locked	Stephen Bourget 18 May 2019	Simon Lewis 4 Feb 2020	12
	Performance with 2500 concurrent users Locked	Stephen Tod 18 Apr 2019	Howard Miller 21 Apr 2019	5
	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
	Is binary logging required for Moodle 2? Locked	Stephen Overall 16 Apr 2012	Stephen Overall 16 Apr 2012	1
	Dream Hosting Locked	Stephen Plume 3 Jan 2006	Martin Dougiamas 4 Jan 2006	4
	Hosting recommendation Locked	Stephen Plume 21 Dec 2005	Randy Vermaas 27 Jan 2006	12
	30 simultaneous CGI/PHP process limit on server Locked	Stephen Henneberry 22 Sept 2005	Andrew James Smit 5 Oct 2005	3
	Tests settings for performance and usability Locked	Stéphane Poinsart 14 Apr 2020	Stéphane Poinsart 21 Apr 2020	2
	Anyone experimented with ADOdb C extension? Locked	Stefano Garuti 25 Nov 2005	Anthony Borrow 18 Dec 2005	1
	sitedata usage is massive Locked	Stefan McGarvey 6 May 2020	Stefan McGarvey 7 May 2020	13
	configuring redis and APCu Locked	stefan weber 18 Apr 2019	Luis de Vasconcelos 22 May 2019	3
	Moodle on AWS - SSL Locked	Stefan Van De Velde 15 Dec 2016	Jeff White 16 Dec 2016	1
	Two servers for one moodle installation Locked	Stefan Raffeiner 23 Aug 2011	Visvanath Ratnaweera 17 Oct 2011	2
	Moodle on a SYNOLOGY Disk Station Locked	Stefan Wagner 5 Sept 2009	Visvanath Ratnaweera 6 Sept 2009	1
	Tool for performance tests Locked	Stefan Prasse 18 Oct 2008	Stefan Prasse 23 Nov 2008	8
	server shut down by provider Locked	stefan kraus 15 Mar 2006	Visvanath Ratnaweera 14 May 2006	4
	Ideal Server Specs Locked	Stacy Rempel 2 Dec 2015	Visvanath Ratnaweera 5 Dec 2015	5
	Same/Different Moodle courses Locked	SS Khew 1 Dec 2015	Visvanath Ratnaweera 1 Dec 2015	1
	A moodle setup for 10K simultaneous users Locked	Srujan K 4 Dec 2008	Elvedin Trnjanin 6 Jan 2009	7
	How many number of users will support Locked	srikanth raju 15 June 2014	Tim Hunt 16 June 2014	2
	finding function Locked	srikanth raju 13 June 2014	srikanth raju 13 June 2014	0
	Moodle performance issues with mysql Locked	Sreepathy T L 10 Mar 2019	Chris Fryer 18 Feb 2020	8
	Remote Management Locked	sreelatha anugonda 7 Nov 2003	sreelatha anugonda 8 Nov 2003	2
	Training on sizing requirements for installation	Sreekanth Chakravarthy 13 Oct 2023	Sreekanth Chakravarthy 13 Oct 2023	3
	moodle 3.x and bluehost shared hosting incompatibility? Locked	spyros zoup 17 Jan 2017	Dan Rosenthal 30 Jan 2017	16
	Moodle performance Locked	sovannak Soeung 7 July 2020	Howard Miller 7 July 2020	6
	Many small videos in courses Locked	Sonja Sperber 9 Dec 2015	Sonja Sperber 9 Dec 2015	0
	Performance issues Locked	Sonja Sperber 17 Nov 2015	Paul Verrall 20 Nov 2015	10
	Purge cache for multi nginx server Locked	Son TRAN 4 July 2021	Howard Miller 5 July 2021	4
	optimize performance Locked	solmaz naderi 2 Oct 2018	Andrew Lyons 2 Sept 2019	6
	Suggestion on buying used server for home use Locked	snehasis pradhan 27 June 2016	Howard Miller 27 June 2016	1
	XML Error when logging to our development environment Locked	smrithi puli 29 Jan 2009	Tim Hunt 29 Jan 2009	1
	HUGE number of users Locked	Smith Man 13 Oct 2011	Visvanath Ratnaweera 13 Oct 2011	2
	Upload to Moodle Locked	Sinziana Oncioiu 28 June 2011	Visvanath Ratnaweera 3 July 2011	1
	Globally distributed installation Locked	Simon Lewis 22 May 2019	Simon Lewis 24 May 2019	10
	Cluster setup Help Locked	Simon Powell 22 Mar 2019	Visvanath Ratnaweera 29 Mar 2019	19
	Quiz timer starts before first page loads (Moodle 2.7.19) Locked	Simon Cheng 24 June 2017	Mary Cooch 24 June 2017	2
	Moodle not detecting the hardware devices? Locked	Simon Casey 8 Apr 2017	Howard Miller 8 Apr 2017	1
	High CPU when Loading SCORM (in the deep end) Locked	Simon Harbinson 11 Feb 2016	Visvanath Ratnaweera 6 Apr 2016	8
	Intermittent performance problems Locked	Simon Cole 18 Sept 2012	Simon Cole 19 Sept 2012	4
	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
	Server Requirements - help with holiday homework Locked	Simon Borgert 17 Apr 2009	Simon Borgert 28 Apr 2009	2
	Moving to Moodle - Looking For Advice on Server Setup Locked	Simon Boddy 17 June 2008	Simon Boddy 18 June 2008	4
