[Building Sakai] realmRoleGroupCache 100% miss.

[Aaron Zeckoski]

It's on my TODO list but if others have more time to test it they are
welcome to take it over.
-AZ

On Fri, Aug 17, 2012 at 9:37 AM, Steve Swinsburg
<steve.swinsburg at gmail.com> wrote:
> Looks like there is a patch for it, and that it improves performance considerably. Anyone closer to this caching code able to take a look?
>
> Quite a few cache misses means there should be room for significant gains.
>
> Thanks
> Steve
>
> Sent from my iPad
>
> On 17/08/2012, at 23:15, Aaron Zeckoski <azeckoski at unicon.net> wrote:
>
>> The cache as implemented in
>> https://jira.sakaiproject.org/browse/KNL-600 does not work right so it
>> definitely should NOT be turned on be default. See the notes in the
>> ticket for more details.
>> -AZ
>>
>>
>> On Fri, Aug 17, 2012 at 1:41 AM, Steve Swinsburg
>> <steve.swinsburg at gmail.com> wrote:
>>> Hi all,
>>>
>>> In trunk and in 2.9 I'm seeing a 100% miss ratio on the following cache. This cache is not present in 2.8. I checked the 2.9 Qa servers and they show the same thing.
>>>
>>> org.sakaiproject.authz.impl.DbAuthzGroupService.realmRoleGroupCache: count:0 hits:0 misses:2507 hit%:0
>>>
>>> On another instance I had over 8000 misses in an hour.
>>>
>>> Last change to the kernel authz-components.xml (where this cache is defined) was r105160, done in https://jira.sakaiproject.org/browse/KNL-532
>>>
>>> The previous commit was where this cache definition was added which was r85976, done in https://jira.sakaiproject.org/browse/KNL-600
>>>
>>> Looking through the code I see that is is controlled via this in sakai.properties, and defaults to false
>>>
>>> authz.cacheGrants = true/false
>>>
>>> I wonder if we should enable this one by default?
>>>
>>> Dave I've copied you in since you added the cache, how has your experience been with it?
>>>
>>> cheers,
>>> Steve
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>>
>>
>>
>> --
>> Aaron Zeckoski - Software Architect - http://tinyurl.com/azprofile



-- 
Aaron Zeckoski - Software Architect - http://tinyurl.com/azprofile