Logger - Collection Info Read

Endpoint

/o?method=collection_info

Overview

Returns storage info for the app-specific logger collection: configured cap, current document count, and max value used by logger.

Authentication

Pass api_key or auth_token as a query parameter, or send countly-token as a header. See Authentication.

Permissions

Requires logger Read permission.

Request Parameters

Parameter	Type	Required	Description
method	String	Yes	Must be collection_info.
api_key	String	Conditional	Required if auth_token is not provided.
auth_token	String	Conditional	Required if api_key is not provided.
app_id	String	Conditional	Required for non-global-admin users during read validation.

Examples

Read logger collection usage

/o?
  method=collection_info&
  api_key=YOUR_API_KEY&
  app_id=6991c75b024cb89cdc04efd2

Response

Success Response

Standard path:

{
  "capped": 1000,
  "count": 126,
  "max": 1000
}

Fallback path (when count query fails):

{
  "capped": 1000,
  "count": 1000,
  "max": 1000,
  "status": "error"
}

Response Fields

Field	Type	Description
capped	Number	Logger cap value used by the endpoint.
count	Number	Current document count in logs{appId} (or fallback cap value on error).
max	Number	Same cap value returned for compatibility.
status	String	Present only in fallback response; value is "error".

Error Responses

• 400

{
  "result": "Missing parameter \"api_key\" or \"auth_token\""
}

• 400

{
  "result": "Token not valid"
}

• 401

{
  "result": "No app_id provided"
}

• 401

{
  "result": "User does not exist"
}

• 401

{
  "result": "App does not exist"
}

• 401

{
  "result": "User does not have right"
}

• 401

{
  "result": "User is locked"
}

• 401

{
  "result": "Token is invalid"
}

Behavior

Behavior Modes

Mode	Trigger	Processing Path	Response Shape
Stats success	$collStats aggregation succeeds	Reads storageStats.count from logs{appId} and returns cap/count/max values.	Raw object: { "capped": 1000, "count": N, "max": 1000 }
Stats fallback	$collStats aggregation throws	Returns fallback object with cap values and status: "error".	Raw object: { "capped": 1000, "count": 1000, "max": 1000, "status": "error" }

Impact on Other Data

• Read-only endpoint. It does not modify any collections.

Operational Considerations

• This endpoint uses a live $collStats query on the app log collection.
• If stats lookup fails, response still returns 200 with status: "error" and fallback numeric values.

Limitations

• capped/max values come from server constant (1000) used by this endpoint.
• Fallback values are not real counts and should not be used for storage planning.

Related Endpoints

• Logger - Logs Read

Implementation details

Database Collections

Collection	Used for	Data touched by this endpoint
countly.members	Authentication and permission checks	Reads member account, lock state, and feature-level app permissions.
countly.apps	App validation/context loading	Validates app_id and loads app context for access checks.
countly.logs{appId}	Collection usage metrics	Counts documents in the app-specific request-log collection.