fluent-plugin-mongo-slow-query

It will be helpful to find out the slow operations of MongoDB and ayalyze the query prototype. The usage is almost same as in_tail.

Install

$ fluent-gem install fluent-plugin-mongo-slow-query

<source>
    type mongo_slow_query
    path /path/to/mongodb/logfile
<source>

time local time of host that the MongoDB instance is running on
op operation, for example: query update remove getmore command
ns namespace, concatenation of the database name and the collection name
detail the deatils of operation
query the prototype of query, it is an empty string when op is command for example:
{ address: { country: "China", city: "Beijing" } } => { address.country, address.city }
{ ts: { $gt: 1411029300, $lt: 1411029302 } => { ts.$gt, ts.$lt }
it's convenient to statistics the similar slow queries with the same prototype and build indexes
ms time used, unit: millisecond
nscanned number of documents scanned
nmatched number of documents matched
nmodified number of documents modified
reslen response length