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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
	Moodle 2.4 with Oracle RAC Locked	Antonio Piedras 23 Jan 2013	Simon Story 23 Jan 2013	5
	High availability - MySQL cluster v's replication (II) Locked	Moo pin 22 Jan 2013	Moo pin 22 Jan 2013	0
	performance issue on moodle Locked	Richard Chiha 21 Jan 2013	Howard Miller 22 Jan 2013	4
	Quiz performance with large concurrency Locked	Ray Morris 19 Jan 2013	Howard Miller 21 Jan 2013	5
	How to conduct quiz for 15-20 thousand student in Moodle 2.3 Locked	Dhastha Gheer 18 Jan 2013	David Bezemer 21 Jan 2013	5
	Optimizing for Grade Import and stopping: "Timeout waiting for output from CGI script" Locked	Daniel Lombardo 13 Jan 2013	Daniel Lombardo 17 Jan 2013	4
	Workaround to load files without file.php Locked	Biel Frontera 14 Jan 2013	Simon Story 15 Jan 2013	2
	Moodle 2.3.2 + Postgres 9.0.3 + Quizzes(?) = stale db connections Locked	Mike Kelly 7 Nov 2012	Michael Haskell 15 Jan 2013	2
	The quiz function of moodle 2.3.2 seems to put quite a strain on a server Locked	curt bixel 7 Oct 2012	Michael Haskell 15 Jan 2013	25
	Same application,different hardware,No change in performance Locked	shrikant gakhare 30 Dec 2012	Visvanath Ratnaweera 10 Jan 2013	25
	No performance Improvement after migration to new hardware Locked	shrikant gakhare 28 Dec 2012	shrikant gakhare 10 Jan 2013	7
	Upgrading Moodle (PHP and Mysql) and Hardware for Large IT Company Locked	shrikant gakhare 5 Oct 2012	shrikant gakhare 10 Jan 2013	4
	Performance impact of user profile images? Locked	David Scotson 4 Jan 2013	David Scotson 9 Jan 2013	4
	Looking for a web hosting for moodle. Any recommendation? Locked	Robert Guttenberg 14 Jan 2007	Aaron Edwards 3 Jan 2013	18
	CPU USAGE 100% Locked	roc mehra 19 Dec 2012	Visvanath Ratnaweera 31 Dec 2012	16
	Moodle 2.4 very slow Locked	CP Lau 25 Dec 2012	Visvanath Ratnaweera 26 Dec 2012	3
	Error after months Locked	Dr. Nellie Deutsch 24 Dec 2012	Visvanath Ratnaweera 26 Dec 2012	2
	CPU usage 100% on NoSupportLinuxHosting Locked	Dan O'Reilly 20 Dec 2012	Ken Task 22 Dec 2012	11
	bandwidth, RAM - 50 users Locked	Magnolia Serate 18 Dec 2012	Rick Jerz 20 Dec 2012	10
	My Moodle is gradually running slower Locked	A. John Peters 27 Nov 2012	Abbie Bates 19 Dec 2012	2
	HW specs for Application and Database server Locked	Yulstar Lukimin 17 Dec 2012	Visvanath Ratnaweera 19 Dec 2012	1
	Migrating from LAN to internet Locked	shiva k 3 Nov 2012	Visvanath Ratnaweera 15 Dec 2012	3
	Disabling activity logging Locked	Ben Goodwin 22 June 2005	vancool black 13 Dec 2012	2
	eAccelerator Locked	jonnym m 8 Nov 2012	jason everling 6 Dec 2012	7
	Moodledata Directory Locked	R.T. Brown 4 Dec 2012	Howard Miller 5 Dec 2012	2
	Mirroring /Replication Locked	Jan Willem Smeenk 19 Jan 2007	Visvanath Ratnaweera 30 Nov 2012	6
	Moodle Running Slow 2.0 (Memory keeps maxing out) Locked	Ryan Nelson 24 Mar 2012	James Richardson 30 Nov 2012	17
	2 Web Server to One Mysql Locked	Shay Hanna 26 Nov 2012	Simon Story 27 Nov 2012	4
	Two recent blog posts on performance Locked	Visvanath Ratnaweera 9 Nov 2012	Frederic Nevers 19 Nov 2012	2
	Slow speed linked to scripting problem? Locked	Ali West 15 Nov 2012	Ali West 19 Nov 2012	3
	700 Concurrent users Locked	jaffa jay 14 Nov 2012	julian maya 16 Nov 2012	12
	Performance problems in Moodle 2.3 Locked	Esteban Sánchez 13 Nov 2012	Esteban Sánchez 15 Nov 2012	9
