[MediaWiki-l] verify sessions stored in memcached

Frank Baxmann service at frankbaxmann.de
Sat Oct 3 22:56:10 UTC 2015


That is the "golden" question.
The wasted is normal.
Look to the MB used, and if it goes to your limit, increase the memory.
I make 128MB min. on my servers.

On 04.10.2015 00:39, Tim Dunphy wrote:
>> you just see the config of memcached.
>> To see more you need admin tools, I use "phpMemcachedAdmin" for this.
>> But with these tools you just see the detail status and config of
>> memcached,
>> the hitrates and the Slab details.
>> If you know the size of the session data, you can look into the
>> slab details and see the data there.
>
> Cool! Thanks for the advice. I just set this up! Looks good.  One question
> for you tho. In my about 1.9% of memcached used and 41.6% as 'wasted'. So I
> guess that means that my wiki setup isn't using that much of memcached. How
> can I determine the best size of the cache for my memcached setup?
> Currently I'm only using the default which is 64MB of cache.
>
> Thanks,
> Tim
>
> On Sat, Oct 3, 2015 at 5:42 PM, Frank Baxmann <service at frankbaxmann.de>
> wrote:
>
>> Hi Tim,
>>
>> you just see the config of memcached.
>> To see more you need admin tools, I use "phpMemcachedAdmin" for this.
>> But with these tools you just see the detail status and config of
>> memcached,
>> the hitrates and the Slab details.
>>
>> If you know the size of the session data, you can look into the
>> slab details and see the data there.
>>
>> Greetings
>> Frank
>>
>>
>> On 03.10.2015 22:56, Tim Dunphy wrote:
>>
>>> Hey guys,
>>>
>>> Using the stats command to the memcached telnet interface, what am I
>>> looking for in the outuput to verify that sessions are indeed being stored
>>> in memcached?
>>>
>>> Here's what I see in the output of that command:
>>>
>>> Connected to localhost.
>>> Escape character is '^]'.
>>> stats
>>> STAT pid 15660
>>> STAT uptime 520834
>>> STAT time 1443903604
>>> STAT version 1.4.22
>>> STAT libevent 2.0.21-stable
>>> STAT pointer_size 64
>>> STAT rusage_user 24.649971
>>> STAT rusage_system 25.674705
>>> STAT curr_connections 11
>>> STAT total_connections 2036
>>> STAT connection_structures 14
>>> STAT reserved_fds 20
>>> STAT cmd_get 60483
>>> STAT cmd_set 53862
>>> STAT cmd_flush 0
>>> STAT cmd_touch 0
>>> STAT get_hits 57239
>>> STAT get_misses 3244
>>> STAT delete_misses 13
>>> STAT delete_hits 875
>>> 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 13866189
>>> STAT bytes_written 27434116
>>> STAT limit_maxbytes 67108864
>>> STAT accepting_conns 1
>>> STAT listen_disabled_num 0
>>> STAT threads 4
>>> STAT conn_yields 0
>>> STAT hash_power_level 16
>>> STAT hash_bytes 524288
>>> STAT hash_is_expanding 0
>>> STAT malloc_fails 0
>>> STAT bytes 1412767
>>> STAT curr_items 1173
>>> STAT total_items 53854
>>> STAT expired_unfetched 12
>>> STAT evicted_unfetched 0
>>> STAT evictions 0
>>> STAT reclaimed 20
>>> STAT crawler_reclaimed 0
>>> STAT lrutail_reflocked 0
>>> END
>>>
>>> What other stats are interesting to look at in relation to mediawiki and
>>> why?
>>>
>>> Thanks,
>>>
>>> Tim
>>>
>>>
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