# Percona Server for MongoDB parameter tuning guide

Percona Server for MongoDB includes several parameters that can be changed
in one of the following ways:

=== ":octicons-file-code-24: Configuration file"

     Use the `setParameter` admonitions in the configuration file
     for persistent changes in production:     

     ```yaml
     setParameter:
       <parameter>: <value>
     ```

=== ":material-console: Command line"

     Use the `--setParameter` command line option arguments when running the `mongod` process for development or testing purposes:      

     ```{.bash data-prompt="$"}
     $ mongod \
      --setParameter <parameter>=<value>
     ```

=== ":simple-mongodb: The `setParameter` command"

     Use the `setParameter` command on the `admin` database
         to make changes at runtime:         

     ```{.javascript data-prompt=">"}
     > db = db.getSiblingDB('admin')
     > db.runCommand( { setParameter: 1, <parameter>: <value> } )
     ```

## Parameters

See what parameters you can define in the [parameters list](https://www.mongodb.com/docs/v6.0/reference/parameters/#parameters).