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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
	Several Slow courses in M2.5? Locked	Chris Chapman 2 Dec 2013	Howard Miller 3 Dec 2013	3
	Deploying Moodle on HP Proliant Server Locked	Chris Ekin 22 June 2015	Tim Hunt 23 June 2015	5
	New setup questions Locked	Chris Cormier 18 Aug 2015	Chris Cormier 24 Aug 2015	16
	Disk space, duplicate? Locked	Chris Swaffield 13 Apr 2016	Albert Ramsbottom 14 Apr 2016	3
	Using MySQL memcached API for Moodle session storage Locked	Chris Fryer 18 Nov 2016	Chris Fryer 22 Nov 2016	3
	Email sent via email_to_user() needs to be queued for background sending Locked	Chris Yust 2 Feb 2019	Chris Yust 5 Feb 2019	7
	Seeking recommendations to improve performance Locked	Chris Biggs 16 Apr 2020	Howard Miller 16 Apr 2020	1
	Periodic slowdowns on AWS Locked	Chris Fryer 18 May 2021	Alex Rowe 25 May 2021	5
	Web Hosting Provider Locked	Christa Fairman 21 Mar 2006	Visvanath Ratnaweera 21 Mar 2006	2
	how much Bandwidth Moodle consume?? Locked	Christian Pazmino 3 Aug 2006	Randy Obert 4 Aug 2006	1
	Participants in meta courses aggregate very slowly Locked	Christian Zick 20 Apr 2010	Christian Zick 5 May 2010	2
	Moodle Running So Slow Locked	christian orvin 3 July 2017	Howard Miller 4 July 2017	3
	Very slow login time Locked	Christian Kristiansen 1 Sept 2017	Flemming Bornemann 15 Sept 2017	18
	Large Moodle Implementation Locked	Christopher Medina 7 Mar 2012	Grant Mucha 11 Apr 2012	3
	Finding which courses use most space (split from Moodle running out of space) Locked	Christopher Burger 14 May 2020	Ken Task 7 Aug 2020	3
	Moodle running of Amazon EFS Locked	Christos Savva 13 Sept 2016	Christos Savva 14 Oct 2016	6
	Moodle caches for application are changing without notice? Locked	Christos Savva 28 July 2017	Christos Savva 4 Aug 2017	3
	Moodle using mulitple DB readers and 1 writer? Locked	Christos Savva 2 Aug 2017	Jeff White 5 Aug 2017	4
	Running cron from multiple webservers Locked	Christos Savva 9 Feb 2018	Christos Savva 12 Feb 2018	9
	Moodle Webservices and AWS ElasticCache(memcached) problem Locked	Christos Savva 27 Sept 2018	Christos Savva 27 Sept 2018	0
	Moodle + AWS EFS + filecachesd is it recommended? Locked	Christos Savva 2 Apr 2019	Ben Kahn 31 May 2019	2
	High DB Connections [State sleep] Locked	Christos Savva 15 Oct 2019	Max Maccluer 15 Sept 2020	10
	SQL Server High CPU Locked	Chuck Stratton 23 Jan 2023	Chuck Stratton 23 Jan 2023	0
	Dedicated Server or Linux Locked	Cindy Fajardo 24 Aug 2006	Richie Foreman 24 Aug 2006	4
	Installation of Language Lab on Moodle Locked	CL Winans 14 May 2011	CL Winans 14 May 2011	0
	Minimum Hardware Locked	Claire Holland 10 Sept 2013	Visvanath Ratnaweera 13 Sept 2013	4
	Need help Locked	Clara Hesson 19 Mar 2023	Mary Cooch 19 Mar 2023	1
	Other User Access to a Standalone Moodle Install? Locked	Clare Smith 21 Apr 2005	Clare Smith 26 Apr 2005	5
	Student System Requirements Locked	Clare Marsh 14 Jan 2012	ben reynolds 14 Jan 2012	3
	Moodle Loads Too Long Locked	Clarence Carino 27 Oct 2007	Ken Wilson 3 Dec 2007	9
	Network Latency and AWS Locked	Clarissa S 8 Feb 2017	Santhosh Kumar T 7 Oct 2017	4
	Database size / performance - Moodle 2.0.2 Locked	Class Virtual 14 Sept 2011	Class Virtual 14 Sept 2011	0
	News: Open-Source Storage Community Formed Locked	Claude Whitmyer 2 Nov 2005	Martín Langhoff 2 Nov 2005	1
