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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
	Serious Performance hit on login & user profiles Locked	Michael Hughes 18 June 2010	Bartosz Cisek 25 June 2010	1
	Sessions on memcached? Locked	Dan Poltawski 17 June 2010	James McLean 21 June 2010	4
	PostgreSQL server issues Locked	Worth Bishop 29 Jan 2010	Worth Bishop 18 June 2010	3
	Add Edit Course load problem Locked	Ansley Higgins 10 June 2010	Howard Miller 10 June 2010	1
	XCache with Moodle Locked	Ângelo Rigo 18 June 2008	Zvonko Martinović 10 June 2010	8
	noob question : How to increase the extra php memory ? Locked	Mireille Raad 9 June 2010	Mireille Raad 9 June 2010	0
	Re: Delivery Status Notification (Failure) Locked	danish haroon 5 Apr 2010	Sean Farrell 7 June 2010	1
	Which Linux? Locked	Steve Squires 13 May 2010	Mary Evans 7 June 2010	22
	Moodle 2.0 performance Locked	sam marshall 11 May 2010	sam marshall 18 May 2010	9
	High performance / High availability architecture for Moodle 2.0? Locked	Judy Lo 20 Apr 2010	James McLean 13 May 2010	4
	Convert innoDB back to MyISAM Locked	HJWUCGA INC. 29 Mar 2010	HJWUCGA INC. 11 May 2010	16
	Need help regarding high availability Locked	Mamdouh Tawfik 30 Apr 2010	Federico Zurro 6 May 2010	5
	Participants in meta courses aggregate very slowly Locked	Christian Zick 20 Apr 2010	Christian Zick 5 May 2010	2
	High CPU usage Locked	José de Jesús 14 Apr 2010	José de Jesús 26 Apr 2010	10
	PHP Memory Limit for 1.9.8 Locked	Jon Witts 15 Apr 2010	Jon Witts 21 Apr 2010	6
	About replicating/mirroring Moodle Database Locked	Ashraf Aziz 18 Apr 2010	Tim Hunt 19 Apr 2010	1
	Minium hardware requeriments for... Locked	Tomas Perez Socava 14 Apr 2010	Visvanath Ratnaweera 19 Apr 2010	8
	VPS install Locked	Lisandro Laura 10 Apr 2010	Eduardo Veliz 15 Apr 2010	4
	Disabling HTTPs Security from within Locked	josh squires 22 July 2007	Reinaldo Programmer PhP 15 Apr 2010	2
	How to install eAccelerate on Ubuntu 8.04? Locked	Roland Sherwood 20 Sept 2009	Mike Haudenschild 13 Apr 2010	8
	Slow page load, Why? or somethig else? Locked	hugo joe 29 Mar 2010	Visvanath Ratnaweera 4 Apr 2010	1
	Move from Shared to VPS...good move? Locked	Erlyn Baack 20 Aug 2009	Erlyn Baack 30 Mar 2010	4
	2 fast processors or 4 slower ones given SATA drives? Locked	greg mushial 23 Mar 2010	Martín Langhoff 29 Mar 2010	8
	Moodle 1.9.7 and Clustering Locked	Noveck Gowandan 27 Mar 2010	Noveck Gowandan 27 Mar 2010	0
	Moodle initial load is very slow on my linux server Locked	Richard Proudfoot 24 Mar 2010	Visvanath Ratnaweera 25 Mar 2010	2
	Where to throw the new/extra memory (usefully)? Locked	greg mushial 23 Mar 2010	Henning Bostelmann 24 Mar 2010	7
	Apache Memory Leak Locked	Brant Peterson 8 Feb 2008	Mark Hilliard 23 Mar 2010	27
	Moodle and Content Distribution Networks (CDNs) Locked	corprew reed 23 Mar 2010	Ken Gibson 23 Mar 2010	3
	Large scale Moodle Host Questions Locked	joe sumpter 16 Sept 2009	Lindley Bailey 22 Mar 2010	20
	What is the best isolation level for MySql using InnoDB Locked	Piotr Kochanski 16 Mar 2010	Tim Hunt 16 Mar 2010	1
	How to fix admin page Fatal Error Locked	Robin Watts 15 Mar 2010	Robin Watts 16 Mar 2010	2
	Advice installing Moodle on a VM Locked	Jamie Sawyer 3 Mar 2010	Ebenezer Le Page 10 Mar 2010	11
