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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
	What Size Should ramdisk/tmpfs Be for 'temp' and 'cache' ? Locked	Paul Lindgreen 5 Mar 2019	Howard Miller 20 Mar 2019	11
	Data Privacy and Large Moodles Locked	David Dixon 8 Mar 2019	David Dixon 12 Mar 2019	2
	XAMPP on Windows Server 2012 running in production Locked	Michael Hankins 9 Mar 2019	Ken Task 16 Mar 2019	19
	Moodle performance issues with mysql Locked	Sreepathy T L 10 Mar 2019	Chris Fryer 18 Feb 2020	8
	10K Users - 2 hours Exam Locked	uk nites 10 Mar 2019	Séverin Terrier 12 Mar 2019	2
	Can anyone share a performant Redis cache configuration? Locked	wz z 13 Mar 2019	Howard Miller 13 Mar 2019	2
	Moodle Performance Issue with 4 users Locked	Paul Young 15 Mar 2019	Paul Young 20 Mar 2019	22
	Cluster setup Help Locked	Simon Powell 22 Mar 2019	Visvanath Ratnaweera 29 Mar 2019	19
	Moodle + AWS EFS + filecachesd is it recommended? Locked	Christos Savva 2 Apr 2019	Ben Kahn 31 May 2019	2
	Certain pages loading very slow Locked	Albert R. 9 Apr 2019	Sarang Nair 6 Aug 2019	3
	Slowest queries are inserting single row into mdl_sessions Locked	Diane Soini 9 Apr 2019	Jerry Lau 17 Apr 2019	14
	Flushing all the caches causes a fatal error Locked	Service Usagers du Numérique 12 Apr 2019	Service Usagers du Numérique 13 Apr 2019	2
	Users bounced off the server? Locked	heli g 12 Apr 2019	Jerry Lau 13 Apr 2019	2
	External database log - will it copy existing? Locked	Diane Soini 15 Apr 2019	Howard Miller 16 Apr 2019	2
	Slow from University server Locked	Scott Bingham 17 Apr 2019	Emma Richardson 17 Apr 2019	1
	Performance with 2500 concurrent users Locked	Stephen Tod 18 Apr 2019	Howard Miller 21 Apr 2019	5
	configuring redis and APCu Locked	stefan weber 18 Apr 2019	Luis de Vasconcelos 22 May 2019	3
	Caching & Application Cache in Cluster Locked	Saad Zaman 22 Apr 2019	Saad Zaman 1 May 2019	15
	Redis cache store instance Locked	Luis de Vasconcelos 23 Apr 2019	Jeff White 24 Apr 2019	1
	Moodle 3.4.2 Performance Locked	sheikh usman 30 Apr 2019	Visvanath Ratnaweera 1 May 2019	2
	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
	Redis Cache Lock Issue Locked	Eric Katchan 2 May 2019	Eric Katchan 3 May 2019	2
	Sudden Proxy Error, no recent system changes Locked	Tiffany Morgan 14 May 2019	Howard Miller 26 Feb 2020	10
	Admin Pages Slow (10-20 sec page loads) Locked	Tom Palaz 14 May 2019	Luis de Vasconcelos 22 May 2019	5
	Tuning FCGI and Apache for Moodle Locked	Stephen Bourget 18 May 2019	Simon Lewis 4 Feb 2020	12
	Moodledocs: Summary of cache lock instances Locked	Luis de Vasconcelos 22 May 2019	Tomasz Muras 30 May 2019	3
	Globally distributed installation Locked	Simon Lewis 22 May 2019	Simon Lewis 24 May 2019	10
	Simple global search Locked	Michelle Melton 28 May 2019	Michelle Melton 28 May 2019	0
	General performance question Locked	Heinz Felfe 5 June 2019	Rick Jerz 8 June 2019	15
	Recent experiences with GlusterFS? Locked	Noveck Gowandan 6 June 2019	kfrydrys ILIM 2 Apr 2020	2
	Redis and stunnel Locked	Mark Johnson 14 June 2019	Mark Johnson 11 Dec 2019	4
	Moodle scalability Locked	Thinh Dang 15 June 2019	Ray Hinton 20 June 2019	3
	Updating Browsers and OS for better Moodle performance Locked	Mario Gharib 17 June 2019	Ken Task 17 June 2019	1
	How to stress test Moodle? Locked	Mario Gharib 17 June 2019	Jeff White 18 June 2019	4