	Lentezza della nuova versione 1.5 (Version 1.5 is very slow) Locked	claudio premarini 25 July 2005	Sebastian Hensel 31 Aug 2005	7
	Upload Users - Password Generation - e-mail Locked	Claudio Delpino 30 June 2020	Visvanath Ratnaweera 3 July 2020	1
	Forbidden... Locked	Clint Walters 16 Sept 2006	Clint Walters 16 Sept 2006	1
	Ubuntu Cron Locked	Clint Walters 16 Sept 2006	Clive Gould 18 Sept 2006	5
	Troubleshooting Linux Server (localhost vs www) Locked	Clint Walters 20 Sept 2006	Visvanath Ratnaweera 22 Sept 2006	2
	Why is 3.0 running so slow Locked	Clinton Randolph 11 Feb 2016	Ken Task 12 Feb 2016	6
	Turn Editing on for Course Categories very slow Locked	Clive Gould 6 Sept 2006	Clive Gould 16 Sept 2006	2
	I/O File Performance Locked	Coco E. 29 Aug 2019	Visvanath Ratnaweera 17 Sept 2019	10
	how to close database and everything?... Locked	cody ensanian 4 July 2006	Randy Obert 4 July 2006	1
	Moodle on Suse Linux Locked	cody ensanian 26 Apr 2007	Visvanath Ratnaweera 2 May 2007	5
	Mysql performance help Locked	cody ensanian 31 Jan 2009	Taylor Judd 4 Feb 2009	6
	smtphosts or php default which is best? Locked	Colin Campbell 27 May 2005	Colin Campbell 2 June 2005	2
	Server Recommendations Locked	Colin Napier 19 May 2006	Brett Drinkwater 27 May 2006	2
	Problems with MongoDB for application cache? Locked	Colin Campbell 6 July 2014	Colin Campbell 6 July 2014	0
	more than Max Number of concurrent users Locked	Colin Peters 15 Oct 2014	Howard Miller 17 Oct 2014	26
	Dealing with "login storm" Locked	Colin Matheson 18 Dec 2014	ryan sanders 8 Jan 2015	3
	Sessions in Database and memcached Locked	Colin Misbach 20 Jan 2016	Colin Misbach 21 Jan 2016	2
	how to design moodle server for 40,000 users Locked	com cen 11 Dec 2016	com cen 12 Dec 2016	2
	Events queue huge Locked	Conn Warwicker 5 June 2015	Conn Warwicker 10 June 2015	7
	Mac Mini Server Locked	Conor Power 6 Feb 2012	Jeffrey Best 9 Oct 2012	5
	Errors in apache2 log - is this normal? Locked	Conor Bradley 25 May 2017	Conor Bradley 25 May 2017	2
	Site loading Time [ Please Test] Locked	Conrad Taylor 25 Sept 2004	Ger Tielemans 26 Sept 2004	15
	500 Internal Server Errors on saving pages Locked	Conrad Murray 30 Mar 2017	Howard Miller 30 Mar 2017	1
	Load testing V2.8.x Locked	Constance Horne 18 June 2015	Jeff White 24 June 2015	3
	V2.8.x - How to delete all course participation details Locked	Constance Horne 18 June 2015	Constance Horne 23 June 2015	2
	Load Test reveals Access Errors - fonts.gstatic.com (v2.8.4) Locked	Constance Horne 23 June 2015	Constance Horne 23 June 2015	3
	Chrome Device issues (v2.4.0) Locked	Constance Horne 15 July 2015	Constance Horne 15 July 2015	1
	Moodle High Availability and failed over Locked	CoreDev Develop 2 July 2013	CoreDev Develop 27 Sept 2013	19
	Questionnaire is very slow when access by 100 users Locked	CoreDev Develop 3 July 2013	CoreDev Develop 4 July 2013	4
	Apache JMeter stress test for Moodle Questionaire Locked	CoreDev Develop 10 July 2013	CoreDev Develop 2 Aug 2013	4
	High CPU wait time Locked	Corey Brett 8 May 2013	Corey Brett 9 May 2013	3
	Is 371ms within an acceptable range for time to download the dashboard on a new installation? Locked	Corey Brett 24 June 2017	Mathew Gancarz 27 June 2017	2
	Moodle and Content Distribution Networks (CDNs) Locked	corprew reed 23 Mar 2010	Ken Gibson 23 Mar 2010	3