	eAccelerator error and cache type setup Locked	Veronica Bendersky 9 Mar 2010	Ken Gibson 10 Mar 2010	18
	PHP 5.2.5 performance Locked	Lionel Redelinghuys 3 Mar 2010	Howard Miller 5 Mar 2010	1
	News instalation (20k registered users / 1k concurrent users) Locked	Renato Jr 26 Nov 2009	Valery Fremaux 27 Feb 2010	14
	E-learning system for government ( need urgent help) Locked	ruba ruba 19 Feb 2010	Jason Jolaoso 25 Feb 2010	6
	Could not insert record info in database. Locked	Neelima Ramesh 4 Jan 2010	Visvanath Ratnaweera 24 Feb 2010	1
	Advice on New Moodle Setup... Locked	Aidan Hammond 19 May 2006	Doris Johnson 22 Feb 2010	6
	Automatically delete users who never login Locked	chris engelsma 21 Jan 2010	Dale Davies 22 Feb 2010	5
	SELECT COUNT query really bringing down performance Locked	Shimron Trammell 27 Jan 2010	Henning Bostelmann 20 Feb 2010	8
	lighttd vs. apache Locked	Maik Riecken 3 Nov 2007	George Varghese 20 Feb 2010	5
	Apache crashes due to PHP out of memory error Locked	Mohan V 15 May 2009	Henning Bostelmann 20 Feb 2010	13
	How do I turn logging off? Locked	Bill Parsons 18 Feb 2010	Bill Parsons 18 Feb 2010	0
	Cache type setting under performance Locked	Doris Johnson 16 Feb 2010	Doris Johnson 16 Feb 2010	0
	Hosting - I'm so lost Locked	Mark Augias 16 Feb 2010	Michael Penney 16 Feb 2010	3
	Moodle virtual server/machine Locked	Greg Hayden 27 Feb 2008	Leo Dil 11 Feb 2010	16
	Large flash based site (was "Scaleablity of Moodle") Locked	Paul Ricketts 3 Feb 2010	Howard Miller 9 Feb 2010	2
	OS and RAID questions for move from VM to real box Locked	Andy Hawkins 29 Jan 2010	Andy Hawkins 3 Feb 2010	2
	Servers, RAID, failover, etc. Locked	John Donaldson 2 Mar 2006	CHENG Alan 27 Jan 2010	31
	User data - question Locked	Juan Estrada 27 Jan 2010	Maryel Mendiola 27 Jan 2010	1
	clarification on browsing/concurrent users Locked	Melissa Benson 21 Jan 2010	Bob Hoagland 26 Jan 2010	3
	Performance problems with 50 concurrent users Locked	Harmeet Saini 13 Jan 2010	Howard Miller 26 Jan 2010	3
	Current Server = 5 users max... need a new server? Locked	Josh Jones 8 Jan 2010	Marcus Green 26 Jan 2010	9
	eAccelerator setting causes blank pages Locked	Sileet A 11 May 2007	Dale Davies 20 Jan 2010	19
	MySQL configuration Locked	Jesús Martín 19 Jan 2010	Noveck Gowandan 19 Jan 2010	1
	MySQL locking up Locked	Eric Kemsley 12 Jan 2010	Eric Kemsley 13 Jan 2010	7
	MYSQL UTF-8 Locked	Nick Oliver 13 Jan 2010	Nate Hartmann 13 Jan 2010	1
	How many students/participants will moodle hold for a continued ongoing course? Locked	Kimberly Dawn 13 Jan 2010	Kimberly Dawn 13 Jan 2010	0
	easy data upload Locked	Tomislav Negulić 12 Jan 2010	Tomislav Negulić 12 Jan 2010	0
	Moodle installed with xampp- High CPU usage for 50 concurrent users Locked	Sayak Sarkar 8 Jan 2010	Sayak Sarkar 12 Jan 2010	3
	Any limits on gradebook export? Locked	Ebenezer Le Page 12 Jan 2010	Ebenezer Le Page 12 Jan 2010	0
	Moodle Clustering Locked	Lee Procter 14 Dec 2009	Visvanath Ratnaweera 9 Jan 2010	1
	Using My Moodle...space usage Locked	Ellen Kinsel 18 Dec 2009	Dale Davies 7 Jan 2010	2
	Parts of Moodle and the home page load very slowly Locked	James Marshall 21 Aug 2007	Daniel Bailey 6 Jan 2010	9
	course Locked	swati c 24 Dec 2009	James Jameson 30 Dec 2009	1
	InnoDB vs. MyISAM Locked	Rui Ruas 24 Dec 2009	Rui Ruas 27 Dec 2009	4
