# N

Each statistical rule must have its own entry in the configuration file. Entries must be numbered consecutively, starting from `0` (zero).

Each rule must have the following format:

`Type | Port | MeterName`

You can set `Type` to any of the following values:

- `Service`. Service statistics are statistics collected by an ACI service about itself (for example, the number of documents indexed).
- `Process`. Process statistics are the statistics collected by the Controller server about the ACI service process (for example, executable path, uptime).
- `System`. System statistics are statistics collected by the Controller server about the system (for example, free memory, disk space).
- `*`. Monitors all statistics.

You can set `Port` to `*` to monitor all available ports, or to the number of a specific service port. If you set `Type` to `System`, leave `Port` empty.

You can set `MeterName` to `*` to monitor all meters for the specified `Type` and `Port`, or you can specify the meter name itself, with the parts of the meter name separated by pipe characters. For example:

`Service|Statistics|10SecondRequestsPerSecond`

To exclude a particular statistical meter from monitoring by Controller, include an exclamation mark at the start of the rule. For example:

`9=!system||cpu|*|*`

You can also use the `*` wildcard character to match characters across components, rather than within single components. For example:

`3=!system||disk|/run*`

This rule filters out the statistical meter `disk|/run/lock|free bytes`.

Type: | Boolean
Default: | None
Required: | Yes
Configuration Section: | StatsMonitor
Example: | `0=Service|*|Service|*|* 1=Service|*|ACI|*|Count 2=Service|*|Database|*|* 3=!system||disk|/run*`
See Also: | NumRules

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