我正在使用Centos 6.5 64位内核2.6.32和64 GB RAM和12个线程核心的服务器，我无法获得当前在memcache中使用的连接。
这是我的STATS输出：
# echo stats | nc 127.0.0.1 11211 STAT pid 356091 STAT uptime 440 STAT time 1409760961 STAT version 1.4.20 STAT libevent 2.0.21-stable STAT pointer_size 64 STAT rusage_user 1.747734 STAT rusage_system 3.660443 STAT curr_connections 64 STAT total_connections 133 STAT connection_structures 64 STAT reserved_fds 60 STAT cmd_get 123537 STAT cmd_set 63080 STAT cmd_flush 0 STAT cmd_touch 0 STAT get_hits 73162 STAT get_misses 50375 STAT delete_misses 8979 STAT delete_hits 1090 STAT incr_misses 0 STAT incr_hits 0 STAT decr_misses 0 STAT decr_hits 0 STAT cas_misses 0 STAT cas_hits 0 STAT cas_badval 0 STAT touch_hits 0 STAT touch_misses 0 STAT auth_cmds 0 STAT auth_errors 0 STAT bytes_read 68155115 STAT bytes_written 181284445 STAT limit_maxbytes 17179869184 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT threads 12 STAT conn_yields 0 STAT hash_power_level 16 STAT hash_bytes 524288 STAT hash_is_expanding 0 STAT malloc_fails 0 STAT bytes 20493483 STAT curr_items 17980 STAT total_items 63080 STAT expired_unfetched 145 STAT evicted_unfetched 0 STAT evictions 0 STAT reclaimed 147 STAT crawler_reclaimed 0 END 我的输出为ulimit（我不知道我是否达到了一些系统configuration）
# ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 515008 max locked memory (kbytes, -l) unlimited max memory size (kbytes, -m) unlimited open files (-n) 999999 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 65535 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited
我的memcachedconfiguration
# cat /etc/sysconfig/memcached PORT="11211" USER="memcached" MAXCONN="2048" CACHESIZE="16384" OPTIONS="-t 12 -l 127.0.0.1"
目前的服务器每秒钟访问次数超过6k-7k，所以用户数量不是问题，只能连接64个Memcache连接。
我应该增加STAT curr_connections 64到上限？
试着看看memcached用户的ulimit。 像这样的东西：
su memcached -s /bin/bash ulimit -a