On 15.07.2013 15:31, Egoitz Aurrekoetxea wrote:
> Could Mysql cache cause a performance penalty, when invalidating
> queries of a big Mysql cache zone?

can, and *will* ... see also http://dom.as/tech/query-cache-tuner/

cache is locked while entries are being purged to prevent handing out
cached results that may already be out-of-date, and the more active
cache entries that need to be purged the longer it stays locked ...


-- 
Hartmut Holzgraefe <hart...@skysql.com>
Principal Support Engineer (EMEA)
SkySQL AB - http://www.skysql.com/

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