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  1. Core Server
  2. SERVER-25631

IndexStats needs to maintain all historical data. Not only from restart of Mongod process

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      As a DBA I would like to really troubleshoot performance. A great source of information would normally be found in Index usage. However, from what I can work out (and the documentation states), a restart of the Mongod process resets this information.
      I would like to know if this can be written out somewhere instead. This is vital information that is useless if it gets reset on restart.
      For example:
      I deploy new code and my performance falls off a cliff.
      It could be that an index is causing the problem because of too many inserts being added and maybe disabling this index during load is the solution. However, the production server crashed and I can no longer see the stats of usage.

      It would be very helpful to add this to rs.status type view so that I can ses the index across all replica's

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            david.storch@mongodb.com David Storch
            mark.jones Mark Jones
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