Limits and parameters

This article lists all the default limits and parameters of the Glass Data platform. If you reach any of these limits, contact us and we will evaluate exceptions on a case-by-case basis.

Retention

Original data

Received events are retained for 5 years, with every field you sent and every field filled in by rules. This data can be queried through the Explore screen.

Retention applies per event type and does not depend on volume: a payment event type and an authentication one are retained for the same period.

Metrics and alerts

Metrics and their respective alerts are retained depending on the aggregation interval:

Interval	Retention
1 minute	7 days
5 minutes	30 days
1 hour	6 months
1 day	1 year
7 days	5 years

Monitoring

Anomaly detection trains the model with the recent history of the metric, measured in intervals of the monitor itself. The default window depends on the interval and on whether the seasonality adjustment is enabled.

Interval	Default analysis window	With seasonality adjustment
1 minute	40 intervals	not applicable
5 minutes	40 intervals	not applicable
1 hour	40 intervals	168 intervals (7 days)
1 day	40 intervals	49 intervals (7 weeks)
7 days	40 intervals	not applicable

The analysis runs only when the window holds at least 3 points. Points still within a suspended learning period are discarded before that check.

The window can be adjusted per monitor, along with the sensitivity and the other options described in advanced settings.

Alerts

Open alerts can be closed automatically by normalisation or expiration. In addition, new alerts temporarily interrupt machine learning to prevent them from being incorporated prematurely into the predictive models.

Interval	Normalisation	Expiration	Learning pause
1 minute	3 measurements	10 minutes	2.5 hours
5 minutes	3 measurements	50 minutes	6 hours
1 hour	2 measurements	10 hours	12 hours
1 day	1 measurement	10 days	3 days
7 days	1 measurement	70 days	3 weeks

Normalisation is the number of consecutive normal measurements required to close the alert, and can be adjusted per monitor. Expiration equals 10 intervals of the monitor.

Metrics and monitors

Limit	Maximum quantity
Metrics per event type	20
Monitors per event type	20
Dimensions per metric	10
Values per filter	10
Aggregations queried in the chart at once	5
Series expanded from a list in the chart	10
Trackable fields per event type	2
Tracking retention	90 days

Rules and lists

Limit	Maximum quantity
Rules per account	30
Conditions per rule	30
Lists used per condition	3
Lists used per rule across all conditions	30
Characters per expression	1024
Items per list	10,000

Analyses

Limit	Maximum
Window of a cell	90 days
Fields combined in a cell’s dimension	5
Values per filter	20
Observations evaluated on percentage measures	100

See analyses for what each of these fields means.

Export

Exporting records on the Explore screen has the following limitations:

Limit	Maximum quantity
Records per export	10,000,000
Records exported per day across all exports	10,000,000

Exports are available for download in the admin panel for 7 days.

Metadata

Limit	Maximum quantity
Metadata per entity	10
Cardinality per metafield	10,000

Cardinality means the number of different values in a metafield. The platform will not prevent registering values above the maximum cardinality, but metrics may ignore less frequent dimensions.