	driver oci8 for Oracle Locked	Esteban Sánchez 15 Nov 2012	Esteban Sánchez 15 Nov 2012	0
	Improving the performance of quizzes Locked	Sam Mudle 9 Nov 2012	Sam Mudle 14 Nov 2012	5
	Moving from V2.0.x to 2.3.2 Locked	Humanage SRL 23 Oct 2012	Tom T 12 Nov 2012	8
	I use eAccelerator 0.9.6.1 but cache scripts = 1 all the time Why? Locked	Frankie Kam 14 Jan 2011	jason everling 12 Nov 2012	12
	MySQL Master-Master Replication Locked	jason everling 7 Nov 2012	jason everling 10 Nov 2012	4
	requirements Locked	Nitharshanaa Shanmuganathan 9 Nov 2012	Nitharshanaa Shanmuganathan 9 Nov 2012	2
	Any suggestions for a new server setup? Locked	Eric Smith 3 Nov 2012	Grant Mucha 8 Nov 2012	3
	general Locked	Nitharshanaa Shanmuganathan 7 Nov 2012	Nitharshanaa Shanmuganathan 8 Nov 2012	2
	CAS Browser Looping Locked	Michael Haskell 25 Oct 2012	jason everling 7 Nov 2012	4
	My "resource use" has spiked 100% after introducing quizzes Locked	Sam Mudle 2 Nov 2012	Sam Mudle 5 Nov 2012	4
	Extremely Slow Locked	Gerrit Anderson 4 Nov 2012	Visvanath Ratnaweera 4 Nov 2012	1
	Configuring Moodle with Apache2 load balancer Locked	Dhastha Gheer 2 Nov 2012	Matteo Scaramuccia 3 Nov 2012	3
	Need your advice. Locked	Ben S 1 Nov 2012	Ben S 2 Nov 2012	2
	High amount of data traffic Locked	Daran Price 5 Oct 2012	Daran Price 26 Oct 2012	5
	Google Bots Locked	Chris Meyer 26 Oct 2012	Chris Meyer 26 Oct 2012	1
	mod_bwshare setting for moodle Locked	Frank B 25 Oct 2012	Frank B 25 Oct 2012	0
	Varnish Config Locked	Justin Hunt 4 Oct 2012	dan attwood 22 Oct 2012	2
	Moodle bandwidth Locked	Nitharshanaa Shanmuganathan 18 Oct 2012	Nitharshanaa Shanmuganathan 19 Oct 2012	9
	VPS or dedicated Server for Moodle ? Locked	Aurélien Vatinel 13 Oct 2012	Visvanath Ratnaweera 15 Oct 2012	3
	Quizzes freeze everything up Locked	Troy Garrett 12 Oct 2012	Emma Richardson 13 Oct 2012	9
	Best Moodle version for Linux Server Locked	John Araújo 12 Oct 2012	Visvanath Ratnaweera 12 Oct 2012	2
	Redhat or SUSE? 32 bit or 64 bit? Locked	Tabitha Parker (was Roder) 16 Aug 2012	Visvanath Ratnaweera 11 Oct 2012	6
	Best Linux distro for Moodle Locked	John Araújo 11 Oct 2012	Visvanath Ratnaweera 11 Oct 2012	4
	Pollyanna question Locked	Derek Chirnside 27 Sept 2012	Michael Spall 11 Oct 2012	5
	Site toooooooo slow Locked	Annie Price 9 Oct 2012	Visvanath Ratnaweera 10 Oct 2012	9
	Further slowdown and incompatability in move from 2.2. to 2.3 Locked	Richard van Iwaarden 25 Sept 2012	Visvanath Ratnaweera 9 Oct 2012	16
	Mac Mini Server Locked	Conor Power 6 Feb 2012	Jeffrey Best 9 Oct 2012	5
	Timeout problems when editing in Moodle 2.2.3 Locked	Gary Lebowitz 27 Sept 2012	Gary Lebowitz 9 Oct 2012	8
	Database server of Moodle 2.3.1 is a bottleneck Locked	CP Lau 16 Sept 2012	Simon Story 8 Oct 2012	14
	Extra PHP memory limit options Locked	Matthew Switlik 3 Oct 2012	Ken Task 3 Oct 2012	1
	Delay between quiz question pages (how do I eliminate it?) Locked	A Guy 30 Sept 2012	A Guy 3 Oct 2012	5
	Moodle Performance Test on JMeter Locked	Elavarasan MS 1 Oct 2012	Elavarasan MS 1 Oct 2012	0
	php 100% high utilization Locked	Sali Kaceli 25 Sept 2012	Visvanath Ratnaweera 26 Sept 2012	8
	Slowdown and incompatability in move from 2.2. to 2.3 Locked	Bill Steele 22 Sept 2012	Visvanath Ratnaweera 25 Sept 2012	5
	Slowdown after 1.9 -> 2.2 migration Locked	Tamas Csillag 20 Sept 2012	Tamas Csillag 21 Sept 2012	2
