krstic at solarsail.hcs.harvard.edu
Sat Mar 28 12:36:10 EDT 2009
On Mar 28, 2009, at 4:51 PM, David Farning wrote:
> (among other things) is still growing pretty quickly.
I'm not sure what you're trying to say. Memcached is a slab-allocated
cache with a LRU ejection policy which is triggered only when the slab
class selected for a new allocation is full. Optional expiration times
for stored items are not taken into account by any kind of real-time
garbage collector; they're just given precedence in the LRU calculation.
In other words, by definition, memcached memory utilization will keep
growing until it hits whatever limit you gave it. This isn't bad. It's
exactly how it's supposed to be, which is why the graphs you have are
practically useless. You care about the cache utilization rate, not
Ivan Krstić <krstic at solarsail.hcs.harvard.edu> | http://radian.org
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