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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
	Information on Moodle Scalability (100,000+ users) Locked	Bryan Chapman 19 Aug 2005	Samuli Karevaara 27 Sept 2005	20
	Re: NetMondo - Yikes! Locked	Bryan Williams 20 Jan 2004	NetMondo Web Services 20 Jan 2004	1
	MOODLE muito Lento na minha CPU. Locked	Bruno Santos 13 Feb 2008	Wilker Melo 15 Feb 2008	1
	Statistics stupidly inefficient Locked	Bruce Webster 9 Mar 2009	Matteo Scaramuccia 22 Nov 2010	17
	Recommendation for a Moodle Web Host Locked	Bruce Selzler 14 July 2005	Genner Cerna 14 July 2005	1
	How do you change Servers? Locked	Bruce Selzler 2 Dec 2004	Dave Ray 16 Dec 2004	8
	Uploading PowerPoint documents Locked	Bridget Derham 14 Nov 2007	A. T. Wyatt 15 Nov 2007	1
	Very large course takes a minute to load unless "editing" is on Locked	Brian Merritt 25 Aug 2021	Antoinette Young 2 Feb 2022	18
	Disappearing Redis Cache Store Locked	Brian Y 14 Nov 2020	Brian Y 14 Nov 2020	1
	redis instance added but "Not Ready" Locked	Brian Y 11 June 2020	Brian Y 17 June 2020	2
	As close to 100% uptime as possible, failover server? Locked	Brian Y 9 Feb 2014	Albert Ramsbottom 11 Feb 2014	3
	/mod/quiz/view.php progressively slower Locked	brian shore 26 July 2013	Tim Hunt 26 July 2013	1
	File Size in the Moodle Web Server Locked	Brian zhang 11 Aug 2011	sam marshall 11 Aug 2011	1
	Newbie From PA Locked	Brian Snapp 24 Mar 2006	Visvanath Ratnaweera 24 Mar 2006	1
	Moodle 2.4 Hardware and Performance Optimization Locked	Brett Cairns 28 June 2013	Brett Cairns 3 July 2013	2
	Moodle Performance Testing in AWS Locked	Brett Cairns 20 June 2013	Grant Mucha 5 July 2013	5
	Moodle for Windows on a USB Stick Locked	Brett Drinkwater 12 May 2006	ben reynolds 29 July 2010	37
	Timeouts Locked	Brent Lee 14 Sept 2005	Brent Lee 14 Sept 2005	2
	High CPU usage after Upgrade to 1.9.6+ Locked	Breno Jacinto 7 Nov 2009	Breno Jacinto 9 Nov 2009	2
	What size server Locked	Brendan Leahy 9 Oct 2006	Ralph Patterson 17 Oct 2006	13
	Apache Memory Leak Locked	Brant Peterson 8 Feb 2008	Mark Hilliard 23 Mar 2010	27
	Are You Using Virtual Servers with Moodle? Locked	Brandt Linkowski 6 Jan 2006	Mikael Ekblom 16 Jan 2006	4
	Assignment Submission Taking over 5 minutes Locked	Brandon Stocks 27 Mar 2017	Brandon Stocks 29 Mar 2017	2
	Filesystem recommendations for cross-network HA setup? Locked	Brad Smith 12 Mar 2016	Albert Ramsbottom 6 Apr 2016	20
	Investigating excessive(?) DB hits Locked	Brad Smith 11 June 2015	Brad Smith 11 June 2015	3
	Moodle 2.2 connection-specific(??) hangs? Locked	Brad Smith 18 Nov 2014	Howard Miller 19 Nov 2014	5
	Apache CPU usage shoots to >= 100%. Why? Locked	Brad Smith 28 July 2014	Brad Smith 7 Aug 2014	12
	eAccelerator Locked	Brad Fisher 17 Feb 2014	jason everling 27 Mar 2014	3
	Can you help me with a hardware reccomendation Locked	Brad Hess 14 Oct 2010	Visvanath Ratnaweera 17 Oct 2010	1
	Admin user logging into Moodle 1.9.4 behind a hardware load balancer Locked	Brad Marshall 3 Mar 2009	Brad Marshall 12 Mar 2009	5
	Moodle Host Site info requested Locked	Brad Mills 29 Oct 2008	Visvanath Ratnaweera 1 Nov 2008	5
	apache hang Locked	boke xu 28 Aug 2012	boke xu 28 Aug 2012	2
	Load Balanced and Auto-Scalling with Amazon EC2 Locked	Bobby Kneisel 22 May 2013	jason everling 6 June 2013	3
	php Locked	bob humble 5 Oct 2015	bob humble 8 Oct 2015	3