	Fortigate Virtual IP and Moodle NAT Problems Locked	Matt Stavert 15 Sept 2007	Bob Hoagland 25 Dec 2009	5
	Moodle causing a high load on the server Locked	Marc Ramis Llorca 22 Dec 2009	Glenys Hanson 23 Dec 2009	2
	Cloud Sites (Hosting) with Rackspace? Locked	William Tan 14 Dec 2009	William Tan 14 Dec 2009	0
	1000 + Users Locked	Anandarup Kar 30 Nov 2009	Anandarup Kar 14 Dec 2009	3
	Conducting Quiz for 500 users at the same time in Moodle Locked	Meganathan Ramasamy 8 Dec 2009	Tim Hunt 10 Dec 2009	4
	Apache stops processing Locked	Renato Jr 9 Dec 2009	Greg Lund-Chaix 10 Dec 2009	3
	Specs for Moodle Server running on Windows Server 2003 Locked	John McLernon 8 Dec 2009	Visvanath Ratnaweera 10 Dec 2009	1
	Mac Mini server usable ? Locked	kenny Poulsen 20 Nov 2009	Ralf Krause 2 Dec 2009	3
	RAM and RAID and concurrent users Locked	J Fernandes 29 Oct 2009	Greg Lund-Chaix 28 Nov 2009	3
	New section in the coding guidelines about performance Locked	Tim Hunt 26 Nov 2009	Tim Hunt 26 Nov 2009	0
	Moodle and Postgres: Performance problems Locked	Marcelo Lopes 7 Nov 2009	Penny Leach 26 Nov 2009	3
	OS Upgrade from RH EL 4.2 to RH EL 4.7 Locked	Pramita Aher 25 Nov 2009	Tim Hunt 26 Nov 2009	1
	Serious SQL query performance problem with table mdl_grade_grades Locked	Marcelo Lopes 26 Nov 2009	Marcelo Lopes 26 Nov 2009	0
	Admin Account slow performance Locked	Jason Rinne 2 July 2009	Tim Geyer 25 Nov 2009	7
	501 Internal Errors w/ Upload and Download Locked	Daniel Chuhta 24 Nov 2009	Daniel Chuhta 24 Nov 2009	0
	Cost of Moodle Locked	Deleted user 18 Nov 2009	Visvanath Ratnaweera 22 Nov 2009	9
	Connection between database and web servers Locked	Guy Baxter 20 Nov 2009	Visvanath Ratnaweera 22 Nov 2009	2
	JDK Version Locked	Ray J 21 Nov 2009	Tim Hunt 21 Nov 2009	1
	MoodleData Locked	Guy Baxter 20 Nov 2009	Scott Elliott 20 Nov 2009	1
	Connection limit reached? Locked	Jason Edwards 16 Nov 2009	Ashley Holman 20 Nov 2009	1
	Possible inefficient cron job query with mdl_grade_grades_history table Locked	Wen Hao Chuang 20 Nov 2009	Wen Hao Chuang 20 Nov 2009	2
	Requirements for a scalable platform Locked	Gabriel Del Signore 16 Sept 2009	Visvanath Ratnaweera 19 Nov 2009	1
	High CPU Load, ongoing issues Locked	Adam Murray 18 Nov 2009	Greg Lund-Chaix 19 Nov 2009	9
	phpxref cannot get past output_dir problem Locked	HJWUCGA INC. 19 Nov 2009	HJWUCGA INC. 19 Nov 2009	0
	Moodle Server Performance Locked	Alex DePena 14 Nov 2009	Alex DePena 17 Nov 2009	1
	How much will it cost to implement a Moodle system Locked	Deleted user 16 Nov 2009	Tim Hunt 16 Nov 2009	2
	Very slow on localhost on my PC Locked	Kev Richards 14 Nov 2009	Kev Richards 14 Nov 2009	0
	Server still running HIGH CPU Locked	Ryan Kelley 21 Oct 2009	Ryan Kelley 13 Nov 2009	21
	Load balancing Locked	Girish Mulchandani 24 Oct 2009	Visvanath Ratnaweera 10 Nov 2009	4
	High CPU usage after Upgrade to 1.9.6+ Locked	Breno Jacinto 7 Nov 2009	Breno Jacinto 9 Nov 2009	2
	HIGH CPU USAGE BY MYSQL WITH A HUGE mdl_sessions2 TABLE Locked	hugo joe 30 Oct 2009	hugo joe 5 Nov 2009	2
	Location of sessions, cache, and temp Locked	Nate Baxley 2 Nov 2009	Nate Baxley 2 Nov 2009	0
	memcached installation Locked	Noveck Gowandan 27 Oct 2009	Noveck Gowandan 29 Oct 2009	1
	Moodle replication Locked	Dave van Suilichem 28 Aug 2009	Greg Baskind 28 Oct 2009	2