mongodb - mongostat query column vs active read(ar) column interpretation - 


insert query update delete getmore command % dirty % used flushes       vsize     res qr|qw ar|aw netin netout conn     time    1405   622     *0     *0       0     1|0     6.8   70.0       0    2.3g    2.1g   0|0   1|0    2m   205k   12 18:35:49 1895   978     *0     *0       0     1|0     6.9   70.3       0    2.3g    2.1g   0|0   1|0    3m   353k   12 18:35:50 1951   764     *0     *0       0     3|0     7.1   70.4       0    2.3g    2.1g   0|0   1|0    3m   228k   12 18:35:51

why there difference between query operation number in hundred while active read(ar) metrics remains one.

i running findone queries each connection got single query read operation. how interpret mongostat?

from mongostat:

ar : number of active clients performing read operations.

it's active readers, not active reads.


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