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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
	how to make templates Locked	shailendra pratap singh 2 May 2011	Visvanath Ratnaweera 5 May 2011	1
	Cloud hosting for Moodle: Options and pros/cons Locked	Shail Chopra 21 Feb 2012	Ruvi Wijesuriya 11 Sept 2015	8
	Hardware/hosting for 1000 users accessing scorm Locked	Shail Chopra 13 Feb 2012	Visvanath Ratnaweera 26 Feb 2012	6
	database connection failure Locked	shahin ghanei 10 Jan 2006	N Hansen 12 Jan 2006	7
	High CPU usage on Windows Platform Locked	SF Lee 22 Feb 2007	Visvanath Ratnaweera 23 Feb 2007	2
	Recommend Settings Amazon AWS (Managed by Cloudways) Locked	Seth Mengal 10 Sept 2015	Seth Mengal 9 Dec 2015	6
	NewRelic RPM & Moodle Errors / Issues Locked	Seth Mengal 20 Apr 2015	James McLean 21 Apr 2015	1
	Database overload everyday at 1.00pm - err Locked	Seth Mengal 27 Feb 2014	james mergenthaler 11 Apr 2014	8
	hardware recommendations Locked	seth washeck 6 Feb 2009	Howard Miller 7 Feb 2009	3
	Flushing all the caches causes a fatal error Locked	Service Usagers du Numérique 12 Apr 2019	Service Usagers du Numérique 13 Apr 2019	2
	Moodle 2.5.1 running slow on any machine I use Locked	Sergiu Lazarescu 1 Aug 2013	Sergiu Lazarescu 1 Aug 2013	0
	Certified plugin Locked	Sergio Rodriguez 2 Oct 2021	Sergio Rodriguez 4 Oct 2021	2
	Delayed mailings Locked	Sergio Comerón 1 Feb 2018	Sergio Comerón 22 Feb 2018	3
	Is Moodle using the MySQL sys schema? Locked	Sergey Kinash 16 July 2017	Sergey Kinash 17 July 2017	2
	1.8 or 1.9? MySQL or PostgreSQL? Locked	Sergei Yegorov 7 Feb 2008	Sergei Yegorov 14 Feb 2008	11
	can not open recent msg history Locked	Serg Tolpygin 16 Sept 2015	Serg Tolpygin 16 Sept 2015	0
	need configuration tips for 1000+ concurrent users Locked	serdar ya 8 Nov 2017	Mathew Gancarz 13 Nov 2017	17
	Databases connection error Locked	selim aktar khan 15 May 2013	Fernando Rocha 18 May 2013	2
	Minimum Server Requirements Locked	Security Quotient 11 July 2019	Visvanath Ratnaweera 15 July 2019	3
	Performance issues when updating a record in Moodle 3.0.3 Locked	SECOMV EMARF 30 Sept 2016	SECOMV EMARF 4 Oct 2016	7
	Performance information from newrelic. Locked	Sebastian Mantilla 3 Oct 2020	Sebastian Mantilla 23 Oct 2020	2
	Problem with email servicie Locked	Sebastian Otero 1 May 2011	Visvanath Ratnaweera 1 May 2011	1
	Course disk usage Locked	Sebastián Espinosa 3 Apr 2009	Elvedin Trnjanin 13 Apr 2009	14
	wicked problem when loading MOODLE Locked	Sebastian Ornazeder 5 Mar 2006	Sebastian Ornazeder 6 Mar 2006	5
	How do I prune mdl_log table? Locked	Sean McKay 10 Jan 2008	Mark Sharp 6 Apr 2016	10
	Setup New Moodle Server Locked	Sean Li 30 Aug 2007	Visvanath Ratnaweera 27 Nov 2007	1
	MySQL Performance Tuning Locked	Sean Keogh 25 May 2004	Bala kumar 9 Sept 2009	2
	Should I use existing Win2003 or plug in Apache Server? Locked	seaghan moriarty 28 Apr 2006	Visvanath Ratnaweera 4 May 2006	7
	Error message when downloading backup file Locked	Scott Bingham 24 Apr 2020	Ken Task 24 Apr 2020	1
	Slow from University server Locked	Scott Bingham 17 Apr 2019	Emma Richardson 17 Apr 2019	1
	Effect of clearing tcm_grade_items_history table? Locked	Scott Bingham 14 Apr 2018	Tim Hunt 14 Apr 2018	1
	tcm_grade_items_history table is HUGE! Locked	Scott Bingham 13 Apr 2018	Chris Fryer 15 Apr 2018	4
	Moodle Crashing Every Night Locked	Scott Tolan 27 May 2015	Jeff White 29 May 2015	15
