Moodle in English: optimize performance

optimize performance

by solmaz naderi - Tuesday, October 2, 2018, 4:30 PM

Hi every one

we are using moodle 2.9+ (will upgrade in future) and have about 5000 users. authentication is working by LDAP . but login takes too time. about 30 sec.I want to optimize that. fallowing information has taken at modules>caching>Test performance page:

Cache store performance reporting - 100 unique requests per operation.

Test with 1, 10, 100, 500, 1000, 5000, 10000, 50000, 100000 requests

Store requests when used as an application cache.

Plugin	Result	Set	Get - Hit	Get - Miss	Delete
File cache	Tested	0.3412	0.0481	0.0030	0.0285
Memcache	Invalid plugin	-	-	-	-
Memcached	Invalid plugin	-	-	-	-
MongoDB	Invalid plugin	-	-	-	-
Session cache	Unsupported mode	-	-	-	-
Static request cache	Unsupported mode	-	-	-	-

Store requests when used as a session cache.

Plugin	Result	Set	Get - Hit	Get - Miss	Delete
File cache	Tested	0.5848	0.0320	0.0022	0.0262
Memcache	Invalid plugin	-	-	-	-
Memcached	Invalid plugin	-	-	-	-
MongoDB	Invalid plugin	-	-	-	-
Session cache	Tested	0.0004	0.0002	0.0001	0.0002
Static request cache	Unsupported mode	-	-	-	-

Store requests when used as a request cache.

Plugin	Result	Set	Get - Hit	Get - Miss	Delete
File cache	Unsupported mode	-	-	-	-
Memcache	Invalid plugin	-	-	-	-
Memcached	Invalid plugin	-	-	-	-
MongoDB	Invalid plugin	-	-	-	-
Session cache	Unsupported mode	-	-	-	-
Static request cache	Tested	0.0003	0.0001	0.0001	0.0002

thanks in advance

Solmaz

Re: optimize performance

by Howard Miller - Tuesday, October 2, 2018, 4:35 PM

Moving to Hardware and performance...

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Re: optimize performance

by Howard Miller - Tuesday, October 2, 2018, 4:39 PM

Your file caching is VERY slow. On my test server (which is nothing special at all) the performance is an order of magnitude faster.

Is your 'moodledata' on some sort of slow storage (NFS, some other share, some mystery virtualised storage)? You need to set up a proper cache using Redis, memcached or similar.

Attachment Screen Shot 2018-10-02 at 09.40.29.png

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Re: optimize performance

by Hendy Irawan - Monday, September 2, 2019, 11:35 AM

> Your file caching is VERY slow. On my test server (which is nothing special at all) the performance is an order of magnitude faster.

How do you get/read this information?

I am really confused reading the numbers on this page. What does "0.0263" means, since there is not unit of measurement listed.

The headings read "store requests" , so I assume the number means "0.0263 store requests".... per what? per second?

Is it millisecond?

If this gets explained I can file an improvement request or even a PR to add explanation in this page.

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Re: optimize performance

by Andrew Nicols - Monday, September 2, 2019, 12:43 PM

It is the time, in seconds, to run the specified number of requests.

Smaller values are better.

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Re: optimize performance

by Jeff White - Tuesday, October 2, 2018, 10:04 PM

If login is taking a long time, I would do some testing to see if its not the ldap server itself that is getting bogged down and not your web server. Just doing simple logins via command line and getting the wait times would be a good test.

As for your file caching times. I am guessing you are using something other than just local disk, most likely NFS. I would recommend checking out using Redis for most of your caching if you cant use a more enterprise storage (more money) solution.

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Re: optimize performance

by Andrew Nicols - Monday, September 2, 2019, 12:45 PM

Those cache times look fine. If this only happens at login, I'd be looking at your LDAP setup. Chances are that something is wrong.

How is your LDAP server specified? Are the DNS records correct? Are they pointing at the right IPs? Is the TLS configuration correct?

30 seconds sounds suspiciously like a timeout thing.

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