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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 3216 discussions
Status	Discussion	Started by	Last post	Replies	Actions
	Moodle Server Crashing Locked	Graham Stone 20 Jan 2014	Ken Task 26 Jan 2014	10
	Help Converting Log Entries to Concurrent Users / RAM Requirement Locked	Matthew Terhune 25 Jan 2014	J S 25 Jan 2014	1
	la informatica Locked	Richard Liranzo Feliz 19 Jan 2014	Germán Valero 19 Jan 2014	1
	Moodle on an iPad Locked	Erin Nickel 18 Jan 2014	ben reynolds 19 Jan 2014	3
	Would this server be powerful enough? Locked	Nathan Bellato 13 Jan 2014	Howard Miller 14 Jan 2014	8
	MySQL connection issues Locked	Tony Yarusso 2 Jan 2014	Tony Yarusso 11 Jan 2014	7
	Hardware Sizing with Cluster Service Locked	Sanchai Leelahakiat 4 Dec 2013	Albert Ramsbottom 8 Jan 2014	15
	Adding APC Extension to PHP fpr Caching Locked	Geoff Diggles 18 Dec 2013	Simon Allison 7 Jan 2014	19
	3 options for Moodle database cluster Locked	CP Lau 10 Sept 2013	CP Lau 6 Jan 2014	13
	problems with apache with 6000 users Locked	Eslam Gamie 5 Jan 2014	Ken Task 6 Jan 2014	3
	$CFG->localcachedir set to TMPFS? Locked	Jeff White 3 Jan 2014	Andrea Bicciolo 4 Jan 2014	4
	The worst scenario for a DB crash caused by innodb_flush_log_at_trx_commit=2 Locked	Toni Soto 29 Dec 2013	jason everling 3 Jan 2014	8
	slowness after the moodle site migration Locked	Pradeep Fernando 2 Jan 2014	Howard Miller 2 Jan 2014	1
	our website loading very sowlly Locked	praveen decode 20 Dec 2013	Usman Asar 26 Dec 2013	3
	How many users I can host with this specs Locked	Romeo Chiritoiu 20 Dec 2013	jason everling 20 Dec 2013	1
	apt-get moodle ERROR 1045 Locked	Dan Baker 18 Dec 2013	Dan Baker 19 Dec 2013	3
	moodle crashed while quiz Locked	Martin Fernandes 5 Dec 2013	Emma Richardson 12 Dec 2013	12
	SCORM will not resume Locked	V Martin 5 Dec 2013	Usman Asar 12 Dec 2013	3
	PHP accelerator rookie questions Locked	Tom Moseley 11 Dec 2013	Tom Moseley 12 Dec 2013	8
	Opcache, Moodle 2.6, and zend Locked	Rick Jerz 8 Dec 2013	Rick Jerz 10 Dec 2013	4
	Inconceivable loss of data Locked	Albert Ramsbottom 14 Nov 2013	Dan Marsden 9 Dec 2013	3
	Recommendation on VPS spec Locked	Melissa Benson 28 Nov 2013	Visvanath Ratnaweera 8 Dec 2013	26
	Problem with large backup files Locked	David Bolger 6 Dec 2013	Visvanath Ratnaweera 7 Dec 2013	2
	How can I improve performance? Locked	samuel h 6 Dec 2013	Howard Miller 6 Dec 2013	1
	Moodle set up for 60 concurrent quiz users Locked	Jeff Baldmann 23 Mar 2013	jason everling 6 Dec 2013	14
	Several Slow courses in M2.5? Locked	Chris Chapman 2 Dec 2013	Howard Miller 3 Dec 2013	3
	video player windows phone in moodle 2.5 Locked	laww m 2 Dec 2013	laww m 3 Dec 2013	2
	Performance with Ajax Locked	Daniel Lombardo 30 Nov 2013	Daniel Lombardo 30 Nov 2013	0
	Recommended Load Balancing algorithms for moodle Locked	m M 30 July 2013	Anna Jonna Ármannsdóttir 29 Nov 2013	7
	Moodle 2.4 session data in memcached Locked	Robert Zakrocki 11 Apr 2013	Anna Jonna Ármannsdóttir 29 Nov 2013	3
	Help ,Hardware and performance for Moodle server" Locked	alex simg 28 Nov 2013	Usman Asar 28 Nov 2013	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
	What makes the "Teaching with Moodle" MOOC course work so well? Locked	Rick Jerz 2 Sept 2013	Anna Jonna Ármannsdóttir 28 Nov 2013	14
