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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
	Cron in a Cluster Locked	R.T. Brown 19 Apr 2013	R.T. Brown 20 Apr 2013	3
	Database Overload Locked	allen haney 18 Apr 2013	Howard Miller 20 Apr 2013	13
	Moodle site sometimes very slow to load and log in Locked	Alex Greene 17 Apr 2013	Alex Greene 19 Apr 2013	3
	Cron- slow when manually run, won't work from a scheduled task Locked	Heather P 11 Apr 2013	Heather P 19 Apr 2013	2
	Moodle 2.4 session data in memcached Locked	Robert Zakrocki 11 Apr 2013	Anna Jonna Ármannsdóttir 29 Nov 2013	3
	Performance of Settings block displaying Locked	Igor Kazakov 8 Apr 2013	Igor Kazakov 9 Apr 2013	2
	Sending forum messages on cron taking far too long Locked	Jorge Villalon 5 Apr 2013	Dan Poltawski 5 Apr 2013	1
	Which organization for keeping a good response time ? Locked	vouty - 4 Apr 2013	vouty - 4 Apr 2013	0
	Poor performance with Xampp local server (response time = 5") Locked	vouty - 4 Apr 2013	Justin Hunt 16 Apr 2013	6
	Hardware for Moodle2.3 for supported 1000 concurrent users Locked	koe santa 1 Apr 2013	Visvanath Ratnaweera 4 Apr 2013	10
	Extreme Size Performance Locked	Wolf Ventir 29 Mar 2013	Wolf Ventir 19 Apr 2013	4
	Moodle 2.4 much slower than 2.3 on Windows Server Locked	Benjamin St.Germain 28 Mar 2013	Paul Lindgreen 28 Nov 2013	22
	LOADING QUESTIONS: Error writing to database Locked	john mark almarez 25 Mar 2013	john mark almarez 25 Mar 2013	0
	Moodle set up for 60 concurrent quiz users Locked	Jeff Baldmann 23 Mar 2013	jason everling 6 Dec 2013	14
	Slow Page loading speed in quiz Locked	Deepesh Yadav 20 Mar 2013	Howard Miller 20 Mar 2013	2
	Hardware Requirement Locked	S Arvind 19 Mar 2013	Mikołaj Kowalski 5 Apr 2013	2
	Further tests using Ylsow +perfdebug Locked	Mari Cruz García 16 Mar 2013	Mari Cruz García 26 Mar 2013	9
	Moodledata in many luns Locked	Antonio Piedras 14 Mar 2013	J S 18 Mar 2013	1
	Disable logging Locked	Mike Algozzine 14 Mar 2013	Mike Algozzine 14 Mar 2013	0
	Quick question about FastCGI settings and https Locked	Mari Cruz García 12 Mar 2013	Mari Cruz García 15 Mar 2013	2
	Problem with uploading SCORM package to Moodle 2.4.1 platform Locked	Gary Lebowitz 9 Mar 2013	Gary Lebowitz 9 Mar 2013	0
	Hardware Requirment Locked	faizan baig 8 Mar 2013	J S 18 Mar 2013	5
	Windows server: I have tried everything to increase its performance Locked	Mari Cruz García 7 Mar 2013	Mari Cruz García 15 Mar 2013	4
	Caching web pages to enhance performance--where to include directives Locked	Ashok Harnal 2 Mar 2013	Visvanath Ratnaweera 7 Mar 2013	9
	Moodle 2.4.1 "Timed out while waiting for session lock" Locked	Dr. Nellie Deutsch 2 Mar 2013	Ken Task 1 Apr 2013	8
	Ease of access of users with low bandwidth/poor computer resources to 1.9.19 vs. 2.4+ Locked	Gary Lebowitz 1 Mar 2013	Rick Jerz 5 Mar 2013	3
	XHProf (hierarchial profiler for PHP) on Moodle Locked	Visvanath Ratnaweera 28 Feb 2013	Dan Poltawski 5 Mar 2013	1
	Flash to SCORM in Moodle 2.4.1 (Very Slow) Locked	Heng Zhang 27 Feb 2013	Visvanath Ratnaweera 10 Mar 2013	13