	Moodle.org platform Locked	Bob Puffer 5 Oct 2010	Jordan Tomkinson 6 Oct 2010	7
	Planning new server hardware; and deciding between WAMP & LAMP Locked	Bob Majors 15 Jan 2008	Visvanath Ratnaweera 1 May 2008	17
	huge database Locked	bob goossens 28 Nov 2006	bob goossens 4 Dec 2006	2
	Can backup of data w/ 3rd party sw cause problems? Locked	Bob Majors 11 Oct 2006	Bob Majors 26 Oct 2006	5
	What skills does a server admin need? Locked	Bob Majors 11 Mar 2005	iudicium ferat 7 Apr 2005	3
	AMP: Individual install or all-in-one Locked	Bob Boufford 16 Nov 2004	Bob Boufford 17 Nov 2004	2
	Server hardware recommendations; system admin time required Locked	Bob Majors 21 Sept 2004	Thomas Haynes 25 Sept 2004	2
	Proxy balancer and stickysession value Locked	Bko 83 21 July 2009	Bko 83 21 July 2009	0
	Mapped network drive not working as Moodle Data Directory Locked	Bjorn Jurgens 26 Nov 2005	M Moodley 11 Dec 2005	1
	Large Scale Moodle Implementation Help Locked	Bipin Das 15 July 2009	Justin Haaga 27 Aug 2009	7
	Apache Configuration for 2000 Users for Quiz ?? Locked	Bipin Das 15 June 2009	Martín Langhoff 18 June 2009	13
	Hardware Loadbalancer for Moodle Locked	Bipin Das 11 June 2009	Carlos Romero 15 June 2009	3
	increase session_data cache size for LMS users Locked	Billy Zwiener 25 June 2016	Billy Zwiener 25 June 2016	0
	trying to preview in a proxy but getting some weird behavior. Is this normal of a proxy? Locked	Billy Zwiener 30 Apr 2016	Billy Zwiener 30 Apr 2016	0
	How might I go about purging huge tables/ can I delete quiz attempts PAST a certain date only? Locked	Billy Zwiener 27 Apr 2016	Tim Hunt 28 Apr 2016	3
	Crashing under increased activity... But not a lot ... 20 users maybe at the same time? Locked	Billy Zwiener 27 Apr 2016	Billy Zwiener 27 Apr 2016	6
	dcachesize on server going high on my server and causing server problems Locked	Billy Zwiener 19 Dec 2015	Billy Zwiener 21 Dec 2015	2
	Slowdown and incompatability in move from 2.2. to 2.3 Locked	Bill Steele 22 Sept 2012	Visvanath Ratnaweera 25 Sept 2012	5
	How do I turn logging off? Locked	Bill Parsons 18 Feb 2010	Bill Parsons 18 Feb 2010	0
	Upgrades Locked	Bill Meister 8 May 2009	Eric Hagley 8 May 2009	1
	Which PHP?? Locked	Bill Click 9 June 2005	ryan wise 13 June 2005	3
	questions on server performance Locked	Bill Click 3 June 2005	Howard Miller 4 June 2005	4
	How to PHP accelerate Moodle 1.2? Locked	Bill Bimber 16 Feb 2004	Martin Dougiamas 16 Feb 2004	1
	Replicating/Moving Locked	Bill Moseley 23 Aug 2003	Frederic Triquet 14 Nov 2003	6
	Workaround to load files without file.php Locked	Biel Frontera 14 Jan 2013	Simon Story 15 Jan 2013	2
	Hardware Locked	Bidur Shrestha 13 Apr 2007	Bidur Shrestha 13 Apr 2007	0
	Change Limit Size Upload File in iBook G4 Locked	Biamin Ahmad 13 Nov 2005	Chris Valentine 22 Nov 2005	2
	Design Constraints of Moodle Locked	Bertie Corrie 2 Apr 2014	Bertie Corrie 2 Apr 2014	3
	JMeter trouble Locked	Bernat Martinez 7 July 2017	Bernat Martinez 21 July 2017	2
	CPU overloaded Locked	Bernat Martinez 3 July 2017	Bernat Martinez 6 July 2017	6
	is MySQL 5.5 Ok for Moodle 1.9 Locked	Bernat Martinez 3 Sept 2014	Rick Jerz 4 Sept 2014	6
	overload warning, without commensurate traffic Locked	Benz Kohlee 28 Apr 2006	Benz Kohlee 12 May 2006	4
	idnumber=NULL in mdl_course_modules Locked	Bente Olsen 19 Jan 2011	Bente Olsen 20 Jan 2011	2
