疑问:Redis中有部分数据访问的时候会很慢，如果把数据清理后再访问就正常了
发现一个奇诡的问题，Redis运行一段时间，大约2周左右，就会出现访问redis中的个别key的时候会非常慢，如果我把这些key值删除后，重新生成key，再访问就恢复正常了。# redis-cli inforedis_version:2.4.10
redis_git_sha1:00000000
redis_git_dirty:0
arch_bits:64
multiplexing_api:epoll
gcc_version:4.4.6
process_id:1229
uptime_in_seconds:2256216
uptime_in_days:26
lru_clock:147591
used_cpu_sys:42140.66
used_cpu_user:19572.84
used_cpu_sys_children:1018.49
used_cpu_user_children:6456.72
connected_clients:20
connected_slaves:0
client_longest_output_list:0
client_biggest_input_buf:0
blocked_clients:0
used_memory:171688576
used_memory_human:163.73M
used_memory_rss:189091840
used_memory_peak:171804152
used_memory_peak_human:163.85M
mem_fragmentation_ratio:1.10
mem_allocator:jemalloc-2.2.5
loading:0
aof_enabled:0
changes_since_last_save:5775
bgsave_in_progress:0
last_save_time:1448510743
bgrewriteaof_in_progress:0
total_connections_received:30091
total_commands_processed:1728047983
expired_keys:2908317
evicted_keys:0
keyspace_hits:131659718
keyspace_misses:7112641
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:3458
vm_enabled:0
role:master
db0:keys=451963,expires=286312total_connections_received:30091
total_commands_processed:1728047983
expired_keys:2908317
evicted_keys:0
keyspace_hits:131659718
keyspace_misses:7112641
pubsub_channels:0
pubsub_patterns:0
latest_fork_usec:3458
vm_enabled:0
role:master
db0:keys=451963,expires=286312 memcache有类似的情况没
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