	Moodle 2.4 struggling with over 20-30 or so users Locked	David Smith 26 Feb 2013	Jon Witts 27 Feb 2013	4
	performance for 2.4 moodle Locked	Richard Chiha 26 Feb 2013	Visvanath Ratnaweera 3 Mar 2013	1
	Moodle 2.3 running Red Hat Enterprise - poor performance Locked	Doris Johnson 21 Feb 2013	Simon Story 25 Feb 2013	10
	Moodle Statistics block slowing down moodle Locked	Tom Moseley 20 Feb 2013	J S 18 Mar 2013	5
	poor performance for logged in users Locked	Frank Chmely 20 Feb 2013	J S 18 Mar 2013	12
	Not able to run Statistics-Moodle 2.2.6 Locked	richa rathore 19 Feb 2013	Frederic Nevers 20 Feb 2013	1
	Intermittent unavailability and logging of database unavailability Locked	Jonathan Rabson 16 Feb 2013	Visvanath Ratnaweera 18 Feb 2013	3
	Can 2.4 run on a Linux red hat 5.8 server - what is the best mysql for it Locked	Eric Hagley 15 Feb 2013	Visvanath Ratnaweera 16 Feb 2013	6
	Enabling automatic backups slows down server now Locked	Ethan Z 15 Feb 2013	Ken Task 21 Feb 2013	14
	Poor Performance On Windows (Moodle 2.4.1) Locked	Andrew Emmett 12 Feb 2013	Benjamin St.Germain 23 Apr 2013	10
	Godaddy: VPS or (which) dedicated? Locked	Gary Lebowitz 11 Feb 2013	Yousef H. 5 Sept 2013	22
	Terrible performance with GoDaddy VDS - Help! Locked	Gary Lebowitz 11 Feb 2013	Gary Lebowitz 14 Feb 2013	5
	Php acelerator in Windows server Locked	Mari Cruz García 11 Feb 2013	Mari Cruz García 12 Feb 2013	2
	Moodle Version 2.3.3+ Running on Windows 8 Server Locked	Tammy Brice 9 Feb 2013	Mari Cruz García 11 Feb 2013	1
	Is this amount of files correct? - performance increase help please Locked	Jason [Moodle Enthusiast] 8 Feb 2013	Visvanath Ratnaweera 12 Feb 2013	4
	Moodle Hardware Requirement For 300 Concurrent & 550 peak? Locked	Moole Addict 5 Feb 2013	Moole Addict 23 Feb 2013	13
	mdl_cache_text causes the performance bottlement Locked	CP Lau 5 Feb 2013	CP Lau 4 Mar 2013	3
	Problem with Godaddy Virtual Dedicated Server nd Moodle 2.3.3 Locked	Gary Lebowitz 3 Feb 2013	Gary Lebowitz 12 Feb 2013	11
	Database Clustering (revisited?) Locked	Noveck Gowandan 2 Feb 2013	suzancondreywo Dreywo 14 Mar 2013	2
	Need some advise Locked	Mark Tomlinson 31 Jan 2013	Visvanath Ratnaweera 31 Jan 2013	4
	Does location affecting moodle site performance Locked	cscl cscl 29 Jan 2013	cscl cscl 30 Jan 2013	2
	Moodle 2.4.1 performance running slow Locked	Kieran Briggs 29 Jan 2013	Stephen Overall 31 Jan 2013	11
	Bitnami Cloud Hosting w/AWS Locked	Heidi Gartenberg 28 Jan 2013	Rick Jerz 29 Jan 2013	3
	Moodle 1.9 to 2.2 Db performance issue Locked	Aswin Satish 26 Jan 2013	Howard Miller 28 Jan 2013	5
	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
	Equivalent to MaxKeepAliveRequests in Windows IIS7 Locked	Mari Cruz García 16 Jan 2013	Mari Cruz García 24 Jan 2013	2
	Minimum Apache Modules to run Moodle 2 Locked	Michael Haskell 15 Jan 2013	Andrew Lyons 6 Mar 2013	7
	Workaround to load files without file.php Locked	Biel Frontera 14 Jan 2013	Simon Story 15 Jan 2013	2
	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
	JMeter: Page should automatically redirect Locked	Yulstar Lukimin 10 Jan 2013	Alejandro Villamarin 7 Feb 2013	3
