* Dobrica Pavlinusic (dpavlin@gmail.com) wrote:
On Fri, Dec 02, 2011 at 05:46:35PM +0100, Paul Poulain wrote:
My first surprise (and I did the tests 3 times to be sure I wasn't making a mistake !) is that you almost get no speed improvement with memcache ON.
I have seen similar behaviour when I benchmarked Koha about a year ago[1]
In the end, I opted to test with plain Memoize as opposed to memcache-backed one. My assumption was that TCP overhead eats away all improvements we might get from memcache (or to put it nicely, mysql and zebra are not *that* slow :-)
1: http://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=7177 2: http://git.rot13.org/?p=koha.git;a=commitdiff;h=b2155fc483f09b34c4a6ba92256f...
Memcached is for scalability not speed. It will however give you speed in easy serialised and deserialised objects, that are costly to create. But scalability is the main thing, you will notice better throughput. And it will take load off your database server, which when you site is very busy will provide speed. CHris -- Chris Cormack Catalyst IT Ltd. +64 4 803 2238 PO Box 11-053, Manners St, Wellington 6142, New Zealand