	Why "role_assign()" && "role_unassign()" takes so much time to execute...? Locked	Simon MELIX 3 June 2008	Visvanath Ratnaweera 24 Oct 2008	6
	Moodle site management tool Locked	Simon Britton 26 Mar 2008	Dan Poltawski 26 Mar 2008	3
	Need to Tune Moodle Fast Locked	Simon Fraser 8 Sept 2006	Dr S Bhatia 9 Sept 2006	7
	php_extension mbstring is recommended to be installed/enabled Locked	Simon Scholey 17 Feb 2006	kiran solanki 12 Dec 2007	19
	eAccelerator setting causes blank pages Locked	Sileet A 11 May 2007	Dale Davies 20 Jan 2010	19
	Performence problem in 2.4 Locked	Sigal Rashba 4 Jan 2015	Howard Miller 5 Jan 2015	1
	Advice : AWS Capacity Planning for 20,000 concurrent users Locked	Sid Mad 5 Aug 2016	Albert Ramsbottom 12 Sept 2016	13
	Moodle For 10000 concurrency especially for Quiz Locked	Shyam Jadala 6 Mar 2017	Shyam Jadala 7 Mar 2017	12
	Moodle Resources Locked	Shyam S 26 June 2015	Visvanath Ratnaweera 1 July 2015	8
	Server configuration requirement help Locked	Shyam S 5 Aug 2010	Jon Witts 6 Aug 2010	4
	load user's picture very slow Locked	Shwu-Fen Kuo 3 Aug 2012	Shwu-Fen Kuo 10 Aug 2012	17
	Server Slowness is causing us badly Locked	Shuvendu Pattanayak 16 Jan 2020	Visvanath Ratnaweera 17 Jan 2020	4
	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
	Same application,different hardware,No change in performance Locked	shrikant gakhare 30 Dec 2012	Visvanath Ratnaweera 10 Jan 2013	25
	No performance Improvement after migration to new hardware Locked	shrikant gakhare 28 Dec 2012	shrikant gakhare 10 Jan 2013	7
	Upgrading Moodle (PHP and Mysql) and Hardware for Large IT Company Locked	shrikant gakhare 5 Oct 2012	shrikant gakhare 10 Jan 2013	4
	Moodle Installation for 10000 users and 1500 concurrent users	Shoaib Arif 18 Sept 2023	James Steerpike 18 Sept 2023	4
	Finding max concurrent users of a server Locked	shiva k 16 Feb 2020	Rick Jerz 18 Feb 2020	17
	Migrating from LAN to internet Locked	shiva k 3 Nov 2012	Visvanath Ratnaweera 15 Dec 2012	3
	Issues installing APC on shared server Locked	Shirley Berry 12 Sept 2013	Shirley Berry 13 Sept 2013	8
	Verifying cache_text Locked	Shirley Villanes 18 Dec 2007	Shirley Villanes 18 Dec 2007	0
	Load balancer Locked	Shin Hiorie 19 Jan 2011	Visvanath Ratnaweera 30 Jan 2011	12
	SELECT COUNT query really bringing down performance Locked	Shimron Trammell 27 Jan 2010	Henning Bostelmann 20 Feb 2010	8
	Real database Usage multiple moodle sites Locked	Shimron Trammell 9 Mar 2009	Shimron Trammell 10 Mar 2009	2
	Almost Done Locked	Shimron Trammell 8 Mar 2009	Gary Benner 17 Mar 2009	9
	Moodle Admin Account slow (Version 3.11) Locked	Shibule Ndhambi 15 Feb 2022	Emma Richardson 15 Feb 2022	1
	Page generation runs quickly, but... Locked	Shevchenko Dmitry 30 Sept 2009	Shevchenko Dmitry 2 Oct 2009	5
	moodle slow page loading	Sherzod Zulunov 7 June 2023	Visvanath Ratnaweera 8 June 2023	5
	Adding quiz on course error Locked	Sheryl Villaroman 2 Aug 2016	Sheryl Villaroman 2 Aug 2016	0
	about course quota limit Locked	shen yiching 31 Aug 2005	shen yiching 31 Aug 2005	0
	Quizzes Loads Slow - Other functions working fine Locked	Shelly Vaughan 27 Aug 2019	Mei Ling 4 Oct 2019	5
	Browsers Locked	sheila jagannathan 2 Mar 2007	Pam Redpath 9 Feb 2014	5
	Performance Slow Down when 20 or more users login Locked	sheikh usman 5 Apr 2020	Visvanath Ratnaweera 5 Apr 2020	2
	Moodle 3.4.2 Performance Locked	sheikh usman 30 Apr 2019	Visvanath Ratnaweera 1 May 2019	2
	2 Web Server to One Mysql Locked	Shay Hanna 26 Nov 2012	Simon Story 27 Nov 2012	4
	CSS often fails on IE6/7 (but not FF) Locked	Shaun Daubney 1 July 2008	Shaun Daubney 1 July 2008	0
	Does anyone know why this specific plugin is extremely slow to load Locked	Shanon Kotey 28 Feb 2020	Tim Hunt 28 Feb 2020	2
	unenrolling participants during course reset Locked	Shamim Rezaie 9 Sept 2007	Shamim Rezaie 10 Sept 2007	2
	Database connection failed error Locked	Shakir Gill 7 July 2021	Visvanath Ratnaweera 9 July 2021	4
	uploading large files on moodle not working Locked	Shakir Gill 24 Mar 2020	Shakir Gill 24 Mar 2020	0