Hardware and performance

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.


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DiscussionStarted byRepliesLast post
Quizzes are rending Moodle useless :-( 25 Visvanath Ratnaweera
Mon, 15 Oct 2018, 2:51 PM
What does "automated backup are already running. Execution delayed"? 1 Howard Miller
Mon, 15 Oct 2018, 4:56 AM
Help with Windows Moodle Performance 3 Paul L
Sat, 13 Oct 2018, 3:02 AM
'core_renderer' is taking most of time while loading a page 3 Abdul Ghaffar
Fri, 12 Oct 2018, 3:20 PM
opcache issue on Moodle 3.4 and PHP 7.0.x 7 William Chan
Fri, 12 Oct 2018, 10:04 AM
File vs Database for Sessions, moodle 3.3 6 Paul L
Thu, 11 Oct 2018, 9:18 PM
Might have found the cause of slowness in DB 7 Visvanath Ratnaweera
Thu, 11 Oct 2018, 2:19 PM
optimize performance 3 Jeff White
Tue, 2 Oct 2018, 10:04 PM
What do these stats mean in footer 4 AL Rachels
Mon, 1 Oct 2018, 11:39 PM
Can I modify the .cnf files, delete the innodb files and restart? 1 Howard Miller
Mon, 1 Oct 2018, 4:29 PM
How to improve my cache performance? attached a NewRelic screenshot 5 Andrew Normore
Thu, 27 Sep 2018, 9:45 PM
Moodle Webservices and AWS ElasticCache(memcached) problem 0 Christos Savva
Thu, 27 Sep 2018, 4:19 PM
Speeding up Moodle - reindexing entire database would help? 6 Howard Miller
Thu, 27 Sep 2018, 3:03 PM
Moodle increase size 3 Yoel Gutierrez
Wed, 26 Sep 2018, 10:49 PM
from M3.1 to M3.5 : database issue ? 18 Michel DENIS
Tue, 25 Sep 2018, 4:11 PM
Why is my small Moodle setup maxing out my server's 1 GB memory limit? 23 Francisco Lemus
Sat, 22 Sep 2018, 6:50 AM
Using AWS for Moodle 10 Greg Rudl
Thu, 13 Sep 2018, 3:05 AM
Moodle file picker not working 25 Liana Shpani
Thu, 13 Sep 2018, 2:41 AM
[Moodle BenchMark] Need Beta-tester 66 Visvanath Ratnaweera
Mon, 3 Sep 2018, 10:03 PM
CDN for beginners 2 Mathew Gancarz
Thu, 30 Aug 2018, 12:12 AM
Slow Load Time When Saving a new Activity or Editing an Existing one 6 Ahmed Ali
Mon, 27 Aug 2018, 10:40 PM
Major problems with Moodledata on NFS 4 Visvanath Ratnaweera
Sat, 25 Aug 2018, 4:02 PM
Moodle 3.4 -> 3.5 upgrade time 1 sam marshall
Fri, 24 Aug 2018, 12:26 AM
Can't setup memcached for sessions 0 Regina B
Thu, 23 Aug 2018, 10:44 PM
Dockerized Moodle - Performance 47 Andrew Nicols
Tue, 14 Aug 2018, 8:05 AM
Timing Out 12 Rick Jerz
Mon, 13 Aug 2018, 9:28 AM
Hardware requirements for a minimum traffic of concurrent users 7 Ken Task
Sat, 11 Aug 2018, 1:11 AM
Need a script that would display a node number of a load balanced system - 5 nodes 15 Andreas Panagiotopoulos
Thu, 9 Aug 2018, 1:13 PM
Is there a way to estimate actual number of concurrent Moodle users? 3 Alasham Said
Sun, 5 Aug 2018, 8:06 PM
moodle memcached being used for sessions - confused by what I see 5 John Joubert
Fri, 3 Aug 2018, 2:31 AM
Refresh Mod Calendar Events Task - Slow 6 Russell Morriss
Wed, 1 Aug 2018, 11:04 PM