	Memcached store instance disappears after days Locked	Ryan Chan 20 June 2019	Howard Miller 20 June 2019	1
	Too many files problem Locked	Steve Massicotte 20 June 2019	Steve Massicotte 27 June 2019	11
	Slow Moodle in Thin Clients Locked	Alec Jordan Buencamino 24 June 2019	Alec Jordan Buencamino 24 June 2019	0
	Too many opened sessions on Moodle 2.7.20 Locked	Cristian Santibañez 3 July 2019	Andrew Lyons 4 July 2019	2
	How do i make site online/public? Locked	Marg Smith 10 July 2019	Howard Miller 10 July 2019	5
	Minimum Server Requirements Locked	Security Quotient 11 July 2019	Visvanath Ratnaweera 15 July 2019	3
	Very Slow Site after migrating to a VPS Locked	Leah Lever 16 July 2019	Ryan Merphy 19 July 2019	2
	Cache store performance reporting Locked	Andrey Kladiti 22 July 2019	Anze Pratnemer 17 Apr 2020	5
	Moodle Architecture Calculator Locked	Noveck Gowandan 26 July 2019	Jeff White 2 Aug 2019	13
	External log store and performance Locked	Mark van Hoek 31 July 2019	Jeff White 2 Aug 2019	2
	Redis caching and unix socket configuration Locked	Alain Raap 5 Aug 2019	Alain Raap 19 Aug 2019	14
	Effect of Debian Buster (PHP 7.3) on Moodle performance? Locked	Visvanath Ratnaweera 6 Aug 2019	Visvanath Ratnaweera 6 Aug 2019	0
	Bad RAM-use performance from get_records [MDL-66327] Locked	Tim Hunt 6 Aug 2019	Andrew Lyons 8 Aug 2019	1
	Moodle REALLY slow with 20 concurrent users Locked	Oliver Boyers 7 Aug 2019	Visvanath Ratnaweera 9 Aug 2019	12
	Diagnosing issue with Moodle caching Locked	Alistair Spark 9 Aug 2019	Sarra Lev 18 Mar 2020	25
	Extending browser cache Locked	Benjamin Bøndergaard 13 Aug 2019	Benjamin Bøndergaard 14 Aug 2019	3
	Anybody using a load balancer? Locked	Howard Miller 19 Aug 2019	Jeff White 23 Aug 2019	7
	Quizzes Loads Slow - Other functions working fine Locked	Shelly Vaughan 27 Aug 2019	Mei Ling 4 Oct 2019	5
	Help! Database server CPU maxed out Locked	Ben Kahn 27 Aug 2019	Jerry Lau 12 Sept 2019	14
	Server load testing Locked	Abu Ali 29 Aug 2019	Visvanath Ratnaweera 1 Sept 2019	2
	I/O File Performance Locked	Coco E. 29 Aug 2019	Visvanath Ratnaweera 17 Sept 2019	10
	One node seems to behave worse than others. Locked	Ángel Orosa 2 Sept 2019	Ángel Orosa 4 Sept 2019	4
	Recommendation of SQLTunner Locked	Abu Ali 4 Sept 2019	Ken Task 4 Sept 2019	2
	Hardware /performance suggestion Locked	Dorian C 13 Sept 2019	Dorian C 1 Jan 2020	13
	Unable to access "New Event" moodle calendar in IE browser. Locked	priya a 13 Sept 2019	priya a 17 Sept 2019	5
	installed moodle 3.4.1 and it is slow. Locked	TokiyoRio TokiyoRio 18 Sept 2019	Colin Fraser 19 Sept 2019	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
	Replicatring the 'Plugins Overview' page via SQL Configurable Reports block. Locked	VoltarMendoza VoltarMendoza 21 Sept 2019	VoltarMendoza VoltarMendoza 21 Sept 2019	0
	requirments for moodle server Locked	Mikas Krukauskas 24 Sept 2019	Visvanath Ratnaweera 25 Sept 2019	5
	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
	Moodle Caching Config screen Locked	Doneld Anderson 25 Sept 2019	Howard Miller 25 Sept 2019	1
	Audio player of audio file doesn't load. Locked	Russell Thomson 3 Oct 2019	Michael Farrell 12 Mar 2020	1
	Please share your task processing settings! Locked	Howard Miller 10 Oct 2019	Howard Miller 31 Oct 2019	13
	database is overloaded Locked	Abu Ali 14 Oct 2019	Howard Miller 15 Oct 2019	4
	High DB Connections [State sleep] Locked	Christos Savva 15 Oct 2019	Max Maccluer 15 Sept 2020	10
