Quotas and limits

Logging usage limits

Category	Maximum value
Size of a log entry	256 KB^*
Size of an entries.write request	5 MB^*
Number of entries.write API calls	1000 per second, per project
Number of entries.list API calls	1 per second, per project
Export sinks	90 per project
Exclusion filters	50 per project

^* This approximate limit is based on internal data sizes, not the actual REST API request size.

Logs-based metrics

Category	Maximum value
Length of label value	1,024 bytes
Length of label description	800 bytes
Length of metric description	8,000 bytes
Active time series^1	30,000
Metric descriptors per project	500
Histogram buckets per custom distribution metric	200

¹A time series is active if you have written data points to it within the last 24 hours.

Stackdriver Logging API quotas and limits

Category	Maximum value
Limits to API usage	To view your quota, go to the API dashboard. Click an API and select Quotas.
Lifetime of API page tokens	24 hours

Logs retention periods

Log type	Retention period
Admin Activity audit logs	400 days
Data Access audit logs	30 days
System Event audit logs	400 days
Access Transparency logs	400 days
Logs other than audit logs or Access Transparency logs	30 days