How to replicate in moodle? 10 Tim Hunt
Wed, 1 Aug 2018, 12:57 AM
grunt css 3 Дмитрий Пименов
Tue, 31 Jul 2018, 10:36 PM
Server hardware for 1000 concurrent users 1 Albert Ramsbottom
Tue, 31 Jul 2018, 6:28 PM
Groups and performance 1 Howard Miller
Fri, 27 Jul 2018, 7:50 PM
Micro Focus for load testing 0 Howard Miller
Wed, 25 Jul 2018, 11:07 PM
Site home very slow, 39 seconds 12 Howard Miller
Wed, 25 Jul 2018, 10:55 PM
Advice on server to run multiple Moodle sites 9 Paul Raper
Mon, 16 Jul 2018, 2:36 PM
This is exciting as I am back, NFS question 8 Matteo Scaramuccia
Tue, 10 Jul 2018, 7:18 PM
Big Blue Button and number of users 3 Albert Ramsbottom
Mon, 9 Jul 2018, 10:03 PM
What may cause a coding error - failed to unserialise data from file. Either failed to read, or failed to write. 2 Albert Ramsbottom
Mon, 9 Jul 2018, 10:01 PM
Problems crashing on the server 7 Albert Ramsbottom
Mon, 9 Jul 2018, 9:36 PM
Event monitoring 2 Helen Brennagh
Mon, 9 Jul 2018, 8:30 PM
Moodle 3.2 server unable to load 500 users 11 Usman Asar
Sat, 23 Jun 2018, 3:51 AM
Moodle SqlDump is 2GB, but MySQL database is only a few Mb... ?? 10 Ken Task
Wed, 20 Jun 2018, 7:14 PM
VPS, too high CPU usage with just one request 21 Rick Jerz
Fri, 15 Jun 2018, 10:35 PM
about the top command 8 mimi nom
Wed, 13 Jun 2018, 6:01 PM
Moodle slow for the first visitor then quick thereafter 24 Nahed Alquwez
Wed, 6 Jun 2018, 12:47 AM
Server specs 9 Visvanath Ratnaweera
Sat, 2 Jun 2018, 5:15 PM
JMeter "Out of Memory” Failure 2 Jerry Lau
Thu, 31 May 2018, 5:08 AM
Moodle installation in intel itanium Windows 2003 system? 9 Visvanath Ratnaweera
Wed, 30 May 2018, 5:53 PM
Settings for memcache for sessions cache - can't find a moodle doc 1 John Joubert
Wed, 30 May 2018, 4:59 AM
Moodle clustering on Windows servers 5 Payman Zafar
Tue, 29 May 2018, 1:22 PM
Has Anyone Used mysqlslap for DB Performance Testing? 2 Ken Task
Sun, 27 May 2018, 8:01 AM
Moodle 3.4 performance is very Low 18 Daoud El Gharib
Fri, 25 May 2018, 7:01 PM
Status indicator light for moodlebox on raspberry pi 3b+ 6 AL Rachels
Wed, 23 May 2018, 10:31 PM
A starndardized quiz to benchmark a Moodle installation? 4 Tim Hunt
Wed, 23 May 2018, 4:56 AM
Windows OS : Which version supported (2003/2008/2012) 7 Ramesh Nair
Mon, 21 May 2018, 4:37 PM
High Load Avarage 3 Howard Miller
Sun, 20 May 2018, 9:02 PM
Load many course categories faster 6 Felipe Dos Santos
Fri, 18 May 2018, 8:33 PM
Nginx or Apache with PHP 7.1.8? 1 Ken Task
Tue, 15 May 2018, 6:41 AM
Roadmap for deploying solution for 2000-4000 students 6 Howard Miller
Mon, 14 May 2018, 4:09 PM
Getting 405 errors while submitting quiz 18 geetha prabhu
Thu, 10 May 2018, 2:55 AM
Jmeter Regular Expression Extractor for "sesskey" 5 Naresh itechnologies
Wed, 9 May 2018, 5:35 PM
Tuning Apache and php-fpm for Moodle 2 Alain Raap
Wed, 9 May 2018, 3:02 PM
Moodle on Windows OS for large User base 3 ramesh nair
Wed, 9 May 2018, 2:39 PM
