[Systems] building on sunjammer

David Farning dfarning at sugarlabs.org
Tue Feb 24 11:06:17 EST 2009

On Wed, Feb 25, 2009 at 9:52 AM, Bernie Innocenti <bernie at codewiz.org> wrote:
> David Farning wrote:
>> Bernie,
>> On a closely related note.
>> Have you been keeping an eye on
>> http://sunjammer.sugarlabs.org/munin/sugarlabs.org/sunjammer.sugarlabs.org-cpu.html
>> ?
> That's really weird: top does not reveal any background activity.
> Munin usually works fine, so we might be observing some artifact of
> the xen virtualization.
>> Sugar Labs doesn't move too fast so we may want to start planning ahead....
>> The single biggest factor affecting aslo is memory for running
>> memchached. As we come fully online we are going to want to bring the
>> memcached hit rate up to 90%.
>> We are now at a 40% hit rate with a 1G cache.
> How big is the addons database?  Certainly smaller than 1GB.
> The hit rate of might not improve at all with a bigger cache, and 40%
> might be the maximum number of queries that can actually be cached
> without going through the database.
Yes, the problem is our write/read ratio.

To many people registering and uploading activities.

As we start to approach amo usage patterns the 90% hit rate should be


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