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1
Q: 

Drawback to having cache enabled, but sized to 0 in MySQL?

Is there a performance hit, or any other drawbacks to leaving query caching enabled in MySQL 5, but sizing the cache to 0 bytes?

I assume that any performance impact would be minimal if any, but I'm wondering if there are any other issues which might arise that I have not considered.

A: 

Setting the query_cache_size to 0 will disable query caching completely at MySQL.

So when it is good idea to use query cache?

Node  2009-03-18 14:32:03
Wonderful! Searching a little deeper revealed that the size was what determined if caching was on or not, and not have_query_cache.Also, thanks for the link on when it is a good idea to use cache! It was a great read.
BigDave  2009-03-18 15:57:05

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