It's 2:30 and I have been importing grades since 8:30AM 7 Visvanath Ratnaweera
Tue, 8 May 2018, 2:52 PM
Problem with Purge Caches Moodle 3.3 4 Jeff White
Thu, 3 May 2018, 4:29 AM
Site performance 3 Howard Miller
Sun, 29 Apr 2018, 3:28 AM
Moodle Quiz with 500 Concurrent User achieved 2 John Frunks
Sat, 21 Apr 2018, 1:35 AM
3000 concurrent users in a course 5 Howard Miller
Fri, 20 Apr 2018, 10:25 PM
Server Configuration 1 Howard Miller
Wed, 18 Apr 2018, 4:25 AM
Is 24GB or RAM for database server enough + moodledata storage design 4 Visvanath Ratnaweera
Mon, 16 Apr 2018, 9:29 PM
tcm_grade_items_history table is HUGE! 4 Chris Fryer
Sun, 15 Apr 2018, 3:42 AM
quiz conducting 400 users concurrently 2 Moodle Admin
Sun, 15 Apr 2018, 2:28 AM
Effect of clearing tcm_grade_items_history table? 1 Tim Hunt
Sat, 14 Apr 2018, 9:16 PM
Has anyone successfully run a jmeter test with 1000 users? 4 Diane Soini
Sat, 14 Apr 2018, 5:09 AM
Session not passing to popup window 2 Howard Miller
Tue, 10 Apr 2018, 12:34 AM
https over login page only in "Moodle 3.4" 5 Emma Richardson
Fri, 6 Apr 2018, 9:04 PM
File picker never loading... 22 Matteo Scaramuccia
Fri, 6 Apr 2018, 4:31 AM
Jmeter output - no slash between host and sitepath 4 Diane Soini
Wed, 4 Apr 2018, 6:11 AM
A server to install moodle 8 erdal ayan
Tue, 3 Apr 2018, 4:44 PM
Assignment Submissions is very very slow! 2 Alireza Akhavan
Sun, 1 Apr 2018, 2:16 PM
Jmeter version used 5 Jerry Lau
Fri, 30 Mar 2018, 7:21 AM
Xsendfile - resulting in no Images? 4 Matteo Scaramuccia
Fri, 30 Mar 2018, 4:32 AM
Hardware required for up to 30 users in intranet using OWL Oohoo language lab plugin for Moodle 4 AL Rachels
Fri, 30 Mar 2018, 12:45 AM
Wordpress and Moodle Performance 3 Usman Asar
Tue, 27 Mar 2018, 12:56 AM
Moodle 3.2 - Memcached Session Handling PHP 7.0.9 4 TC TC
Tue, 27 Mar 2018, 12:33 AM
Seeking Anyone who host Moodles on Rackspace .... 6 Ken Task
Mon, 26 Mar 2018, 10:31 PM
Be Objective: MS SQL Server Enterprise or MySQL enterprise & HA setup recommendations 6 Jerry Lau
Fri, 23 Mar 2018, 3:41 AM
Moodle Installation in Rural Area 17 Marcus Green
Sat, 17 Mar 2018, 1:12 AM
Moodle become slow when editing a user profile 20 mimi nom
Sat, 10 Mar 2018, 9:07 PM
5s to load any page, and 30s if admin 8 Usman Asar
Thu, 8 Mar 2018, 12:27 AM
Moodle site very slow from off premisis 13 Jack B
Tue, 6 Mar 2018, 1:43 AM
Finding unlogged in IPs hitting Moodle server 18 heli g
Thu, 1 Mar 2018, 4:40 PM
Shared host or not to shared host, that is the question 10 Usman Asar
Tue, 27 Feb 2018, 12:42 AM
Delayed mailings 3 Sergio Comerón Sánchez-Paniagua
Thu, 22 Feb 2018, 7:51 PM
Dockerized Moodle - Dynamic configuration 4 Howard Miller
Mon, 19 Feb 2018, 12:29 AM
Server Hardware Requisites 10 Hugo Cardoso
Sat, 17 Feb 2018, 6:37 AM
Running cron from multiple webservers 9 Christos Savva
Mon, 12 Feb 2018, 4:41 PM
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