	Poor performance on Windows virtual server Locked	Scott Christy 1 Aug 2013	AL Rachels 6 Sept 2013	17
	Migrating from Windows VM to Linux VM Locked	Scott Karren 8 Jan 2009	Visvanath Ratnaweera 16 Jan 2009	4
	Performance tuning tips for tuning a VM Locked	Scott Karren 12 Dec 2008	Scott Karren 12 Dec 2008	2
	Moodle hosting cost and time Locked	Scott Karren 22 May 2008	Scott Karren 2 June 2008	7
	Is there a right hosting package? Locked	scott waldman 6 Sept 2007	Michael Penney 6 Sept 2007	2
	Moodle Host With The Most? Locked	scott waldman 19 June 2007	scott waldman 20 June 2007	5
	Backup & Server Performance Major Issue Locked	Scott Grogg 29 Aug 2005	Anil Sharma 8 Oct 2005	49
	Excellent Host - Micfo Locked	Scott Grogg 21 Mar 2005	Erlyn Baack 22 Mar 2005	11
	Database Servers Locked	Scott Karren 20 May 2004	Scott Karren 21 May 2004	1
	Moodle installed with xampp- High CPU usage for 50 concurrent users Locked	Sayak Sarkar 8 Jan 2010	Sayak Sarkar 12 Jan 2010	3
	Apache perfomance issue Locked	Saurabh Makol 2 Apr 2014	james mergenthaler 11 Apr 2014	1
	Moodle 2 on cloud ... Locked	Saumil Trivedi 7 Mar 2012	Saumil Trivedi 16 Mar 2012	3
	Moodle 3.7 Quiz for 15000 concurrent users via Mobile App? Is it possible? Locked	Sathiya Priya 19 Sept 2019	Visvanath Ratnaweera 24 Sept 2019	16
	Hardware 1000 concurrent users Locked	Sathiraju Sunkara 10 July 2020	Visvanath Ratnaweera 10 July 2020	2
	MySQL database (moodle) and SQL-user permitions, need help!! Locked	Saso Skocir 20 Dec 2007	Saso Skocir 20 Dec 2007	0
	quiz conducting 400 users concurrently Locked	sarvesha mv 7 Mar 2018	Moodle Admin 15 Apr 2018	2
	MySQL performance issue Locked	Sarath P 4 Aug 2022	Tim Hunt 5 Aug 2022	1
	3.9.6 calendar affecting performance Locked	Sarah Cotton 25 May 2021	Juan Luis Maestre 5 Jan 2022	12
	multi hosting/vps server expert required Locked	Sarah Jane 23 July 2013	Visvanath Ratnaweera 10 Aug 2013	1
	3 things to do to enhance speed. Locked	Sarah Jane 7 June 2013	David Scotson 17 July 2013	5
	Connection Close versus Keep_Alive? Locked	Sarah King 4 Apr 2004	Sarah King 4 Apr 2004	0
	moodle for digital exam for about 70 students Locked	sara HHH 25 Oct 2018	sara HHH 31 Oct 2018	8
	many users can not login at the same time Locked	sara mdht 18 July 2011	Visvanath Ratnaweera 23 July 2011	2
	Grader Report is too slow with > 100K participants in Moodle 4.1	Santosh Nagargoje 22 Nov 2023	Marcus Green 25 Nov 2023	8
	Could not handle 60 requests at a time for online quiz Locked	Santhosh Chandra 10 June 2017	Usman Asar 11 June 2017	2
	INSUFFICIENT RESOURCES Error Locked	Santhosh Samban 9 Oct 2015	Ken Task 9 Oct 2015	1
	moodle 2.5 performance Locked	Sanjay Pandey 6 Aug 2013	Sanjay Pandey 6 Aug 2013	0
	What may cause a coding error - failed to unserialise data from file. Either failed to read, or ... Locked	Sandy Stockholm 14 June 2018	Albert Ramsbottom 9 July 2018	2
	Moodle 3.9 Performance Locked	Sander Bangma 23 June 2020	Kapila Jayasinghe 3 Mar 2021	26
	Hardware Sizing with Cluster Service Locked	Sanchai Leelahakiat 4 Dec 2013	Albert Ramsbottom 8 Jan 2014	15
	How to reduce the amount of memory that each httpd process takes? Locked	Samuli Karevaara 28 Sept 2006	Samuli Karevaara 18 Dec 2006	1
	Apache 1.3 vs. Apache 2 under heavy usage (on Linux)? Locked	Samuli Karevaara 5 Nov 2004	Samuli Karevaara 20 Apr 2005	1
	How can I improve performance? Locked	samuel h 6 Dec 2013	Howard Miller 6 Dec 2013	1
