Uploaded image for project: 'Core Server'
  1. Core Server
  2. SERVER-3181

Add option to listDatabases to only get db names, not size info

    • Fully Compatible
    • v3.4, v3.2
    • Storage 2017-03-06

      I have about 29377 files (including datafile and nsfile), 13666 databases. The total size is about 1TB. The mongod started with parameters "smallfiles" and "noprealloc".
      When I run the command listDatabases, it takes too long on calculating "sizeOnDisk" and determining the empty of database, more than a hour sometimes. But I just need a list of database names. An option to not display size or empty probably makes sense.
      I found that mongod will receive the listDatabases command in the following cases:
      1. Dump all databases use mongodump
      2. A Member of replica set doing initialSync
      3. Add a new shard to a cluster.
      In these cases, listDatabases may cause mongod overload and can not do the normal queries.

            geert.bosch@mongodb.com Geert Bosch
            elmerzhang Lei Zhang
            10 Vote for this issue
            27 Start watching this issue