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Posted to users@openjpa.apache.org by Rohit Kelapure <ke...@gmail.com> on 2009/10/14 16:50:34 UTC
Query Cache questions
Dear All,
I had two questions related to Query Cache. I will appreciate your input on
these Qs...
1. Can a QueryCache be enabled independent of the DataCache. The spec.
currently says that "The query cache is enabled by default when the data
cache is enabled".
2. Can the QueryCache and DataCache share the same underlying cache bucket.
i.e. Both caches pour their cache keys and cache values in the same cache
bucket/hashmap.
--Thank You,
Rohit Kelapure
--
View this message in context: http://n2.nabble.com/Query-Cache-questions-tp3823240p3823240.html
Sent from the OpenJPA Users mailing list archive at Nabble.com.
Re: Query Cache questions
Posted by Rohit Kelapure <ke...@gmail.com>.
Thanks Kevin!
Kevin Sutter wrote:
>
> Hi Rohit,
>
> On Wed, Oct 14, 2009 at 9:50 AM, Rohit Kelapure <ke...@gmail.com>
> wrote:
>
>>
>> Dear All,
>>
>> I had two questions related to Query Cache. I will appreciate your input
>> on
>> these Qs...
>>
>> 1. Can a QueryCache be enabled independent of the DataCache. The spec.
>> currently says that "The query cache is enabled by default when the data
>> cache is enabled".
>>
>
> The QueryCache can be independently disabled from the DataCache usage, but
> it can not be enabled separately from the DataCache. The QueryCache
> benefits from the DataCache being available. The DataCache is where the
> entity data is cached.
>
>
>>
>> 2. Can the QueryCache and DataCache share the same underlying cache
>> bucket.
>> i.e. Both caches pour their cache keys and cache values in the same cache
>> bucket/hashmap.
>>
>
> I suppose you could, but I would question why you would want to do this.
> Currently, you can configure these two caches independently. But, in a
> simple, out-of-the-box configuration, you could probably share the same
> cache instance. The keys for these two caches are completely different,
> so
> I'm not sure if that would affect your cache implementation.
>
>
>> --Thank You,
>> Rohit Kelapure
>> --
>> View this message in context:
>> http://n2.nabble.com/Query-Cache-questions-tp3823240p3823240.html
>> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>>
>
>
--
View this message in context: http://n2.nabble.com/Query-Cache-questions-tp3823240p3823483.html
Sent from the OpenJPA Users mailing list archive at Nabble.com.
Re: Query Cache questions
Posted by Kevin Sutter <kw...@gmail.com>.
Hi Rohit,
On Wed, Oct 14, 2009 at 9:50 AM, Rohit Kelapure <ke...@gmail.com> wrote:
>
> Dear All,
>
> I had two questions related to Query Cache. I will appreciate your input on
> these Qs...
>
> 1. Can a QueryCache be enabled independent of the DataCache. The spec.
> currently says that "The query cache is enabled by default when the data
> cache is enabled".
>
The QueryCache can be independently disabled from the DataCache usage, but
it can not be enabled separately from the DataCache. The QueryCache
benefits from the DataCache being available. The DataCache is where the
entity data is cached.
>
> 2. Can the QueryCache and DataCache share the same underlying cache bucket.
> i.e. Both caches pour their cache keys and cache values in the same cache
> bucket/hashmap.
>
I suppose you could, but I would question why you would want to do this.
Currently, you can configure these two caches independently. But, in a
simple, out-of-the-box configuration, you could probably share the same
cache instance. The keys for these two caches are completely different, so
I'm not sure if that would affect your cache implementation.
> --Thank You,
> Rohit Kelapure
> --
> View this message in context:
> http://n2.nabble.com/Query-Cache-questions-tp3823240p3823240.html
> Sent from the OpenJPA Users mailing list archive at Nabble.com.
>