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How do I monitor memcached to know if / how many evictions are occurring, and how much memory is used/free.

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up vote 6 down vote accepted

$telnet ip_of_memcached_host 11211 or $nc ip_of_memcached_host 11211

stats
STAT pid 117
...
STAT limit_maxbytes 67108864
....
STAT evictions 0
END

stats slabs
....
STAT total_malloced 30234456
END

or use favorite programming language api for memcached

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