# Using DMK JavaScript Scripts

DMK provides a `$DMK_HOME/js` folder where several scripts are located. Feel free to add yours.

* `collection_size.js`: List all collections on the instance, including size, storage size, document count, and average object size.
* `db_sz.js`: List all databases on the instance.
* `get_cfg.js`: Retrieve the configuration information from mongosh.
* `get_uri.js`: Retrieve the MongoDB URI.
* `rs_status.js`: Display the current status of the replica set if the instance is part of one.
* `server_info.js`: Retrieve general information about the instance.

#### Example

```bash
mongodb@vm00:/home/mongodb/ [mdb01] msp $DMK_HOME/js/collection_size.js
Database: admin
--------------------------------------
  Collection: system.version
    Size: 		 0.00 MB
    Storage Size: 	 0.02 MB
    Count: 		 1
    Avg Object Size: 	 0.06 KB

Database: config
--------------------------------------
  Collection: system.sessions
    Size: 		 0.00 MB
    Storage Size: 	 0.00 MB
    Count: 		 0
    Avg Object Size: 	 0.00 KB

Database: local
--------------------------------------
  Collection: startup_log
    Size: 		 0.00 MB
    Storage Size: 	 0.02 MB
    Count: 		 1
    Avg Object Size: 	 2.51 KB
```

```bash
mongodb@vm00:/home/mongodb/ [mdb01] msp $DMK_HOME/js/server_info.js

General
  MongoDB version : 8.0.16
  Environment   : rhel88:x86_64
  Config file     : /u01/app/mongodb/admin/mdb01/etc/mdb01.conf
Replicaset
  No replicaset defined

Active connections:
{
  current: 4,
  available: 815,
  totalCreated: 33,
  rejected: 0,
  active: 1,
  threaded: 4,
  exhaustIsMaster: Long('0'),
  exhaustHello: Long('0'),
  awaitingTopologyChanges: Long('0'),
  loadBalanced: Long('0')
}
```


---

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