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Exercise caution while editing /usr/local/omk/conf/opCommon.nmis; if a syntax error is induced all OMK applications will cease to function.

  • ABI 1 (NMIS 8)
    • In omk/conf/opCommon.nmis, omkd_workers is set at 10. Try reducing this number to 5 and then restart the omkd service.
      If you THEN find YOU need more omkd_workers, increment this value by one and test again until you get to a suitable value for omkd_workers
  • ABI 2 (NMIS 9)
    • In omk/conf/opCommon.json, omkd_workers is set at 10. Try reducing this number to 5 and then restart the omkd service.
      If you THEN find YOU need more omkd_workers, increment this value by one and test again until you get to a suitable value for omkd_workers

  • The default MongoDB table type is wiredtiger.
    If your MongoDB installation is using table type wiredtiger, please read
    https://docs.mongodb.com/manual/reference/configuration-options/#storage.wiredTiger.engineConfig.cacheSizeGB

    • Consider setting cacheSizeGB appropriately taking into consideration the memory requirements of other processes running on this box.
      With default mongod settings, a box with 16GB memory will most probably use more than 7GB of memory for cacheSizeGB.

      This may be too much considering the box may be running NMIS, OMK and other ppplications too.
      • To check how much memory mongod is using for this cache in the mongod.log,  search of cache_size where it is provided in MB, for example:
        • STORAGE [initandlisten] wiredtiger_open config: create,cache_size=7414M


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