why redis key always lost

[Olsen]

hi 
I use redis sets by function SUNION、SINTER、SDIFF 
However sometimes,some keys disappear.sometimes it works good
I haven’t set expiration to those keys with my memory up to 8G
That means it couldn’t be possible that the keys disappear because of the insufficient of memory or expiration.
May i know the reason why the keys disappear??

192.168.1.1:6379> info

# Server

redis_version:2.8.19

redis_git_sha1:00000000

redis_git_dirty:0

redis_build_id:88e68de9b0f62c84

redis_mode:standalone

os:Linux 2.6.32-504.3.3.el6.x86_64 x86_64

arch_bits:64

multiplexing_api:epoll

gcc_version:4.4.7

process_id:28672

run_id:4bf75cd4674098e35eefb445a30d0233665f8163

tcp_port:6379

uptime_in_seconds:133019

uptime_in_days:1

hz:10

lru_clock:13142690

config_file:/usr/local/redis/conf/redis.conf

# Clients

connected_clients:1

client_longest_output_list:0

client_biggest_input_buf:0

blocked_clients:0

# Memory

used_memory:20548856

used_memory_human:19.60M

used_memory_rss:25493504

used_memory_peak:29243008

used_memory_peak_human:27.89M

used_memory_lua:35840

mem_fragmentation_ratio:1.24

mem_allocator:jemalloc-3.6.0

# Persistence

loading:0

rdb_changes_since_last_save:2155958

rdb_bgsave_in_progress:0

rdb_last_save_time:1422295815

rdb_last_bgsave_status:ok

rdb_last_bgsave_time_sec:-1

rdb_current_bgsave_time_sec:-1

aof_enabled:0

aof_rewrite_in_progress:0

aof_rewrite_scheduled:0

aof_last_rewrite_time_sec:-1

aof_current_rewrite_time_sec:-1

aof_last_bgrewrite_status:ok

aof_last_write_status:ok

# Stats

total_connections_received:160761

total_commands_processed:11274552

instantaneous_ops_per_sec:11

total_net_input_bytes:3098951034

total_net_output_bytes:325528874

instantaneous_input_kbps:0.40

instantaneous_output_kbps:1.29

rejected_connections:0

sync_full:0

sync_partial_ok:0

sync_partial_err:0

expired_keys:121586

evicted_keys:0

keyspace_hits:2366068

keyspace_misses:80999462

pubsub_channels:0

pubsub_patterns:0

latest_fork_usec:0

# Replication

role:master

connected_slaves:0

master_repl_offset:0

repl_backlog_active:0

repl_backlog_size:1048576

repl_backlog_first_byte_offset:0

repl_backlog_histlen:0

# CPU

used_cpu_sys:88.37

used_cpu_user:294.40

used_cpu_sys_children:0.00

used_cpu_user_children:0.00

# Keyspace

db0:keys=103,expires=70,avg_ttl=1774558

db1:keys=1575,expires=466,avg_ttl=653701

db2:keys=44,expires=6,avg_ttl=31965362

db3:keys=2002,expires=1995,avg_ttl=31669626

db4:keys=7,expires=7,avg_ttl=172437

[Olsen]

i use redis monitor, no have del or srem command

在 2015年1月28日星期三 UTC+8下午3:18:45，Olsen写道：

[Greg Andrews]

On Tue, Jan 27, 2015 at 11:18 PM, Olsen <ol...@irs.ph> wrote:

I haven’t set expiration to those keys with my memory up to 8G

The output of your info shows keys are not being evicted from maxmemory settings, but are being expired from TTL:

# Stats
...
expired_keys:121586
evicted_keys:0
...

# Keyspace

db0:keys=103,expires=70,avg_ttl=1774558

db1:keys=1575,expires=466,avg_ttl=653701

db2:keys=44,expires=6,avg_ttl=31965362

db3:keys=2002,expires=1995,avg_ttl=31669626

db4:keys=7,expires=7,avg_ttl=172437

Why wouldn't the keys have expired due to TTL?

  -Greg