I have memcache up and running on Heroku using the dalli gem. I'm on
the 5 MB free plan. I'd like to know if that is enough, or if I should
upgrade. When I run Rails.cache.stats, I get this:
{"mc3.ec2.northscale.net:11211"=>{"bytes"=>"20762798",
"cas_misses"=>"0", "delete_hits"=>"0", "get_hits"=>"443294",
"rusage_system"=>"48280.750000", "pid"=>"7601", "cas_hits"=>"0",
"incr_misses"=>"0", "connection_structures"=>"10103",
"evictions"=>"95246", "threads"=>"4", "limit_maxbytes"=>"67108864",
"incr_hits"=>"0", "cmd_flush"=>"34", "decr_misses"=>"0",
"pointer_size"=>"64", "daemon_connections"=>"10",
"time"=>"1297888580", "conn_yields"=>"0",
"engine_maxbytes"=>"5242880", "version"=>"1.4.4_188_g0117a2c",
"total_items"=>"490690", "bytes_written"=>"1678901453",
"rejected_conns"=>"54903", "decr_hits"=>"0", "delete_misses"=>"0",
"cmd_get"=>"552048", "total_connections"=>"26236663",
"curr_connections"=>"1490", "uptime"=>"5843755", "auth_cmds"=>"524",
"cmd_set"=>"490690", "rusage_user"=>"1522.710896",
"curr_items"=>"14794", "bytes_read"=>"399468629", "cas_badval"=>"0",
"get_misses"=>"108754"}}
The only number that makes sense is "engine_maxbytes", which seems to
be around 5MB. The other numbers seem to include usage from other
clients as well, i.e. I seem to be sharing this memcache instance with
others. For example, I'm sure I don't have 14794 items ("curr_items"),
my actual usage is more like 20.
Does anybody have experience how to get accurate memcache statistics
on Heroku?
Thanks!
Kevin
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