(Sorry for top-posting - I'm stuck with Outlook Live :-(

My system's very small - approx 20 users and very little content at present. 
It's for a small collaborative research group which may grew to ~100 members. I 
expect quite a few largish attachments and have already configured filesystem 
attachments.

I'm using PostgreSQL for various reasons, so can't add all the suggested 
indexes (names the string prefix ones that are specific to MySQL), but I'd be 
surprised to be hitting limits so soon.

The slowdown occurred soon after I opened the wiki to the other members, who 
probably did some exploring and perhaps triggered something painful.
________________________________________
From: Paul Libbrecht [[email protected]]
Sent: 02 November 2014 22:21
To: XWiki Users
Subject: Re: [xwiki-users] Monitoring an Xwiki stack

Btw,

I am not sure you could say the XWiki installs are that "pesky".
However, depending on the user base, it may really need quite some tuning.
For example, if your xwiki manipulates complex documents the document cache may 
be too big for the memory, and that you only reach with some time (it could be 
a week or two). OutOfMemoryErrors then appear on a regular basis.

Another example has been the amount of registered users. This is a bit too much 
on curriki to store into a page of objects, so special treatment has been 
applied.
Yet another example would be the mass of attachments, e.g if people use this as 
a shared disk, where the file-system-attachments solution has helped quite many 
(I think).

I think all wikis and CMSs that I know of are rather limited in their default 
goals (beyond XWiki, I have experience with Drupal and Wordpress) and special 
treatment maybe be quickly available, in config, install, or custom development.

Monitoring tools can help you adjust this.

Bryn, maybe you want to indicate how big is your system?
Maybe it's just a matter of some too eager clients (e.g. some ever repeat 
javascript-based-requests served to tens of users every second or so)?

paul
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