	Moodle: Load and Speed issues Locked	Samuel Cochran 19 Oct 2005	Samuli Karevaara 28 Oct 2005	26
	Hardware for Moodle, DimDim, Backup and live streaming Locked	Samir Sanghavi 7 Sept 2007	Anil Sharma 12 Oct 2007	3
	Hardware requirements Locked	Samat Kapanov 14 Mar 2020	Samat Kapanov 16 Mar 2020	20
	Moodle Cloud (split from ancient thread) Locked	Samantha Gartner 13 July 2015	Samantha Gartner 13 July 2015	0
	Moodle 3.4 -> 3.5 upgrade time Locked	sam marshall 23 Aug 2018	sam marshall 24 Aug 2018	1
	Strange NFS problem in rare case of deleting/creating same file Locked	sam marshall 23 May 2016	Albert Ramsbottom 26 May 2016	6
	Memcache issues after recent security patches Locked	sam marshall 19 Mar 2015	sam marshall 20 Mar 2015	1
	Moodle 2.51 clean install much slower than Moodle 2.3.2 clean install Locked	Sam Mudle 5 Aug 2013	Sam Mudle 5 Aug 2013	0
	Improving the performance of quizzes Locked	Sam Mudle 9 Nov 2012	Sam Mudle 14 Nov 2012	5
	My "resource use" has spiked 100% after introducing quizzes Locked	Sam Mudle 2 Nov 2012	Sam Mudle 5 Nov 2012	4
	Re: moodle system going down/getting stuck very often (II) Locked	Sam McNeill 31 May 2012	Visvanath Ratnaweera 1 June 2012	5
	Anyway to monitor the health of my moodle hosting service? Locked	Sam Mudle 19 Feb 2012	Derek Chirnside 19 Feb 2012	2
	New e-peen script! Er, I mean, system performance analyser Locked	sam marshall 14 Nov 2010	AL Rachels 25 Dec 2010	12
	Moodle 2.0 performance Locked	sam marshall 11 May 2010	sam marshall 18 May 2010	9
	Performance perspectives - a little script Locked	sam marshall 25 Oct 2006	Najeeb Haider Zaidi 4 Sept 2015	91
	Communication error Locked	Salim Al Waili 16 May 2020	Visvanath Ratnaweera 19 May 2020	3
	Slow file download and playing SCORM videos Locked	Sali Kaceli 7 Oct 2016	Nelson Moller 2 Oct 2017	14
	php 100% high utilization Locked	Sali Kaceli 25 Sept 2012	Visvanath Ratnaweera 26 Sept 2012	8
	(Slow) Login Problems for Specific Users Locked	Sali Kaceli 16 June 2009	Sali Kaceli 29 Sept 2009	6
	Yea.. More sessions questions. Locked	sakai user 23 Dec 2010	sakai user 23 Dec 2010	0
	problem in pages loading Locked	sajad khadem nejad 26 July 2009	sajad khadem nejad 26 July 2009	0
	moodle 1.6 and MySQL 4.1.16 Locked	sajad khadem nejad 8 Apr 2006	sajad khadem nejad 8 Apr 2006	0
	HowTo: Moodledata on separate server Locked	Safeen Shun 16 Apr 2020	Santosh Nagargoje 7 Aug 2020	7
	Caching & Application Cache in Cluster Locked	Saad Zaman 22 Apr 2019	Saad Zaman 1 May 2019	15
	Apache security problem Locked	sa as 25 Jan 2005	Breanndan O'Cinneide 25 Jan 2005	2
	Server configuration for approx 4500 users Locked	S. kavita 26 Sept 2017	S. kavita 26 Sept 2017	0
	Error : Database Connection failed Locked	S B 4 Aug 2020	Visvanath Ratnaweera 4 Aug 2020	2
	Hardware Requirement Locked	S Arvind 19 Mar 2013	Mikołaj Kowalski 5 Apr 2013	2
	Heavy IO problem Locked	Ryan-Neal Mes 25 Nov 2014	Ryan-Neal Mes 27 Nov 2014	8
	Memcached store instance disappears after days Locked	Ryan Chan 20 June 2019	Howard Miller 20 June 2019	1
	Partitioning scheme for Ubuntu Server Locked	Ryan B 10 Aug 2016	Howard Miller 13 Aug 2016	8
	Moodle Running Slow 2.0 (Memory keeps maxing out) Locked	Ryan Nelson 24 Mar 2012	James Richardson 30 Nov 2012	17
	Dell PowerEdge T610 for 3000 users Locked	Ryan Schopp 19 Mar 2012	Visvanath Ratnaweera 23 Mar 2012	2
	Hosting in China for 3000 students Locked	Ryan Schopp 10 Mar 2012	stanley wang 16 June 2012	7