	moodle 2.4.7 is very slow....help me please T_T Locked	Johnny Stevens 21 Nov 2013	samuel h 27 Nov 2013	9
	Does this data point to where our bottleneck is. Locked	Rob Monk 15 Nov 2013	Simon Brock 27 Nov 2013	10
	Moodle and Wordpress Server farm/cluster Locked	Paul Garratt 10 June 2013	Albert Ramsbottom 19 Nov 2013	4
	Full Site Backups Locked	Ken Task 16 Nov 2013	Albert Ramsbottom 19 Nov 2013	10
	Hosting "Grade" Locked	David Berghouse 15 Nov 2013	Howard Miller 19 Nov 2013	4
	Using igbinary serializer Locked	Daniel Tran 18 Oct 2013	Adam Durana 16 Nov 2013	1
	Cron for two web servers Locked	Albert Ramsbottom 16 Oct 2013	Guillermo Madero 18 Oct 2013	11
	Is Moodle 2.5.2+ faster than 2.5.1+ ? Locked	Rick Jerz 16 Oct 2013	Rick Jerz 16 Oct 2013	0
	Moodle 2.5.2 Site page loads for admin user Locked	Daniel Mc Sweeney 13 Sept 2013	Haakon Meland Eriksen 16 Oct 2013	2
	Health Tool Locked	Rory Peacock 14 Oct 2013	Rory Peacock 14 Oct 2013	0
	Significant slow down on login Locked	david english 10 Oct 2013	Visvanath Ratnaweera 14 Oct 2013	6
	Jmeter again, different results Locked	Albert Ramsbottom 10 Oct 2013	Mathew Gancarz 11 Oct 2013	1
	System Locking up with more than a dozen users Locked	Mark Hardwick 26 Sept 2013	Mark Hardwick 10 Oct 2013	17
	Can I built moodle site with EasyPHP+windows server2003+moodle2.5.2 Locked	rui zeng 10 Oct 2013	rui zeng 10 Oct 2013	0
	Question re using linux TOP and associating PID with process/task Locked	Susan Mangan 5 Oct 2013	Susan Mangan 10 Oct 2013	5
	Error when testing moodle using JMeter Locked	Albert Ramsbottom 7 Oct 2013	Albert Ramsbottom 8 Oct 2013	4
	Hardware requirement for moodle Locked	Mohan kumar 1 Oct 2013	Emma Richardson 7 Oct 2013	8
	20+ language packs installed - bad for performance? Locked	Judy Hsu 4 Oct 2013	Tim Hunt 4 Oct 2013	1
	Please help me configure mysql for large Moodle site. Locked	Doctor J.W. Müller 3 Oct 2013	jason everling 4 Oct 2013	1
	Hardware for 1400 users Locked	Tobias Ceglarek 1 Oct 2013	jason everling 2 Oct 2013	1
	Moodle performance in hosted environement Locked	Alan Kmiecik 30 Sept 2013	Alan Kmiecik 30 Sept 2013	0
	Activated caching (memcached) produces segmentation faults Locked	franz reitinger 27 Sept 2013	Matteo Ricci 30 Sept 2013	4
	play video in mobile not play Locked	laww m 29 Sept 2013	laww m 29 Sept 2013	0
	Moodle 2.5.2 for Windows loading very slow Locked	Pippo Pioppo 27 Sept 2013	Pippo Pioppo 27 Sept 2013	0
	Moodle High Availability and failed over Locked	CoreDev Develop 2 July 2013	CoreDev Develop 27 Sept 2013	19
	Plugin Error Locked	Freddie Batista 27 Sept 2013	Freddie Batista 27 Sept 2013	0
	Unofficial (?) preview of Moodle 2.6 performance Locked	Justin Filip 27 Sept 2013	Justin Filip 27 Sept 2013	0
	character encoding pound signs Locked	dan attwood 25 Sept 2013	Guillermo Madero 27 Sept 2013	4
	Major Performance Issues 2.4.3 (Need Help) Locked	Rory Peacock 26 Sept 2013	Ken Task 26 Sept 2013	1
	UnixBench Locked	Visvanath Ratnaweera 12 Apr 2012	Visvanath Ratnaweera 25 Sept 2013	16
	Apache processes Locked	Albert Ramsbottom 25 Sept 2013	Howard Miller 25 Sept 2013	1
	Many php-cgi processes brings down moodle, more resources needed? Locked	Paul Lindgreen 19 Sept 2013	Paul Lindgreen 25 Sept 2013	7
	Moodle 2.4.5 vs 2.5.1 performance and MUC APC cache store Locked	Justin Filip 21 Aug 2013	Justin Filip 24 Sept 2013	5
