I'm retrieving statistics via Memcache::extendedStats function, here are the basics:
Session Server 1 Version 1.2.2 Uptime 398,954 sec Cache Hits 2,065,061 Cache Misses 987,726 (47.83%) Current Items 381,928 Data Read 4,318,055.02 KB Data Written 2,011,004.09 KB Current Storage 100,688.96 KB Maximum Storage 256.00 MB Current Connections 9 Total Connections 5,278,414 Session Server 2 Version 1.2.2 Uptime 398,943 sec Cache Hits 2,225,697 Cache Misses 987,733 (44.38%) Current Items 381,919 Data Read 4,323,893.05 KB Data Written 2,159,309.95 KB Current Storage 100,685.52 KB Maximum Storage 256.00 MB Current Connections 11 Total Connections 5,278,282 We are absolutely sure that both webservers are able to access the memcache server instances, we selected memcache because it was an easy configuration and setup without any changes of source code required, not to think that it is "absolutely" reliable. We just need to make sure that it works most of the time, but current situation is just unacceptable. On Mar 13, 8:33 am, dormando <dorma...@rydia.net> wrote: > > Here is our current setup: > > webserver1 (also runs session memcache server) > > webserver2 (also runs session memcache server) > > database (specialized memcache storage for data caching) > > > We are not really a high loaded site, at peak time only about 1500 > > users online together. Network is not really saturated, as not much > > data being transferred I believe. > > > Here is the phpinfo() part for sessions: > > session.auto_start Off Off > > session.bug_compat_42 On On > > session.bug_compat_warn On On > > session.cache_expire 180 180 > > session.cache_limiter nocache nocache > > session.cookie_domain no value no value > > session.cookie_httponly Off Off > > session.cookie_lifetime 0 0 > > session.cookie_path / / > > session.cookie_secure Off Off > > session.entropy_file no value no value > > session.entropy_length 0 0 > > session.gc_divisor 100 100 > > session.gc_maxlifetime 1440 1440 > > session.gc_probability 0 0 > > session.hash_bits_per_character 4 4 > > session.hash_function 0 0 > > session.name PHPSESSID PHPSESSID > > session.referer_check no value no value > > session.save_handler memcache memcache > > session.save_path tcp://172.23.111.11:11211,tcp://172.23.111.12:11211 > > tcp://172.23.111.11:11211,tcp://172.23.111.12:11211 > > session.serialize_handler php php > > session.use_cookies On On > > session.use_only_cookies Off Off > > session.use_trans_sid 0 0 > > > And yes, we use PECL memcache extension. > > Can you paste the output of 'stats' against both of your memcached > servers? Is your configuration identical on both servers? How have you > been calculating the miss rate?
