This topic describes the limits in ActionTrail.

Item Upper limit
Number of trails that is created by an Alibaba Cloud account in each region 5
Number of Object Storage Service (OSS) buckets that can be configured for a trail 1
Waiting time to query a log by using the Alibaba Cloud Management Console after an event occurs 10 minutes
Time required for being able to query a log in the OSS bucket after an event occurs 10 minutes
Number of days that ActionTrail events are retained for query by using the Alibaba Cloud Management Console or calling API operations 90 days
Maximum number of times that historical events for a single-account trail are queried per second by using the Alibaba Cloud Management Console or calling the LookupEvents operation 2
Size of a compressed ActionTrail event log file that is saved to an OSS bucket 2 KB