	Error Reading Database Moodle 2.51 Locked	Kevin Miller 23 Sept 2013	Usman Asar 24 Sept 2013	1
	Moodle 1.9 migrated site EXTREMELY SLOW Locked	Doctor J.W. Müller 20 Sept 2013	Adam Durana 24 Sept 2013	3
	Performance on Dreamhost VPS Locked	Jorge Ballesteros 12 Sept 2013	Usman Asar 22 Sept 2013	6
	How to (really) delete fake accounts? Locked	David Dunn 19 Sept 2013	David Dunn 19 Sept 2013	0
	Too many moodle precesses Locked	Ralph Ballier 18 Sept 2013	Ralph Ballier 19 Sept 2013	1
	2.4.5+ (Build: 20130712) - intermittent performance issues Locked	Susan Mangan 5 Sept 2013	Samuel Witzig 17 Sept 2013	10
	Issues installing APC on shared server Locked	Shirley Berry 12 Sept 2013	Shirley Berry 13 Sept 2013	8
	Minimum Hardware Locked	Claire Holland 10 Sept 2013	Visvanath Ratnaweera 13 Sept 2013	4
	Better location for moodledata directory? Locked	hugo joe 10 Sept 2013	jason everling 10 Sept 2013	1
	local mysql vs remote server Locked	Yedidia Klein 2 Sept 2013	Tim Hunt 10 Sept 2013	1
	Server suddenly uses all memory resources. Locked	Arnold Lamont 9 Sept 2013	Arnold Lamont 9 Sept 2013	0
	Poor performance on Windows virtual server Locked	Scott Christy 1 Aug 2013	AL Rachels 6 Sept 2013	17
	Super slow site Locked	Eugene Voevodin 6 Sept 2013	Eugene Voevodin 6 Sept 2013	0
	Godaddy: VPS or (which) dedicated? Locked	Gary Lebowitz 11 Feb 2013	Yousef H. 5 Sept 2013	22
	Restoring courses is slow, php settings advice Locked	Rick Jerz 30 Aug 2013	Rick Jerz 5 Sept 2013	7
	Hardware Architecture of Moodle (moodle.org) Site Locked	Usman Asar 30 Aug 2013	Guillermo Madero 31 Aug 2013	3
	Moodle crash error Locked	Vic Vicenzi 28 Aug 2013	Vic Vicenzi 31 Aug 2013	7
	Moodle-data storage advice needed for SAN Locked	Albert Ramsbottom 24 July 2013	jason everling 31 Aug 2013	29
	M 2.5.1, running very, very slow Locked	Guillermo Madero 3 Aug 2013	Guillermo Madero 30 Aug 2013	28
	Performance hit on 2.5 upgrade for admin users Locked	John Porten 20 June 2013	Guillermo Madero 30 Aug 2013	8
	Moodle 2.5.1 running slow -- with troubleshooting details Locked	Megan Hayes-Golding 23 Aug 2013	Howard Miller 27 Aug 2013	6
	how many users with same ip? Locked	H B 19 Nov 2010	Eduardo Gomez 27 Aug 2013	9
	Memcache Configuration Locked	Mark Williams 16 Aug 2013	jason everling 27 Aug 2013	8
	Large site, VMWare, Advice needed Locked	heli g 23 Mar 2010	J S 25 Aug 2013	26
	High Load Averages Locked	Cherie Turek 15 Sept 2007	J S 25 Aug 2013	2
	My Moodle 2.5.1 is performing very slowly Locked	Richard Solomon 25 Aug 2013	J S 25 Aug 2013	2
	Use Drizzle instead of MySQL database Locked	Ricardo De la Garza 30 Mar 2010	Sekahr m 23 Aug 2013	3
	Moodle causing httpd service to hog CPU Locked	Ash Roach 22 Aug 2013	Ash Roach 22 Aug 2013	0
	new installation for 3000 simultaneous users Locked	Jose Martin 16 Jan 2008	Mr. Marc 21 Aug 2013	42
	Moodle work very slow and Apache crash down Locked	Aurimas J 20 Aug 2013	Aurimas J 21 Aug 2013	4
	Size problems: files not cleaned Locked	David Dunn 13 Aug 2013	Guillermo Madero 16 Aug 2013	15
	moodle cachestore_file Locked	Johan Loubser 8 July 2013	Tim Hunt 13 Aug 2013	11
	Google Page Speed Insights updated Locked	David Scotson 2 Aug 2013	David Scotson 12 Aug 2013	4
	multi hosting/vps server expert required Locked	Sarah Jane 23 July 2013	Visvanath Ratnaweera 10 Aug 2013	1