	Image Optimization Locked	curt bixel 6 Jan 2013	kenst tjas 22 Feb 2013	7
	Performance impact of user profile images? Locked	David Scotson 4 Jan 2013	David Scotson 9 Jan 2013	4
	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
	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
	Best accelerator for me Locked	roc mehra 20 Dec 2012	Visvanath Ratnaweera 27 Jan 2013	3
	CPU usage 100% on NoSupportLinuxHosting Locked	Dan O'Reilly 20 Dec 2012	Ken Task 22 Dec 2012	11
	CPU USAGE 100% Locked	roc mehra 19 Dec 2012	Visvanath Ratnaweera 31 Dec 2012	16
	bandwidth, RAM - 50 users Locked	Magnolia Serate 18 Dec 2012	Rick Jerz 20 Dec 2012	10
	HW specs for Application and Database server Locked	Yulstar Lukimin 17 Dec 2012	Visvanath Ratnaweera 19 Dec 2012	1
	List of enrolled user for course takes forever! Locked	Olja Petrovic 14 Dec 2012	Visvanath Ratnaweera 12 Feb 2013	1
	Using X-Sendfile to serve files in Moodle Locked	Andrew Lyons 5 Dec 2012	Matteo Scaramuccia 21 Aug 2014	6
	Moodledata Directory Locked	R.T. Brown 4 Dec 2012	Howard Miller 5 Dec 2012	2
	My Moodle is gradually running slower Locked	A. John Peters 27 Nov 2012	Abbie Bates 19 Dec 2012	2
	2 Web Server to One Mysql Locked	Shay Hanna 26 Nov 2012	Simon Story 27 Nov 2012	4
	Munin plugin for Moodle Locked	Ruslan Kabalin 23 Nov 2012	Arnaud Trouvé 15 Feb 2016	19
	Slow speed linked to scripting problem? Locked	Ali West 15 Nov 2012	Ali West 19 Nov 2012	3
	driver oci8 for Oracle Locked	Esteban Sánchez 15 Nov 2012	Esteban Sánchez 15 Nov 2012	0
	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
	Two recent blog posts on performance Locked	Visvanath Ratnaweera 9 Nov 2012	Frederic Nevers 19 Nov 2012	2
	Improving the performance of quizzes Locked	Sam Mudle 9 Nov 2012	Sam Mudle 14 Nov 2012	5
	requirements Locked	Nitharshanaa Shanmuganathan 9 Nov 2012	Nitharshanaa Shanmuganathan 9 Nov 2012	2
	eAccelerator Locked	jonnym m 8 Nov 2012	jason everling 6 Dec 2012	7
	general Locked	Nitharshanaa Shanmuganathan 7 Nov 2012	Nitharshanaa Shanmuganathan 8 Nov 2012	2
	MySQL Master-Master Replication Locked	jason everling 7 Nov 2012	jason everling 10 Nov 2012	4
	Moodle 2.3.2 + Postgres 9.0.3 + Quizzes(?) = stale db connections Locked	Mike Kelly 7 Nov 2012	Michael Haskell 15 Jan 2013	2
	Extremely Slow Locked	Gerrit Anderson 4 Nov 2012	Visvanath Ratnaweera 4 Nov 2012	1
	Migrating from LAN to internet Locked	shiva k 3 Nov 2012	Visvanath Ratnaweera 15 Dec 2012	3
	Any suggestions for a new server setup? Locked	Eric Smith 3 Nov 2012	Grant Mucha 8 Nov 2012	3
	Configuring Moodle with Apache2 load balancer Locked	Dhastha Gheer 2 Nov 2012	Matteo Scaramuccia 3 Nov 2012	3
	My "resource use" has spiked 100% after introducing quizzes Locked	Sam Mudle 2 Nov 2012	Sam Mudle 5 Nov 2012	4
	Moodle 2.2 Choked Locked	Robert Shelton 2 Nov 2012	Visvanath Ratnaweera 29 Jan 2013	5
	Need your advice. Locked	Ben S 1 Nov 2012	Ben S 2 Nov 2012	2
	Setup a MySQL cluster for Moodle Locked	CP Lau 26 Oct 2012	Jonas Asa. 12 Nov 2014	17
	Google Bots Locked	Chris Meyer 26 Oct 2012	Chris Meyer 26 Oct 2012	1
	CAS Browser Looping Locked	Michael Haskell 25 Oct 2012	jason everling 7 Nov 2012	4