Quotas and limits

This page provides details on the limits that apply to using Cloud Logging.

Logging usage limits

Category Maximum value
Size of a log entry 256 KB1
Maximum number of labels per log entry 64
Length of a log entry label key 512 B2
Length of a log entry label value 64 KB2
Number of sinks 200 per Cloud project
Number of exclusion queries 50 per sink
Number of log buckets 10 per Cloud project3
Number of log views 10 per bucket

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

2 Cloud Logging truncates oversized label keys and values when their associated log entry is written.

3This limit includes buckets that are pending deletion.

Logging API quotas and limits

Category Maximum value
API usage To view your quotas, go to the API dashboard. Click an API and select Quotas.
Lifetime of API page tokens 24 hours
Number of open live-tailing sessions per Cloud project 10
Number of live-tailing entries returned per minute 60,000
Size of an entries.write request 10 MB
Number of entries.write API calls 120,000 per minute, per Cloud project1
Number of entries.list API calls 1 per second, per Cloud project2
Number of Cloud projects or other resource names in a single entries.list API call 100
Number of concurrent copy operations 1 per Cloud project, folder, or organization

You can request changes to your Logging API quotas and limits; for instructions, see Requesting changes to Cloud Logging API quota on this page.

1 Using log exclusions doesn't reduce this number because logs are excluded after the entries.write call is made.

2This value is the default setting for each Cloud project.

Requesting changes to Cloud Logging API quota

You can request higher or lower Logging API limits using the Google Cloud Console:

  1. In the Quotas page, use the checkboxes to select Cloud Logging API, and then click EDIT QUOTAS.

    If you get an error Edit is not allowed for this quota, you can contact Support to request changes to the quota. Note also that billing must be enabled on the Cloud project in order to click the checkboxes.

  2. In the Quota changes panel, select the service to expand the view and then fill in the New limit and Request description fields. Click Next.

  3. Complete the form in the Contact details panel.

  4. Click Submit request.

The other limits described on this page are fixed; you can't request changes to them.

For more information, go to Working with quotas.

Logs-based metrics

The following limits apply to your usage of user-defined logs-based metrics.

Category Maximum value
Number of labels per metric 10
Length of label value 1,024 B
Length of label description 800 B
Length of metric descriptors 8,000 B
Number of metric descriptors per Cloud project 500
Number of active time series1 per metric 30,000
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.

Logs retention periods

Cloud Logging retention periods apply to log buckets, regardless of which types of logs are included in the bucket or whether they were copied from another location. The retention information is as follows:

Log bucket Default retention period Custom retention
_Required 400 days Not configurable
_Default 30 days Configurable
User-defined 30 days Configurable

For the _Default and user-defined log buckets, you can configure Cloud Logging to retain your logs between 1 day and 3650 days. For information on setting retention rules, see Configuring custom retention.