[Building Sakai] Slow response creating samigo tests

[Stephen Marquard]

I don't know why T&Q is deleting resources in this context, but I'm sure a contributing factor to the performance issues is that Content Hosting does a copy operation for a delete operation to support undelete, rather than just a move operation.

So every delete action writes the deleted file out again to the filesystem in a different location. I'd say this is overdue for optimization :-).

Cheers
Stephen

---
Stephen Marquard, Learning Technologies Co-ordinator,
Centre for Innovation in Learning and Teaching (CILT)
University of Cape Town
http://www.cilt.uct.ac.za
stephen.marquard at uct.ac.za
Phone: +27-21-650-5037 Cell: +27-83-500-5290


-----Original Message-----
From: sakai-dev-bounces at collab.sakaiproject.org [mailto:sakai-dev-bounces at collab.sakaiproject.org] On Behalf Of Alex Ballesté
Sent: 16 October 2014 10:11 AM
To: sakai-dev
Subject: [Building Sakai] Slow response creating samigo tests

Hello everyone,

Recently we've detected a strange behaviour in a site with few users using Samigo. An instructor creates a test selecting questions randomly from a sub-pool.
Test is configured with only 10 questions from the pool. It has 370 questions, most of them with a little attachment. When instructor tries to preview / edit the part/ publish ...  it takes a lot of time to answer. Time out message is often shown.

In the debug log we saw a lot of lines like this.

2014-10-15 14:02:58,857  INFO http-bio-8080-exec-3 org.sakaiproject.content.impl.DbContentService - Removing resource
(/attachment/101501-1415/Tests/c09ae748-33a5-XXXX-XXXX-7c71f5626fa7/XXXX_84.doc)
content: /XXXXXXX

It seem like he moves all the files to create the assessment and then removes them (maybe the discarded questions???)


Did anybody experiment that behaviour? Do you know related JIRA? I can't
find it.

Thanks in advance,

Alex.


--
Alexandre Ballesté Crevillén  alexandre.balleste at udl.cat
=====================
Universitat de Lleida
Àrea de sistemes d'Informació i Comunicacions
Analista/Programador

University of Lleida
Information and Communication Systems Service
Analyst / Programmer

Tlf: +34 973 702148
Fax: +34 973 702130
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