	Moodle extremely slow Locked	Cosmas Kasumba 4 May 2020	Ken Task 21 May 2020	61
	Determining number of users	Cosmas Kasumba 10 Oct 2023	Visvanath Ratnaweera 12 Oct 2023	2
	MySQL vs MS SQL server Locked	CP Lau 15 Mar 2011	Bartosz Cisek 17 Mar 2011	1
	MySQL vs MS SQL server Locked	CP Lau 17 Mar 2011	Visvanath Ratnaweera 18 Mar 2011	2
	Database server of Moodle 2.3.1 is a bottleneck Locked	CP Lau 16 Sept 2012	Simon Story 8 Oct 2012	14
	Setup a MySQL cluster for Moodle Locked	CP Lau 26 Oct 2012	Jonas Asa. 12 Nov 2014	17
	Moodle 2.4 very slow Locked	CP Lau 25 Dec 2012	Visvanath Ratnaweera 26 Dec 2012	3
	mdl_cache_text causes the performance bottlement Locked	CP Lau 5 Feb 2013	CP Lau 4 Mar 2013	3
	What is the correct MUC setting for running Moodle 2.4.4+ in a clustering environment? Locked	CP Lau 2 July 2013	CP Lau 15 July 2013	2
	3 options for Moodle database cluster Locked	CP Lau 10 Sept 2013	CP Lau 6 Jan 2014	13
	Performance testing of Moodle 2.6.1 Locked	CP Lau 11 June 2014	CP Lau 11 June 2014	1
	Topic Outline loads SLOOOOWWW but everything else is ok Please Help :( Locked	Craig S. 12 July 2005	Keith Heinrich 12 July 2005	1
	IP based access Locked	Craig Hicks 6 June 2007	Anthony Borrow 24 Aug 2007	11
	Moodle Hardware for 10,000 users and 300 users concurrent(at the same time) Locked	craig dsouza 29 Oct 2015	Usman Asar 30 Oct 2015	11
	Windows Server 2016, IIS10, MSSQL 2016, PHP7.0 with Moodle 3.6.2+ Locked	Craig Gardner 24 Sept 2019	Usman Asar 7 Nov 2019	10
	Installation for 150.000 users Locked	Cristi Ionescu 26 June 2006	Cristi Ionescu 26 June 2006	0
	Enabling RSS feeds and server load Locked	Cristian Alvarado 18 May 2006	Carl Jones 8 June 2006	2
	Moodle Very slow for users who are not administrators Locked	Cristian Matos 5 May 2015	Marcus Green 4 Sept 2015	7
	Too many opened sessions on Moodle 2.7.20 Locked	Cristian Santibañez 3 July 2019	Andrew Lyons 4 July 2019	2
	Does location affecting moodle site performance Locked	cscl cscl 29 Jan 2013	cscl cscl 30 Jan 2013	2
	Allocating more bandwidth Locked	curt bixel 21 Sept 2012	Visvanath Ratnaweera 21 Sept 2012	1
	The quiz function of moodle 2.3.2 seems to put quite a strain on a server Locked	curt bixel 7 Oct 2012	Michael Haskell 15 Jan 2013	25
	Image Optimization Locked	curt bixel 6 Jan 2013	kenst tjas 22 Feb 2013	7
	What to cache with MemCached Locked	curt bixel 3 Oct 2015	Visvanath Ratnaweera 27 Oct 2015	19
	Do I need Cloudflare Locked	curt bixel 9 Nov 2017	Ken Task 10 Nov 2017	1
	Why are we running so slowly? Locked	d morte 6 Oct 2010	Bartosz Cisek 14 Jan 2011	20
	A series of evaluation technical questions Locked	D.I. von Briesen 16 Feb 2006	Visvanath Ratnaweera 27 Feb 2006	1
	Optmize Database Automatically Using Cron jobs for Unix Users Locked	D3SI Boy 28 Jan 2008	Martín Langhoff 29 Jan 2008	3
	Updating a plugin takes several hours	Dácil Blanco Francisco 30 Nov 2023	Dácil Blanco Francisco 17 Jan 2024	16
	Reduce bandwidth by 80-85%!!! Locked	Dakota Duff 11 July 2008	Howard Miller 1 Dec 2014	10
	Experiments in Performance Optimization Locked	Dakota Duff 10 Feb 2009	Dakota Duff 11 Feb 2009	4
	Zip Performance in Moodle Locked	Dale Davies 16 Mar 2015	Howard Miller 17 Mar 2015	1
	"MySQL server has gone away" Locked	Dallen Farmer 17 Sept 2012	Visvanath Ratnaweera 19 Sept 2012	8
	pgbouncer, transaction pooling and MDL-60174 Locked	Damyon Wiese 28 Nov 2017	Damyon Wiese 28 Nov 2017	0