	Extending browser cache Locked	Benjamin Bøndergaard 13 Aug 2019	Benjamin Bøndergaard 14 Aug 2019	3
	Moodle 2.4 much slower than 2.3 on Windows Server Locked	Benjamin St.Germain 28 Mar 2013	Paul Lindgreen 28 Nov 2013	22
	mdl_cache_text Locked	Bengt Fellbe 4 Dec 2006	Robert Brenstein 11 June 2009	4
	response time of quizzes Locked	Benedikt Köhler 5 Oct 2022	Tim Hunt 5 Oct 2022	1
	Is NFS v4.1 supported by Moodle	Ben Girard 29 Feb 2024	Sergio Rabellino 1 Mar 2024	3
	Extreme scale - Need help with 1M users, 20K concurrent users using quiz and assignments Locked	Ben Girard 28 June 2022	Ben Girard 28 June 2022	5
	Maximum number of groups possible on a shared IOMAD Course? Locked	Ben Girard 17 Nov 2021	Ben Girard 17 Nov 2021	0
	Plugin AJAX slow to load Locked	Ben Kahn 13 May 2020	Ben Kahn 14 May 2020	2
	Help! Database server CPU maxed out Locked	Ben Kahn 27 Aug 2019	Jerry Lau 12 Sept 2019	14
	Need your advice. Locked	Ben S 1 Nov 2012	Ben S 2 Nov 2012	2
	Moodle 2 pluginfile.php performance Locked	Ben Graham 24 Aug 2011	Troo Don 27 Aug 2011	16
	Buying an in-house server Locked	Ben Archer 12 May 2011	Visvanath Ratnaweera 14 May 2011	5
	bitnami stack moodle on laptop i.p. occupied Locked	ben reynolds 9 Oct 2010	ben reynolds 21 Oct 2010	5
	JMeter Scripts Locked	Ben Steeples 23 Mar 2009	Molin Men 31 July 2014	51
	Moodle 1.8.2 (ODBTP) Locked	Ben Steeples 7 Aug 2007	Ben Steeples 7 Aug 2007	0
	Disabling activity logging Locked	Ben Goodwin 22 June 2005	vancool black 13 Dec 2012	2
	Moodle became very slow after 5 months of decent speed Locked	Bee Bell 10 Dec 2005	Bee Bell 13 Dec 2005	3
	How can I publish webspace Locked	Beat Bürgi 11 Nov 2003	Beat Bürgi 22 Nov 2003	5
	server configuration for 50000 concurrent users Locked	Bav V 16 Mar 2011	Guillermo Madero 2 May 2011	17
	Recommended specs - new moodle installation Locked	Basti Bunz 14 Nov 2018	Ralf Hilgenstock 19 Nov 2018	2
	Time out for grade export to excel Locked	Bas Brands 10 Jan 2012	Visvanath Ratnaweera 13 Jan 2012	1
	Hosting Moodle App for mobile on azure via Bitnami Locked	Deleted user 26 Nov 2020	Deleted user 26 Nov 2020	0
	Moodle pages on local computer open VERY slowly. Locked	Barry Williams 1 Sept 2007	Jez H 3 Sept 2007	1
	How do I tell how many (& which) courses are active on my moodle site? Locked	Barron Koralesky 24 Feb 2006	Barron Koralesky 4 Mar 2006	8
	does "$CFG->dbpersist = false;" override "msql.allow_persistent = On" Locked	Barron Koralesky 15 Sept 2005	Barron Koralesky 15 Sept 2005	0
	Apache--What are you all using for MaxClients setting? [& malloc error] Locked	Barron Koralesky 14 Sept 2005	James Dugal 16 Sept 2005	8
	Apache crash -- malloc: incorrect checksum for freed object -- locks up server and kills moodle Locked	Barron Koralesky 10 Sept 2005	Barron Koralesky 10 Sept 2005	0
	Secure HTTP (https) using MacOS X client Locked	Barron Koralesky 6 July 2005	Tony Hursh 6 July 2005	1
	How many users can access to this server? Locked	baris yuce 17 Aug 2011	Visvanath Ratnaweera 21 Aug 2011	1
	PHP errors Moodle 3.4.5, PHP 7.1.27, MySQL 5.7.23.23 Locked	Barbara Taylor 1 May 2019	Nick Ben 19 Feb 2020	10
	error database failed Locked	Barbara Schroeder 26 Aug 2008	Visvanath Ratnaweera 26 Aug 2008	2
	Sucessfully Conduct 1050 concurrent user on quiz moodle	Balya Rochmadi 6 Nov 2023	Visvanath Ratnaweera 7 Nov 2023	1
	Do we need $CFG->localcachedir after using xsendfile?	Balya Rochmadi 23 Oct 2023	Balya Rochmadi 26 Oct 2023	1