	Allocating more bandwidth Locked	curt bixel 21 Sept 2012	Visvanath Ratnaweera 21 Sept 2012	1
	Intermittent performance problems Locked	Simon Cole 18 Sept 2012	Simon Cole 19 Sept 2012	4
	Slow disk reads with Linux VMs, Moodle 1.9 Locked	Gregor Ronald 13 Sept 2012	Matt Sharpe 19 Sept 2012	10
	"MySQL server has gone away" Locked	Dallen Farmer 17 Sept 2012	Visvanath Ratnaweera 19 Sept 2012	8
	slow site admin loading Locked	Tod Anderson 12 Sept 2012	Tod Anderson 18 Sept 2012	2
	Slow page loading in Moodle 2.3.1? Try this: Locked	Paul Nijbakker 7 Sept 2012	Visvanath Ratnaweera 16 Sept 2012	1
	Hardware recommendations for my new moodle hosting Locked	richa rathore 3 Sept 2012	Dan Marsden 11 Sept 2012	6
	no cachetype and rcache option in admin Locked	CCManager DDeveloper 9 Jan 2011	Karen Williams 10 Sept 2012	6
	Separate MSSQL database server? Locked	Richard Karel 31 Aug 2012	Visvanath Ratnaweera 31 Aug 2012	2
	Extremely slow SCORM module performance, pluginfile retrieval, but only on a specific course and ... Locked	Mathew Gancarz 16 Aug 2012	Mathew Gancarz 31 Aug 2012	15
	Upgrading moodle performance - activities and resources deinstallation. Locked	Marek Neuman 30 Aug 2012	Marek Neuman 30 Aug 2012	2
	moodle on shared hosting - keep killed Locked	rendy kurniawan 29 Aug 2012	Frederic Nevers 30 Aug 2012	1
	Suhosin problem Locked	Emma Richardson 29 Aug 2012	Emma Richardson 29 Aug 2012	1
	apache hang Locked	boke xu 28 Aug 2012	boke xu 28 Aug 2012	2
	Moodle developer needed for tablet Moodle Locked	Diana Muir 23 Aug 2012	Visvanath Ratnaweera 24 Aug 2012	8
	Advice Locked	Gary Moncrieff 20 Aug 2012	Gary Moncrieff 21 Aug 2012	2
	Replication or Clustering Locked	Troy Garrett 6 Aug 2012	Eric Long 16 Aug 2012	3
	cron.php leads to a very high cpu usage Locked	hugo joe 4 July 2012	Visvanath Ratnaweera 11 Aug 2012	10
	load user's picture very slow Locked	Shwu-Fen Kuo 3 Aug 2012	Shwu-Fen Kuo 10 Aug 2012	17
	500 concurrent users on vitualization Locked	Florin Cazanaru 19 July 2012	Visvanath Ratnaweera 8 Aug 2012	26
	Moodle 2.2 on apache working with MS SQL db - problem with restoring the course Locked	Jaroslaw Jozwik 3 Feb 2012	Gregor McNish 6 Aug 2012	4
	The longer the day goes it seems to get slower Locked	Mr. Marc 2 Aug 2012	Ken Task 5 Aug 2012	20
	Clustering test Locked	Lawrence N 24 June 2012	Visvanath Ratnaweera 1 Aug 2012	1
	Error: Database connection failed after memory used up Locked	hugo joe 2 July 2012	Visvanath Ratnaweera 30 July 2012	6
	About eAccelerator Cached Scripts Locked	red tiger 22 May 2012	AL Rachels 18 July 2012	6
	Browse list of users Locked	Mei Ling 13 July 2012	AL Rachels 17 July 2012	1
	Moodle under-performance Locked	Cathal O'Riordan 19 June 2012	Visvanath Ratnaweera 8 July 2012	5
	Easy quick performance boost for Moodle! Locked	Grant Mucha 11 Apr 2012	Visvanath Ratnaweera 1 July 2012	3
	Proposed architecture for Moodle 2.x Locked	Cathal O'Riordan 1 Mar 2012	Andrew Lyons 27 June 2012	16
	Moodle Host Recomendations Locked	Alan Reitzel 11 May 2012	Sam Mudle 23 June 2012	10
	After upgrading from Moodle 2.2.2 to 2.2.3, the system slowed down Locked	David Jiménez 25 May 2012	Visvanath Ratnaweera 22 June 2012	1
	Recommended Server Hardware: 600 users, Moodle 2.2 Locked	James Johnston 20 June 2012	Visvanath Ratnaweera 22 June 2012	1
	Slow Moodle Locked	Rob Monk 14 Feb 2012	Richard Jones 21 June 2012	16