On 07/14/2010 10:02 AM, Rob Maidment wrote:
The old (LRU) algorithm made little difference.
I guess it could be that I’m simply exceeding the cache capacity. The
test uses a working set of 2.24GB. How do I configure the size of the
cache?
Two settings:
In etc/trafficserver/storage.config, you will see a line similar to
var/trafficserver 140M
You'll want that closer to 2.24G I imagine :). For the RAM cache, the
setting is in etc/trafficserver/records.config:
CONFIG proxy.config.cache.ram_cache.size INT -1
The default (-1) means it'll calculate the RAM cache size based on the
disk cache size; For every 1GB of disk cache, it uses 1MB of RAM cache
(which is really small honestly). I'd definitely bump this up as much as
your box can handle, but make sure to leave room for the connections and
other buffers (setting this is a "trial and error", and is very
application specific). Fwiw, an inactive connection consumes about 32KB
of memory, and an active one doubles that (for additional buffers). SSL
connections consumes even more memory. (I think this is an area where we
might be able to improve too, patches are welcomed).
I hope any of this helps your benchmarks (really looking forward to see
your results).
-- leif
