Hello

I am using querycache at memcached server to store query results. Recently I have noticed that the results are being hold in the cache for only 5-10 seconds - but my expiraration configuration parameter is set to 900 .
I also noticed that if I repeatably execute the same query , the results are returned from the cache, even after longer time than 10 seconds. If I stop executing the query, wait for 10 seconds - the cache goes away.

What can cause cache expiration ? Maybe I should search for the problem at my memcache machine (it is dedicated linux server with default memcached installation, connected by the LAN cable)