[drupal-devel] Drupal performance testing

Dries Buytaert dries at buytaert.net
Fri Aug 19 05:10:14 UTC 2005

On 19 Aug 2005, at 04:23, Moshe Weitzman wrote:
> Drupal's highest performing cache setting is called 'Loose'. Any  
> high traffic site will want this, so i see no reason to test  
> otherwise. At one time, we thought that there must be a bug in its  
> implementation because drupal.org was not experiencing a good cache  
> hit ratio. In the end, I think we saw that some misbehaved crawlers  
> and hosts were slamming the site and requesting many obscure pages  
> not in the cache. One of them was AskJeeves! Lots of discussion  
> starting with this post: http://lists.drupal.org/archives/ 
> infrastructure/2005-05/msg00123.html and conturing into the next  
> month ... This sort of optimization really requires drupal  
> knowledge and not just 'optimization experience.'

The current loose caching scheme doesn't work for drupal.org, where  
lots of nodes/comments get posted.  I modified drupal.org's  
cache_clear_all() function to ignore 19 out of 20 cache flushes.   
Without that hack, drupal.org would be have fallen over already.   
That is, loose caching still needs to be looked at.

Dries Buytaert  ::  http://www.buytaert.net/

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