Memcached Memcached not using more than 3.9gb ram

how are you confirming and determining memcached server memory allocation ? what commands ?

 

could be bug in the web site page confirm using SSH command below

Code (Text):

echo stats | nc 127.0.0.1 11211

as per Memcached Server - CentminMod.com LEMP Nginx web stack for CentOS i set /etc/init.d/memcached memory limit to MEMSIZE=5120 for 5GB and restart memcached server service and confirm it's working for me via stats variable limit_maxbytes

Code (Text):

STAT limit_maxbytes 5368709120

full stats output from the SSH command with 5GB memory allocated to memcached server

Code (Text):

echo stats | nc 127.0.0.1 11211
STAT pid 16924
STAT uptime 6
STAT time 1459166785
STAT version 1.4.25
STAT libevent 2.0.22-stable
STAT pointer_size 64
STAT rusage_user 0.004074
STAT rusage_system 0.000000
STAT curr_connections 5
STAT total_connections 6
STAT rejected_connections 0
STAT connection_structures 6
STAT reserved_fds 20
STAT cmd_get 0
STAT cmd_set 0
STAT cmd_flush 0
STAT cmd_touch 0
STAT get_hits 0
STAT get_misses 0
STAT delete_misses 0
STAT delete_hits 0
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 6
STAT bytes_written 0
STAT limit_maxbytes 5368709120
STAT accepting_conns 1
STAT listen_disabled_num 0
STAT time_in_listen_disabled_us 0
STAT threads 4
STAT conn_yields 0
STAT hash_power_level 16
STAT hash_bytes 524288
STAT hash_is_expanding 0
STAT slab_reassign_rescues 0
STAT slab_reassign_evictions_nomem 0
STAT slab_reassign_inline_reclaim 0
STAT slab_reassign_busy_items 0
STAT slab_reassign_running 0
STAT slabs_moved 0
STAT lru_crawler_running 0
STAT lru_crawler_starts 0
STAT lru_maintainer_juggles 95
STAT malloc_fails 0
STAT bytes 0
STAT curr_items 0
STAT total_items 0
STAT slab_global_page_pool 0
STAT expired_unfetched 0
STAT evicted_unfetched 0
STAT evictions 0
STAT reclaimed 0
STAT crawler_reclaimed 0
STAT crawler_items_checked 0
STAT lrutail_reflocked 0
STAT moves_to_cold 0
STAT moves_to_warm 0
STAT moves_within_lru 0
STAT direct_reclaims 0
END

 

Also memcached web stats page shows 5GB too

 

oh i see you have 1.1 used + 3.9 free = 5.0 GB total so reports correctly !

 

that's probably cause your web apps don't use more than 3.9GB

 

if you think it's a bug, you'd best submit a report on official memcached bug issues tracker at Issues · memcached/memcached · GitHub

 

type

Code (Text):

uname -m
echo stats | nc 127.0.0.1 11211

if 1st command is x86_64 = 64bit system and 2nd command look for pointer_size is 64 = 64bit if 32 = 32bit memcached install