	AWS and EFS page load Locked	Raimundo Farrapo 17 Oct 2019	Michael Spall 18 Oct 2019	3
	Ghostscript test failing when database on an external server Locked	Oliver Boyers 18 Oct 2019	Oliver Boyers 21 Oct 2019	2
	Clustered Memcached Kubernetes Deployment with McRouter Locked	Mark Oxley 22 Oct 2019	Dan Marsden 25 Oct 2019	18
	Memory Idle Locked	Toni Sutoni 22 Oct 2019	Howard Miller 22 Oct 2019	3
	Can moodle support quiz with 600 concurrent users and 2000 concurrent users learning in other ... Locked	Nawaphon K.bawon 23 Oct 2019	Nawaphon K.bawon 28 Oct 2019	6
	2500 concurrence Users Locked	Joaquin Pretell 24 Oct 2019	Brian Merritt 31 Oct 2019	8
	Windows 2008 R2 FASTCGI_RAPID_FAILURE_PROTECTION Locked	David H 2 Nov 2019	David H 5 Nov 2019	4
	Problem with a load balancer in AWS Locked	Joel Szwarcbort 4 Nov 2019	Howard Miller 4 Nov 2019	1
	Moodle sessions timing out Locked	Adam Norwood 8 Nov 2019	Thorsten Bartel 14 Nov 2019	12
	Is my benchmark score any good? Locked	Ardian Deari 13 Nov 2019	Ardian Deari 17 Nov 2019	9
	Is this VPS, 3 vCPU / 3 GB RAM / 100 GB SSD / Linux Server, sufficient for 50 students? Locked	Jason Coetzee 14 Nov 2019	Rick Jerz 14 Nov 2019	6
	can i add SQL index to speedup a sql query without issue on moodle database structure ? Locked	REMI PICARD (substitute) 19 Nov 2019	Howard Miller 19 Nov 2019	1
	New Moodle Installation Locked	Paul Smith 19 Nov 2019	AL Rachels 21 Nov 2019	7
	[Moodle Benchmark] Is it applicable to non-x86 architectures? Locked	Visvanath Ratnaweera 21 Nov 2019	AL Rachels 10 Mar 2020	15
	Preparation, Requirements and Scalability Locked	Francisco Orellana 25 Nov 2019	Francisco Orellana 4 Dec 2019	3
	views on performance related issues when using embedded powerpoints in a moodle course Locked	altan ahmet 2 Dec 2019	James Steerpike 12 Dec 2019	6
	my moodle website load pages in very slow Locked	amine brahim 6 Dec 2019	James Steerpike 12 Dec 2019	20
	Benchmark result Locked	arnel marquez 7 Dec 2019	Visvanath Ratnaweera 9 Dec 2019	3
	Config Memcached Locked	Dennis V 14 Dec 2019	Thorsten Bartel 9 Jan 2020	15
	Improving the performance of the moodle database Locked	Juan Luis Maestre 15 Dec 2019	Juan Luis Maestre 17 Dec 2019	8
	mdl_message table is no longer used? Locked	Charles Avg 20 Dec 2019	Andrew Lyons 2 Jan 2020	2
	[3.8] - Syntax error from error_log (Admin/cli) Locked	Thomas Renard 6 Jan 2020	Howard Miller 7 Jan 2020	4
	Memcached - Store not ready Locked	Anze Pratnemer 10 Jan 2020	Anze Pratnemer 10 Jan 2020	2
	Moodle performance - examples of configurations Locked	Jukram Aspalanta 10 Jan 2020	Ricardo Caiado 28 June 2020	21
	[3.8] - ERR_EMPTY_RESPONSE Locked	Thomas Renard 12 Jan 2020	Thomas Renard 14 Jan 2020	3
	interpret image related to performance of a course. Locked	Gabriel Fernandez Mora 13 Jan 2020	Gabriel Fernandez Mora 13 Jan 2020	0
	Moodle backup performance Locked	Tyler Bogdan 14 Jan 2020	Visvanath Ratnaweera 28 Jan 2020	34
	Recent Degredation on Moodle Performance Locked	Tim Gildersleeve 15 Jan 2020	Tim Gildersleeve 16 Jan 2020	5
	Server Slowness is causing us badly Locked	Shuvendu Pattanayak 16 Jan 2020	Visvanath Ratnaweera 17 Jan 2020	4
	Moodle Docker on a large AWS cluster - help appreciated Locked	Dom F 16 Jan 2020	Howard Miller 17 Jan 2020	4
	[3.8] - PHP memory limit / cache problem / shared hosting Locked	Thomas Renard 19 Jan 2020	Howard Miller 20 Jan 2020	1